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WELDING PROCEDURES FOR TITANIUM AND TITANIUM ALLOYS

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糟木匠 發表於 2012-3-8 22:07:43 | 顯示全部樓層 |閱讀模式
WELDING PROCEDURES FOR TITANIUM AND TITANIUM ALLOYSAuthors: J. J. Vagi; R. E. Monroe; R. M. Evans; D. C. Martin; BATTELLE MEMORIAL INST COLUMBUS OH                                       
Abstract: [url=http://www.google.com/url?ct=abg&q=https://www.google.com/adsense/support/bin/request.py%3Fcontact%3Dabg_afc%26url%3Dhttp://www.stormingmedia.us/74/7 ... zJ3f41OQ43CyufVQzcQ]Ads by Google[/url]
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                                        The report covers the state of the art of welding procedures for titanium and its alloys. Methods employed in the past and present are described. Many of the conventional welding and brazing processes are used for joining titanium and its alloys. Information on the use of these processes, when available, was condensed or extracted and included in this report. Necessary additional processing such as preweld cleaning, joint preparation, postweld cleaning, and postweld operations are also included since they form an integral part of the welding processes without which successful welding cannot be accomplished. Joining processes that have been used only experimentally also are described briefly. The need for proper preweld cleaning operations and proper shielding to prevent contamination of titanium welds is emphasized throughout.

                                                                        
Limitations:APPROVED FOR PUBLIC RELEASE
Pages: 236
Report Date:OCT 1965
Contract Number:Z, DA01021AMC11651Z
Report Number: 0742336
Keywords relating to this report:
*TITANIUM
*TITANIUM ALLOYS
*WELDING
AIRFRAMES
ARMOR
BRAZING
CLEANING
CONTAINERS
HULLS_MARINE_
REPORTS
STATE OF THE ART
STRUCTURAL COMPONENTS
VEHICLES
WELDS
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 樓主| 糟木匠 發表於 2012-3-9 21:53:58 | 顯示全部樓層
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After Effects of Welding Armor Steels
31 Aug 2011
26 pages
Authors: Matt Rogers; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI                                                    
Laser Peening for Mitigation of Stress Corrosion Cracking at Welds in Marine Aluminum
JUN 2011
77 pages
Authors: Heather R. Mattern; NAVAL POSTGRADUATE SCHOOL MONTEREY CA                                                    
This work examines the use of laser peening (LP) for mitigation of stress corrosion cracking (SCC) in marine grade aluminum alloys (Al-Mg). These alloys can be sensitized during welding and will develop a tensile residual stress in the heat affected zone that may promote SCC in a salt water environment. Metal inert gas welded aluminum alloy 5083 (4.8wt% Mg) plate was laser peened using a variety of laser intensities to ...


Microstructure Evolution during Friction Stir Welding of Mill-Annealed Ti-6Al-4V (Preprint)
May 2011
46 pages
Authors: A  L Pilchak; J  C Wiliams; W Tang; H Sahiner; A  P Reynolds; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE                                                    
In this study, mill-annealed Ti-6Al-4V plates were successfully friction stir welded over a wide range of processing parameters using a tungsten - 1%La2O3 tool. Two K-type thermocouples embedded in the tool indicated that approximately 25 pct. of the heat generated during welding was transferred out of the workpiece and into the tool. The thermocouple data, combined with observations of the microstructure, indicated that the stir zone of all welds exceeded ...


Texture Development in Friction Stir Welds
2011
8 pages
Authors: R. W. Fonda; K. E. Knipling; NAVAL RESEARCH LAB WASHINGTON DC                                                    
The shear textures that develop in friction stir welds are reviewed and discussed. In all the materials examined, including face centred cubic (fcc), body centred cubic (bcc) and hexagonal close-packed (hcp) materials, friction stir welding produces a predominant shear texture with the close-packed directions aligned with the shear direction (SD) and the close-packed plane normal perpendicular to both the SD and the shear plane normal. This orientation corresponds to the ...


Validations of Computational Weld Models: Comparison of Residual Stresses
AUG 2010
Authors: John Goldak; GOLDAK TECHNOLOGY INC OTTAWA (CANADA)                                                    
The objective of this project was to validate the capability of VrWeld to simulate the weld buildup process in two experimental setups. Setup I had a central depression with dimensions of 100 x 100 x 3 mm, while Setup II had a central depression with dimensions of 200 x 200 x 3 mm. This report documents the validation of the computer model's capability to compute residual stress in overlay weld ...


Ultrasonic Phased Arrays for the Inspection of Thick-Section Welds
Sep-2009
13 pages
Authors: R J Ditchburn; M E Ibrahim; DEFENSE SCIENCE AND TECHNOLOGY ORGANIZATION VICTORIA (AUSTRALIA) MARITIME PLATFORMS DIV                                                    
Ultrasonic phased arrays will eventually replace conventional ultrasonic methods in many nondestructive evaluation (NDE) applications. However, the transition to phased arrays is not without its pitfalls and challenges. In this report we present a summary of the advantages and limitations of phased-array ultrasonics in NDE, with specific reference to the inspection of thick-section welds. The main advantages offered by phased arrays over conventional systems are increased sensitivity, coverage and speed. ...


The Concept of Electrically Assisted Friction Stir Welding (EAFSW) and Application to the Processing of Various Metals
01-Sep-2008
33 pages
Authors: William A Ferrando; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD SURVIVABILITY STRUCTURES AND MATERIALS DIRECTORATE                                                    
This report introduces a novel variant of conventional friction stir welding (FSW). Since 1991, friction stir welding provides an alternative to arc welding as a metal joining method in numerous applications. In FSW, the heat required to soften the target metal is generated totally by the rotating friction of the tool which necessitates rather high downward (Z) operating force and often leads to relatively short tool life. In the proposed ...


Numerical Simulation of Gleeble Torsion Testing of HSLA-65 Steel
Apr-2008
36 pages
Authors: David R Forrest; Matthew F Sinfield; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD SURVIVABILITY STRUCTURES AND MATERIALS DIRECTORATE                                                    
NSWCCD has used a Gleeble thermomechanical simulator as a tool to provide carefully controlled deformation cycles on metallurgical samples to study the properties and physics of friction stir welds. Our Gleeble experiments provide critical information that cannot be obtained from experimental friction stir welds because the metallurgical state can change radically with position due to the extreme thermal and strain field gradients within a friction stir weld. This allows us ...


Physics and Cyber-Enabled Manufacturing Process Control
FEB 2008
3 pages
Authors: P. J. Casey; Cameron Booth; Joseph Beaman; Al Mok; TEXAS UNIV AT AUSTIN                                                    
The objective of the project is to be able to predict welding failures in real time and correct them as quickly as possible. This will be a drastic shift from the current statistically controlled manufacturing to dynamic model based manufacturing control.


The "Lazy S" Feature in Friction Stir Welding of AA2099 Aluminum -Lithium Alloy
DEC 2007
63 pages
Authors: Holli K. Klages; NAVAL POSTGRADUATE SCHOOL MONTEREY CA                                                    
The addition of Lithium to Aluminum-Lithium (Al-Li) alloys results in reduced density as well as increased stiffness and strength, and so these materials are attractive for selected aerospace structures. Friction Stir Welding (FSW) of Al-Li alloys may provide high join efficiency in such structures but potential FSW defects must be understood. This thesis examines the occurrence of the "Lazy S: feature, which may be a defect. Welds were made after ...


Development of an Ultralight Pulse Gas Metal ARC Welding System for Shipyard Applications
27 JUL 2007
40 pages
Authors: Neil D. Fichtelberg; GENERAL DYNAMICS GROTON CT ELECTRIC BOAT DIV                                                    
A significant cost in shipbuilding is setup during unit erection and outfitting to support welding operations. For small welding jobs such as hanger and tack welding, the labor associated with equipment relocation and setup can be a large part of the total cost of welding. This is primarily due to the need to move large and cumbersome welding equipment and cables through confined structures. As a result, many hangers and ...


Numerical Evaluation of Stress Intensity Factors (Ki) J-Integral Approach
SEP 2006
11 pages
Authors: Guillermo A. Riveros; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS                                                    
The purpose of this Coastal and Hydraulics Engineering Technical Note (CHETN) is to describe the numerical evaluation of the stress intensity factors using the J-integral approach (Rice 1968a, 1968b). The stress intensity factors have been calculated for a semi-infinite plate with an edge crack. This case has a known closed-form solution, and only a 1.25 percent difference between the numerical and closed-form solution was obtained. This CHETN also presents the ...


40"x44" Metal Pallet with Metal Adapters with PA125 Metal Boxes, MIL-STD-1660 First Article Tests
AUG 2006
29 pages
Authors: ARMY DEFENSE AMMUNITION CENTER MCALESTER OK VALIDATION ENGINEERING DIV                                                    
The U.S. Army Defense Ammunition Center (DAC), Validation Engineering Division (SJMAC-DEV) conducted First Article Tests in accordance with MIL-STD-1660, "Design Criteria for Ammunition Unit Loads" on the 40" x 48" metal pallet with metal adapters with PA125 metal boxes manufactured by Choctaw Manufacturing and Development Corporation (CDMC), from Hugo, Oklahoma. Six test units were tested. The test units were loaded and passed with a load of 2,560 lbs each for ...


Ultrasonic Detection Using Correlation Images (Preprint)
AUG 2006
Authors: Raini Cepel; K. C. Ho; Brett A. Rinker; Donald D. Palmer; Steven P. Neal; MISSOURI UNIV-COLUMBIA COLL OF ENGINEERING                                                    
In ultrasonics, image formation and detection are generally based on signal amplitude. In this paper, we describe an amplitude independent approach for imaging and detection based on the similarity of adjacent signals, quantified by the correlation coefficient calculated between A-scans. Correlation coefficient images are introduced and shown with C-scan images to demonstrate flat-bottom-hole and crack detection in experimental data and planar defect detection at very low signal-to-noise ratio using simulated ...


Collaborative Research and Development Delivery. Order 0041: Models for the Prediction of Interfacial Properties
AUG 2006
24 pages
Authors: Bence Bartha; UNIVERSAL TECHNOLOGY CORP DAYTON OH                                                    
The research in support of the Air Force Research Laboratory, Materials and Manufacturing Directorate was conducted at Wright-Patterson AFB, Ohio from 25 July 2005 through 4 August 2006. The task developed various experimental and computational tools to determine the material behavior of weld interfaces and local grain behavior of materials. Stereo imaging, optical microscopy and scanning electron microscopy were used to determine the local interfacial characteristics of welds as well ...


Occupational Survey Report, AFSC 2A7X1 Aircraft Metals Technology
28 SEP 2005
38 pages
Authors: Tyrone Hill; AIR FORCE OCCUPATIONAL MEASUREMENT SQUADRON  RANDOLPH AFB TX                                                    
These briefing charts concern the Air Force's occupational survey for Aircraft Metals Technology. Topics discussed are the homogeneous job structure with five independent jobs are identified, technical tasks are performed throughout all skill levels, career ladder documents well-supported by survey data and job satisfaction indicators are very good. An aircraft metals technician designs, welds, heat treats, fabricates, and machines percision tools, components, and assemblies for aerospace weapon sytems and related ...


Novel Approach for Welding Stainless Steel Using Cr-Free Welding Consumables
31 DEC 2004
80 pages
Authors: J. C. Lippold; G.S. Frankel; OHIO STATE UNIV  COLUMBUS DEPT OF MATERIALS SCIENCE AND ENGINEERING                                                    
This project was a SERDP seed grant that was extended from the normal one year duration to a total of two years. The goal of the project was to demonstrate the feasibility of a new approach for welding stainless steel using Cr-free consumables. Stainless steels are usually selected as a material of construction for their corrosion resistance. When they are fabricated into structures, stainless steel components are often joined by ...


Advanced Methods for Highly-Portable Field Repair Welding and Assessing Phase Stability and Aging of Alloys in Service
03 SEP 2004
28 pages
Authors: David L. Olson; Yeong-Do Park; COLORADO SCHOOL OF MINES GOLDEN DEPT OF METALLURGICAL ENGINEERING                                                    
New welding consumables and practices for weld repair are being investigated. Special attention was given to the repair of light metals (aluminum and magnesium alloys). Metal powder filled cored aluminum wires to be used with microwire GMA spool hand held guns were being developed. The use of strip-to-wire mill to make powder metal-cored wires was being perfected as an effective methodology for making specialty alloy welding consumable wires. These wires ...


Intermodal Storage and Transport Frame (ISTF) MIL-STD-1660 Design Criteria for Ammunition Unit Loads Tests
MAR 2004
32 pages
Authors: Philip W. Barickman; ARMY DEFENSE AMMUNITION CENTER MCALESTER OK VALIDATION ENGINEERING DIV                                                    
The U.S. Army Defense Ammunition Center (DAC), Validation Engineering Division (SJMAC-DEV) was tasked by the Transportation Engineering Division, (SJMAC-DET) to conduct testing on the Intermodal Storage and Transport Frame (ISTF), manufactured by Mobile Shelter Systems, Inc. The ISTF was evaluated by the testing procedures set forth in MIL-STD-1660. Stacking, vibration, edgewise rotational drop, incline impact, sling compatibility, forklifting, and disassembly testing were conducted on the ISTF units. Each unit sustained ...


Modular Storage and Transport Frame (MSTF) Low, MIL-STD-1660, "Design Criteria for Ammunition Unit Loads" Testing
SEP 2003
28 pages
Authors: Philip W. Barickman; ARMY DEFENSE AMMUNITION CENTER MCALESTER OK VALIDATION ENGINEERING DIV                                                    
The U.S. Army Defense Ammunition Center (DAC), Validation Engineering Division (SJMAC-DEV) was tasked by Mobile Shelter Systems, Inc. to conduct testing to determine if the Modular Storage and Transport Frame (MSTF) Low, manufactured by Mobile Shelter Systems, Inc., was adequate for unitization and transportation of boxed ammunition. The MSTF Low was evaluated by the testing procedures set forth in MIL-STD-1660. Stacking, repetitive shock, edgewise rotational drop, incline impact, sling compatibility, ...


Development of a Computer Aided Weld Design Tool
MAR 2003
71 pages
Authors: Panagiotis Michaleris; PENNSYLVANIA STATE UNIV UNIVERSITY PARK                                                    
Contributed to the development of a Lagrangial thermo-mechanical process optimization approach. The methodology was demonstrated in the optimization of the thermal tensioning process for the minimization of welding residual stress elimination of buckling distortion. Developed eigenvalue sensitivity analysis capabilities for the prediction and elimination of buckling distortion in large welded structures. Initiated research on the coupled multi- scale thermo-mechanical process modeling of large structures. The approach combines adaptivity and domain ...


Corrosion Mechanisms of UNS N04400 in Sea Water
MAR 2003
24 pages
Authors: Jason S. Lee; Kristine Lowe; RIchard I. Ray; J. Jones-Meehan; Brenda J. Little; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV                                                    
Pitting and dealloying were observed when 70Ni/30Cu (UNS N04400) welded plates were exposed to artificial seawater containing sulfate-reducing bacteria. Attempts were made to differentiate biotic and abiotic corrosion mechanisms. Experiments were conducted in alternating aerobic/anaerobic conditions in the presence of inorganic sulfide and sulfate-reducing bacteria over the course of five months.


The Role of Marine Bacteria in Stainless Steel Pitting
JAN 2002
17 pages
Authors: RIchard I. Ray; Brenda J. Little; Jason S. Lee; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV                                                    
Flat plate and welded stainless steel coupons (316L, Nitronic 50 an AL6xN) were evaluated for potential microbiologically influenced corrosion in seawater. No pitting was observed in flat plate of welded AL6xN under the exposure condition after one year. Pits were located at welds of Nitronic 50 and 316L stainless steels after six- and eight-week exposures. In all cases, large numbers of bacteria were associated with the corrosion products. No corrosion ...


New Welding Consumables and Practice for Highly Portable Field Repair
20 DEC 2001
31 pages
Authors: D. L. Olson; COLORADO SCHOOL OF MINES GOLDEN CENTERFOR WELDING JOINING AND COATINGS RESEARCH                                                    
New welding consumables and practice for weld repair and extended service life were investigated. Exothermally assisted arc welding was successfully accomplished with both SMA and self-shielded FCA welding consumables on steels and the optimum range of exothermic additions and welding parameters was determined Metal powder-filled core aluminum wires were produced which, on welding, promote grain refinement in aluminum weld deposits. Grain refinement in aluminum welds is directly related to weldability ...


Coating-Bond Evaluation Using Dispersion Curves and Laser-Ultrasonics
DEC 2001
31 pages
Authors: Agostino Abbate; Bryon Knight; Moayyed A. Hussain; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS                                                    
The dispersion characteristics of Rayleigh surface waves are used to distinguish the quality of the bond between a coating and the metallic substrate. The velocity versus frequency curves for good or 'welded' bonds differ significantly from the correspondent dispersion curves for poorer or 'smooth' bonds. A theoretical dynamic model of the ultrasonic experiments was developed and compared with experimental results. As examples of welded contacts, we used coatings of tantalum ...


Advances in Hydrogen Management for High Strength Steel
07 JUN 2001
18 pages
Authors: Yeong-Do Park; Chad Lensing; Iman Maroef; David L. Olson; Zamir Gavra; COLORADO SCHOOL OF MINES GOLDEN CENTERFOR WELDING JOINING AND COATINGS RESEARCH                                                    
Diffusible hydrogen content in high strength low alloy steels welding can be better managed with modifications to the low hydrogen welding consumables. The welding consumable alloy content needs to allow the weld metal to transform from austenite to ferrite/martensite at slightly higher temperature than the base metal does. This practice will allow for the best dispersal of hydrogen from the weld deposit and minimizing the tendency of localizing the hydrogen ...


Ship Hull Plating Weld Misalignment Effects When Subjected to Tension
JUN 2001
Authors: M. C. Weaver; DEPARTMENT OF THE NAVY WASHINGTON DC                                                    
Precision fabrication of ships is advancing. Welding is ubiquitous in ship construction and military standards have specified tolerances for joining plates in naval combatants. Precision manufacturing will allow the production of ships with smaller hull plate misalignments. A benefit from this could be improved ship survivability when subjected to underwater explosions. Slip Line Fracture Mechanics interacting with Finite Element Analysis (FEA) gives insight into the deformation, necking and fracture mechanisms ...


Processing and Characterization of Welded Bonds between Thermoset and Thermoplastic Composites
MAY 2001
46 pages
Authors: Stephen H. McKnight; Bruce K. Fink; Veronique Monnard; P.-e. Bourban; Jan-Anders E. Manson; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD                                                    
To assemble complex structures with short cycle times, the feasibility of welding thermoplastic (TP) to thermoset (TS) composites is demonstrated using a phenomenological approach. The effect of the thermal degradation of the TS composite (AS4/3501-6) on its shear strength is assessed in order to minimize the TS degradation during the welding process. The degradation is reported to decrease the shear strength in an exponential way. A layer of TP (polysulphone ...


Studies of Transport Phenomena and Their Effect on Weld Quality in Laser Beam Welding
31 MAR 2001
25 pages
Authors: Hai-Lung Tsai; MISSOURI UNIV-ROLLA DEPT OF MECHANICAL AND AEROSPACE ENGINEERING                                                    
The objective of this project was to study complicated transport phenomena (laser-material interaction, heat transfer, and molten metal fluid dynamics) and their effect on weld quality in laser beam welding. The study investigated the formation of keyholes, keyhole dynamics, and possible weld defects caused by keyhole instability. A mathematical model based on continuum formulation (for handling metal flow during alloy melting/solidification) and volume-of-fluid (for handling free surfaces) was successfully developed ...


Accessories for Enhancement of the Semi-Automatic Welding Processes
12 DEC 2000
62 pages
Authors: Douglas M. Wheeler; James M. Sawhill; NEWPORT NEWS SHIPBUILDING AND DRY DOCK CO VA                                                    
The project's objective is to identify specific areas of the semi-automatic welding operation that is performed with the major semi-automatic processes, which would be more productive if a suitable mechanical or electrical accessory was available. Ideas were solicited and concepts proposed for accessories that would suit the identified applications when performing GMAW, FCAW, and GTAW processes. Interested manufacturers would work to develop and evaluate prototypes suitable for production shipbuilding environments. ...


Dynamic Fracture Toughness Characterization of HY-100 Under-Matched Welds
FEB 2000
92 pages
Authors: Stephen M. Graham; Michael D. McLaughlin; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD SURVIVABILITY STRUCTURES AND MATERIALS DIRECTORATE                                                    
Welds in marine structures are typically fabricated such that the yield strength of the weld metal is higher than the base plate (over-matched). Allowing the weld metal yield strength to be less than the base metal (under- matching) can increase productivity and weld metal toughness; however, there is some concern that under-matching increases the crack driving force and decreases the weld metal tearing resistance. This study examined fracture behavior of ...


The National Shipbuilding Research Program. Development of Electromagnetic Acoustic Transducers (EMATS) for Surface/Volumetric Inspection of Welds
17 JAN 2000
122 pages
Authors: D. T. Maclauchlan; S. P. Clark; M. B. Perry; J. W. Hancock; MCDERMOTT TECHNOLOGY INC LYNCHBURG VA CONTRACT RESEARCH DIV                                                    
This report summarizes the results of the National Shipbuilding Research Program (NSRP) Project 7-96-1, ElectroMagnetic Acoustic Transducers (EMATs) for Surface/Volumetric Inspection of Welds. Project 7-96-1 is a continuation of two earlier projects concerning shipyard application of EMATs for surface and volumetric weld inspection. An initial feasibility study (7-91-3) completed for the SP-7 Welding Panel in June, 1994 demonstrated laboratory feasibility for the use of EMAT generated surface waves to replace ...


Coating Evaluation Using Analytical and Experimental Dispersion Curves
NOV 1999
16 pages
Authors: B. Knight; M. Hussain; J. Frankel; J. F. Cox; J. Braunstein; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER  WATERVLIET NY BENET WEAPONS LAB                                                    
Well-bonded or "welded" contact and poorly bonded or "smooth" contact bonds were studied. As examples of welded contact bonds, we used sputtered  tantalum and electrodeposited high contraction chromium coatings that were  deposited onto steel substrates under controlled conditions. In order to  simulate smooth contact coatings, thin sheets of nickel and tantalum were  epoxied to copper and steel substrates, respectively. We used the method  originated by ...


PRET: A University-Industry Partnership Research and Transition of Gamnma Titanium Aluminides
SEP 1999
152 pages
Authors: Tresa M. Pollock; Paul S. Steif; CARNEGIE INST OF TECH PITTSBURGH PA DEPT OF METALLURGY AND MATERIALS SCIENCE                                                    
Cooling rates during casting have been shown to significantly influence yield strength, for the processing related research, tensile ductility and property variability in three different TiA1 alloys. Variations in ductility are most sensitive to extrinsic defects such as porosity or the presence of large grains oriented for easy straining. A technique for quantitative analysis of surface connected porosity has been developed. Additionally, in the area of induction skull melting, fundamental ...


Hydrogen and Preheat Management in Welded High Strength Steel for Defense Applications
15 JUL 1999
187 pages
Authors: David L. Olson; COLORADO SCHOOL OF MINES GOLDEN                                                    
With the need for new approaches to improve hydrogen management in  higher strength steels, three tasks, each with its special focus and potential  contributions, were established to promote cooperative research with TTCP  operating assignment 013. These efforts are timely due to the introduction of  even higher strength steels in Naval structures and defense hardware. These  steels use new concepts of strengthening (i.e. precipitation) and not ...


Innovative Fabrication Techniques for Aerospace Propellant and Pressurant Tanks. Phase 1
14 JUL 1999
57 pages
Authors: G. A. Malone; Rich Edwards; Brian Babcock; Wanda Hudson; ELECTROFORMED NICKEL INC HUNTSVILLE AL                                                    
To be economically attractive, weight and performance for small  earth-to-orbit launch systems and station keeping space vehicles must be  improved at significantly lower costs while maintaining required payloads. A  major weight and cost factor in any of these devices is the tankage for  propellants and pressurant gases. Innovative and proven manufacturing   technologies such as electroforming have been over-looked as means to meet these needs. ...


Cast Development for Aging Aircraft
25 MAR 1999
9 pages
Authors: Charles S. Lei; Dui W. Lee; William E. Frazier; Jeffrey Waldman; NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD                                                    
High quality investment castings have been increasingly selected for use on commercial and military aircraft due to their cost and weight benefits. Thin wall titanium and aluminum cast components have replaced many heavy complicate and manufacturing intensive, multipiece parts. Thick investment cast parts weighing up to 400 lb have become a reality. Also, welded titanium castings are being implemented on newly developed military aircraft. However, several issues critical for the ...


An Experimental Evaluation of the Fatigue Behavior of AH36 Weld-Repaired Deck Sockets in a Simulated Marine Atmosphere
NOV 1998
19 pages
Authors: Michelle A. Gaudett; X. J. Zhang; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD SURVIVABILITY STRUCTURES AND MATERIALS DIRECTORATE                                                    
Fatigue testing of specimens removed from weld-repaired deck sockets on the fast sealift ship was conducted to satisfy two objectives. The primary objective was to determine the shift in fatigue initiation behavior due to an intermittent salt spray environment. The secondary objective was to validate the fatigue initiation design curves used in the fatigue analysis of the ship deck structure. No effect of a salt spray schedule was observed within ...


Random Vibration Analysis of the XM2l Decontaminant Pumper Module of the Modular Decontamination System
FEB 1998
29 pages
Authors: Stephen J. Colclough; EDGEWOOD RESEARCH DEVELOPMENT AND ENGINEERING CENTER ABERDEEN PROVING GROUNDMD                                                    
The XM21 Decontaminant Pumper module of the Modular Decontamination System was analyzed using finite element analysis techniques to show why the first design iteration passed transportation vibration testing, the current design iteration did not, and whether the proposed changes to the system will pass. The baseplate in the current design developed a fatigue crack at a weld when vibration tested. The failure was caused by the switching of position between ...


The National Shipbuilding Research Program, Development and Evaluation of Improved Flux-Cored Welding Consumables, Phase 1
09 JAN 1998
36 pages
Authors: NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD                                                    
The objective of NSRP Project #7-95-4 is to evaluate and develop an improved flux-cored wire for use in commercial shipbuilding that can be produced within the U.S. and is comparable or exceeds those available from foreign producers. This report deals with a portion of the first phase consisting of evaluating FCAW wires from U.S. and foreign manufacturers to identify the differences in weldability, arc characteristics and quality. The electrode evaluation ...


Defect Condemnation for Submarine Pressure Hull Welds
JAN 1998
Authors: J. R. Matthews; J. F. Porter; T. MacAdam; DEFENCE RESEARCH ESTABLISHMENT ATLANTICDARTMOUTH (NOVA SCOTIA)                                                    
The British standards for submarine pressure hulls indicates that the presence of any lack of fusion defects in the weld is cause for rejection.  However, depending upon the size and location of the defect, certain amounts of  lack of fusion may be acceptable. Six explosion bulge test panels were welded to have lack of fusion flaws; two panels had root flaws and the other four had cap  ...


Laser Based Method of Evaluating the Behavior of Surfaces and Surface Treatments at Transient High Temperatures and Pressures
MAR 1997
111 pages
Authors: V. E. Merchant; J. A. Hewitt; LASER INST EDMONTON (ALBERTA)                                                    
A set of experiments were performed in order to test the ability of a laser based system to simulate the chemical and thermal effects inside a gun barrel. It is expected that a laser based system would be a relatively inexpensive method for testing various materials and coatings for eventual gun barrel use, and to the present time, there are no publicly documented systems capable of such testing. An extensive ...


Hydrogen and Preheat Management in Welded High Strength Steel for Defense Application. (TTCP Workshop and Joint Seminar). Volume I: Workshop Report
28 JAN 97
137 pages
Authors: D. L. Olson; J. L. Davidson; B. F. Dixon; COLORADO SCHOOL OF MINES GOLDEN                                                    
A joint seminar and workshop on hydrogen management in high strength steel weldments were performed to assess the state of the art and science to assess the progress of the TTCP-S11 research activities, to make mid-course corrections to the research activities and to plan for technology transfer and round-robin tests. Achievement highlights, the reorganization of activities to promote cooperative research and operation plan are described.


Hydrogen and Preheat Management in Welded High Strength Steel for Defense Application. (TTCP Workshop and Joint Seminar). Volume II: Joint Seminar Papers
28 JAN 97
248 pages
Authors: D. L. Olson; J. L. Davidson; B. F. Dixon; COLORADO SCHOOL OF MINES GOLDEN                                                    
A joint seminar and workshop on hydrogen management in high strength steel weldments were performed to assess the state of the an and science to assess the progress of the TTCP-S11 research activities, to make mid-course corrections to the research activities and to plan for technology transfer and round-robin tests. Achievement highlights, the reorganization of activities to promote cooperative research and operation plan are described.


Factors Affecting the Impact Toughness of Ultra Low Carbon Steel Weld Metal
SEP 96
102 pages
Authors: Mary E. Gwin; NAVAL POSTGRADUATE SCHOOL MONTEREY CA                                                    
The fundamental factors affecting the impact toughness of four gas metal arc welds (GMAW) made on HSLA-100 base plate using a newly developed steel weld wire were studied. The weld metal analysis included chemistry, mechanical testing (hardness, CVN/FATT), as well as optical, scanning and transmission electron microscopy. Studies of inclusion composition using energy dispersive x- ray (EDX), and electron energy loss spectroscopy (EELS) in the transmission electron microscope were also ...


Acoustic Radiation Efficiency Models of a Simple Gearbox
SEP 96
7 pages
Authors: Mark F. Jacobson; Rajendra Singh; Fred B. Oswald; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER                                                    
Acoustic intensity measurements were conducted on a simple spur gear transmission in a welded steel housing. The radiation efficiency of the housing was computed from the intensity data for the first three harmonics of mesh frequency. Finite element and boundary element methods (FEM/BEM) were used jointly to model acoustics and dynamics of the top plate of the housing. For a simply supported elastic plate, reasonable agreement was achieved between experimental ...


X-Ray Diffraction Characterization of Process-Induced Residual Stress
SEP 96
27 pages
Authors: Daniel J. Snoha; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD                                                    
The U.S. Army Research Laboratory - Materials Directorate (ARL-MD) has utilized the x-ray diffraction (XRD) method of residual stress analysis (RSA) to characterize process-induced residual stress on a variety of polycrystalline metal and ceramic materials. As part of the mechanical failure investigation, modem XRD RSA techniques provide a direct means for quantifying residual stress at the component surface - the location at which most fatigue and stress corrosion cracks originate. ...


The Hydrogen-Induced Cracking Resistance of Consumables for Use in the Fabrication of the COLLINS Class Submarines
JUL 96
Authors: James L. Davidson; AERONAUTICAL AND MARITIME RESEARCH LAB MELBOURNE (AUSTRALIA)                                                    
A MIL-121TM flux cored arc welding consumable, Alloy Rods Dualshield(registered) II 120-M2, has recently been qualified for use in the fabrication of the pressure hull of the Royal Australian Navy COLLINS class submarines. Gapped bead on plate testing has been carried out to compare the hydrogen-induced cracking resistance of welds produced using the flux cored arc consumable with welds produced using the manual metal arc and submerged arc consumables currently ...


Beam Shear Design with Welded Wire Fabric: ACI 318 vs. AASHTO LRFD
APR 96
Authors: Brian A. Green; RENSSELAER POLYTECHNIC INST TROY NY                                                    
Since 1963, the shear design of reinforced and prestressed concrete beams has become unnecessarily complicated. There are currently two different procedures used to design and detail the steel shear reinforcement in concrete beams. The first method, used by the American Concrete Institute (ACI), is purely empirical. Their current design guide, the Building Code Requirements for Structural Concrete (ACI 318-95) and Commentary (ACI 318R-95) uses the results of beam tests to ...


The National Shipbuilding Research Program. Square Butt Pipe Welding
APR 1996
76 pages
Authors: J. Langhelm; James Scheltens; PUGET SOUND NAVAL SHIPYARD BREMERTON WA QUALITY ASSURANCE DIV                                                    
The main objective of this project was the development of welding techniques and procedures to economically weld fabricate pipe. X-ray quality full penetration square butt weld joints were expected. Significant cost savings can be achieved through the reduction in pipe fitting and welding man-hours by utilization of a saw cut square butt joint design. The investigation of the various weld techniques and joint configurations are detailed in this final report ...



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Autonomous Mobility Applique System (AMAS)
08 Nov 2011
19 pages
Authors: Bernard Theisen; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI                                                    
AMAS will provide scalable autonomy in a single material solution agnostic of vehicle. For the AMAS JCTD, AMAS will be implemented in a vehicle specific By-wire kit that would provide the electronically controlled subsystems and interface for the common Autonomy Kit. The Autonomy kit, along with the Bywire kit, would provide Leader/Follower, waypoint navigation and advanced Convoy behaviors. The AMAS JCTD will also address defining an open architecture for future ...


Dynamo: A Model Transition Framework for Dynamic Stability Control and Body Mass Manipulation
Nov 2011
28 pages
Authors: Brian Yamauchi; IROBOT CORP BEDFORD MA                                                    
Ground robots, such as the iRobot PackBot, have saved hundreds of lives in Iraq and Afghanistan by helping soldiers safely inspect and disarm improvised explosive devices (IEDs) (Figure 1). However, even state-of-the-art robot control systems fail to approach the adaptive, versatile mobility demonstrated by humans and animals on an everyday basis. In order to extend the applicability of ground robots to a wider range of missions, fundamental advances are needed ...


Real-Time Driving Simulation of Magneto-Rheological Active Damper Stryker Suspension
24 Oct 2011
10 pages
Authors: Michael G Megiveron; Amandeep Singh; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI                                                    
Real-time driving simulations are an important tool for verifying vehicle and vehicle component designs with a driver in the loop. They not only provide a cost effective solution but also an ability to verify designs in a safe and controlled operating environment. A real-time driving experiment has been developed for Stryker to compare the ride and handling performance of a baseline passive suspension to that of a Magneto-Rheological (MR) semi-active ...


Advanced Vehicle Power Technology Alliance Technical Workshop and Operations Report
05 Oct 2011
74 pages
Authors: Grace Bochenek; Patrick Davis; Steven Eick; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI                                                    
The Advanced Vehicle Power Technology Alliance (AVPTA) between the Department of Energy (DOE) and the Department of the Army (DA) underscores the urgency for energy security; in particular, an emphasis on developing advanced technologies that enable military ground vehicles to become significantly more energy efficient. Individually and collaboratively, the DOE and DA have a long history of successfully developing innovative vehicle technologies. This new alliance will accelerate the generation of ...


Effective Task Assignment and Motion Planning for Complex UAV Operations
Sep 2011
38 pages
Authors: Tal Y Shima; TECHNION - ISRAEL INST OF TECH HAIFA FACULTY OF AEROSPACE ENGINEERING                                                    
This two years research effort was concerned with the efficient solution of combinatorial optimization problems that arise in the task assignment and motion planning of unmanned aerial vehicles in complex operations. In the first year of the research we have concentrated on the high level task assignment problem. A genetic algorithm that utilizes process algebra for coding of solution chromosomes and for defining evolutionary based operators was presented. The algorithm ...


Analysis and Load Rating of Pre-flex Composite Beams
Sep 2011
89 pages
Authors: Genock Portela; Ulises Barajas; Jose A Albarran-Garcia; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS GEOTECHNICAL AND STRUCTURES LAB                                                    
This report describes a methodology for analysis and load rating of pre-flex beams subjected to vehicular and military loads. The methodology is based on service limits for different loading stages. The analysis is divided into an initial stage of pre-flexion of the non-composite beam, followed by the release and subsequent states of loading of a composite beam. Creep and shrinkage effects are considered in the analysis adopting Giacomo and Maninni ...


Design Requirements for Weaponizing Man-Portable UAS in Support of Counter-Sniper Operations
Sep 2011
125 pages
Authors: Derek J Snyder; NAVAL POSTGRADUATE SCHOOL MONTEREY CA                                                    
The sniper is a highly successful tool used by the enemy to create both physical and psychological effects on U.S. and Coalition forces. A single enemy sniper can pin down an entire company-sized element for an extended period of time, resulting in measurable disruptions in operations. This threat is as old as the rifle itself but has been somewhat shadowed by the proliferation of the Improvised Explosive Device (IED) over ...


The Use of Autonomous Vehicles for Spatially Measuring Mean Velocity Profiles in Rivers and Estuaries
Sep 2011
51 pages
Authors: Christopher K Tuggle; NAVAL POSTGRADUATE SCHOOL MONTEREY CA                                                    
Autonomous vehicles (AVs) are commonly used in oceanic and more recently estuarine and riverine environments because they are small, versatile, efficient, moving platforms equipped with a suite of instruments for measuring environmental conditions. However, moving vessel observations, particularly those associated with Acoustic Doppler Current Profiler (ADCP) measurements, can be problematic owing to instrument noise, flow fluctuations, and spatial variability. A range of ADCPs manufactured by different companies were integrated onto ...


A Hybrid Approach to Tactical Vehicles
Sep 2011
123 pages
Authors: Mark D Fingerholz; NAVAL POSTGRADUATE SCHOOL MONTEREY CA                                                    
Combat operations are suffering from unnecessarily high fuel demand which degrades capability, exposes support operations to greater risk than necessary, and increases operations and support costs. This thesis describes the current suite of hybrid drivetrain technologies, evaluates their effectiveness in a tactical environment, and suggests an architecture that reduces fuel consumption while maintaining performance against mobility, transportability, survivability, and safety requirements. This thesis includes a comprehensive analysis of nine power ...


Tracked Vehicle Dynamics Modeling and Simulation Methodology, with Control, using RecurDyn Software Package
Sep 2011
13 pages
Authors: Joseph Raymond; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI                                                    
Many Army vehicles require tracks in order to meet the tough mobility requirements for the Army mission profile. Modeling and Simulation (M&S) provides a large cost-savings and offers a quick turn-around when addressing vehicle performance issues. Once a baseline model is built for a given system, the model can be changed quickly to address different load or usage profiles and to determine the overall affect on the vehicle and its ...


Scalable Power-Component Models for Concept Testing
17 AUG 2011
9 pages
Authors: Michael S. Mazzola; G. M. Molen; Stephen Phillips; Matthew Young; Charles Billberry; Angela Card; James Gafford; Denise Kramer; Michael Pozolo; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI                                                    
This paper describes next generation modeling tools to solve a basic problem of concept analysis, which is the lack of component models that realistically estimate the performance of technology that has yet to be fully reduced to specific products. Three important classes of electric power components essential to future Army vehicles are addressed: integrated electric machines, battery energy storage, and traction motor drives. Behavior models are delivered in a common ...


Force Projection Technology Overview
12 Aug 2011
9 pages
Authors: Percy Kirklin; Frederick O Balling; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI                                                    
The Force Projection Technology (FPT) Mission serves as the DoD responsible agent for all ground fuels and lubricants specifications. It is the lead lab for water supply and wastewater treatment. It is also the software national depository authority for the US Army on military load classification for bridges, ferries, rafts, and vehicles. They execute total life cycle engineering for: fuel handing and quality surveillance equipment, water purifications, handling and quality ...


Sensitivity Studies of Particle Emissions and Transport Around a Moving Vehicle
09 AUG 2011
12 pages
Authors: Xiaoling Tong; Edward A. Luke; Robert E. Smith; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI                                                    
The paper will provide representative simulations of particle transport around a vehicle in order to investigate some of the issues related to the accurate prediction of emission and transport of particles induced by a moving vehicle with a transverse blowing wind. Special treatments in boundary conditions and wall law function are discussed and applied to maintain the shape of atmospheric boundary layer wind velocity profile. For the vehicle, we adopt ...


Development of High Fidelity Mobility Simulation of an Autonomous Vehicle in an Off-Road Scenario Using Integrated Sensor, Controller, and Multi-Body Dynamics
04 Aug 2011
28 pages
Authors: Jayakumar; Smith; Ross; Jategaonkar; Konarzewski; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI                                                    
An Advanced Battery Management System for Lithium Ion Batteries
AUG 2011
8 pages
Authors: Bruce Pilvelait; Carlos Rentel; Gregory L. Plett; Mike Marcel; Dave Carmen; CREARE INC HANOVER NH                                                    
This paper describes the development of a Battery Management System (BMS) State of Charge/Health (SOC/SOH) algorithm that was developed and proven for three different lithium ion based cell chemistries (nanophosphate, lithium manganese oxide, lithium iron phosphate). In addition, a universal BMS architecture based on this algorithm was developed that can support other chemistries, capacities, and formats. Algorithm performance was compared to actual data in the laboratory environment and also to ...


A User-Friendly Tool for Evaluating the Thermal Response of High Power Battery Packaging Alternatives
AUG 2011
10 pages
Authors: Stanley Jones; John Mendoza; George Frazier; Sonya Zanardelli; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI                                                    
The SAIC Battery Thermal Solver is a tool that allows for the evaluation of the thermal response under a variety of cell types, loading conditions and packaging alternatives for the battery designer, manufacturer, or system integrator. Developed with a user-friendly interface, the Battery Thermal Solver allows for a number of simulations to be performed. This paper discusses the capabilities of the Battery Thermal Solver Tool through a thorough discussion of ...


Select Papers. Volume 1
Aug 2011
246 pages
Authors: ARMY RESEARCH LAB ADELPHI MD                                                    
The ARL Summer Student Research Symposium is an ARL Director s Award Program for all the students participating in various summer scholarship and contract activities across ARL. The goal of the program is to recognize and publicize exceptional achievements made by the students and their mentors in the support of Army science. All college undergraduate and graduate students receiving research appointments and conducting summer studies at ARL are automatically enrolled ...


Analysis of Air Breathing Hall-Effect Thruster (Preprint)
Aug 2011
Authors: Leonid Pekker; Michael Keidar; ENGINEERING RESEARCH AND CONSULTING INC (ERC INC) EDWARDS AFB CA                                                    
The principle idea of using air breathing electrical propulsion for a vehicle flying at orbital speed on the edge of Earth's atmosphere is examined. In this paper, we present a simple model of a Hall Effect thruster in which the propellant is an ambient air. The required lengths of the thruster chamber, the magnetic fields, the thrust, and other parameters of an ideal air breathing Hall Effect thruster are calculated ...


Assessment and Quantification of Cumulative Impacts of Training and Land Management Practices on Military Installations
19 JUL 2011
10 pages
Authors: Paul Ayers; TENNESSEE UNIV KNOXVILLE                                                    
Military vehicle maneuvers remove vegetation and increase the potential for soil erosion. Quantifying the vegetation removed during military maneuvers is needed to assist land managers in maintaining the environmental integrity of the training area. A terrain-vehicle impact model was used to predict terrain impacts (disturbed width and impact severity), based on vehicle properties, operating characteristics and soil strength properties. The cumulative impact width (CIW), a product of the disturbed width ...


Joint Assault Bridge
19 JUL 2011
81 pages
Authors: David W. Marck; Don Paskulovich; Donna Morgan; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI                                                    
Conference Guidance: Purpose: To provide potential offerors program related information; To improve the development of a formal solicitation; To promote a Small Business subcontracting network; Conference is for informational purposes only. Our intent is to clearly communicate our strategy. Respond to your questions regarding the solicitation. Proposal shall be based on final RFP posted to TACOM website, including amendments.


Lessons Learned in Performing Technology Readiness Assessment (TRA) for the Milestone (MS) B Review of an Acquisition Category (ACAT)1D Vehicle Program
18 JUL 2011
7 pages
Authors: Jerome Tzau; Anthony Dolan; Matt Withun; Richard Goetz; Brett Johnson; Johnathon Putrus; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI                                                    
One of the biggest challenges in developing TRA is the determination of the critical technology elements (CTEs). This paper outlines a systematic process used to identify all potential technologies developed by the contractors during the Technology Development (TD) Phase and applies criteria for selection of CTEs. To reduce the subjectivity in the assessment, the relevant technical requirements for each CTE that are important to the customers will be established. These ...


Diagnostic Health Monitoring System Development for Army Vehicle Reliability
Jul 2011
Authors: Douglas Adams; Tiffany DiPetta; David Loester; PURDUE UNIV LAFAYETTE IN                                                    
Current maintenance schedules for ground vehicles are determined largely based on reliability predictions of a population of vehicles under anticipated operational loads. This approach leads to unnecessary maintenance and, in some cases, in-field failures depending on differences in the usage of individual vehicles. Condition-based maintenance is scheduled instead according to the condition of each vehicle to reduce the risk of failure and maintenance costs. However, on-board instrumentation for acquiring, processing, ...


Evaluation of Suppression of Hydroprocessed Renewable Jet (HRJ) Fuel Fires with Aqueous Film Forming Foam (AFFF)
Jul 2011
54 pages
Authors: Steven P Wells; Brent M Pickett; Howard T Mayfield; APPLIED RESEARCH ASSOCIATES INC TYNDALL AFB FL                                                    
Bio-oil derived hydroprocessed renewable jet (HRJ) fuels are alternative fuels that are being evaluated for use in United States Air Force (USAF) aircraft and support equipment and vehicles (SE&V). As with any new weapons system or other type of potential fire threat, the fire protection safety risk to the first responder must be established. This program was designed to determine if Military Specification MIL-F-24385F (MIL-SPEC) Aqueous Film Forming Foam (AFFF) ...


Use of Mahalanobis Distance for Detecting Outliers and Outlier Clusters in Markedly Non-Normal Data: A Vehicular Traffic Example
JUN 2011
60 pages
Authors: Rik Warren; Robert F. Smith; Anne K. Cybenko; SRA INTERNATIONAL INC DAYTON OH                                                    
Modeling the behavior of interacting humans in routine but complex activities has many challenges, not the least of which is that humans can be both purposive and negligent, and further can encounter unexpected environmental hazards requiring fast action. The challenge is to characterize and model the humdrum routine while at the same time capturing the deviations and anomalies which arise from time to time. Because of the disruptive impact that ...


Functionalized Nano and Micro Structured Composite Coatings
Jun 2011
61 pages
Authors: Igor Luzinov; Konstantin Kornev; CLEMSON UNIV SC SCHOOL OF MATERIALS SCIENCE AND ENGINEERING                                                    
Current methods of decontaminating Chemical Warfare Agents (CWA) contaminated equipment need significant improvement. To this end, the major objective of this work was to conduct research on development of effective nano and micro structured composite coatings capable to collect and decontaminate the chemical agents. In addition, the coating is intended to minimize the contamination cross-section of a coated vehicle. During the project we developed major components required to build effective ...


Ultra Wideband (UWB) Synchronous Impulse Reconstruction (SIRE) Radar Upgrade Assessment Field Experiment
Apr 2011
32 pages
Authors: Brian Stanton; Francois Koenig; Greg Mazzaro; Marc Ressler; Kelly Sherbondy; Gregory Smith; ARMY RESEARCH LAB ADELPHI MD                                                    
Several upgrades have been incorporated into the Ultra Wideband (UWB) Synchronous Impulse Reconstruction (SIRE) radar, which includes: (a) Augmented Reality, (b) antenna array mounting structure, (c) electronic switch and electro-mechanical relay, and (d) low noise amplifiers. The purpose of the experiment is to assess UWB SIRE radar upgrades.


Optical Flow-Based Odometry for Underground Tunnel Exploration
MAR 2011
63 pages
Authors: Terra Kier; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT                                                    
As military operations in degraded or GPS-denied environments continue to increase in frequency and importance, there is an increased necessity to be able to determine precision location within these environments. Furthermore, authorities are finding a record number of tunnels along the U.S.-Mexico border; therefore, underground tunnel characterization is becoming a high priority for U.S. Homeland Security as well. This thesis investigates the performance of a new image registration technique based ...


An Interactive Design Space Supporting Development of Vehicle Architecture Concept Models
Jan 2011
11 pages
Authors: Gary Osborne; Glen Prater; Rostyslav Lesiv; David Lamb; Matthew Castanier; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI                                                    
Due to a lack of suitable analysis tools, automotive engineers are often forced to forego quantitative optimization early in the development process, when fundamental decisions establishing vehicle architecture are made. This lack of tools arises because traditional analysis models require detailed geometric descriptions of components and assembly joints in order to yield accurate results, but this information is simply not available early in the development cycle. Optimization taking place later ...


Vehicle Concept Model Abstractions for Integrated Geometric, Inertial, Rigid Body, Powertrain, and FE Analysis
Jan 2011
12 pages
Authors: Gary Osborne; Glen Prater; Rostyslav Lesiv; David Lamb; Matthew Castanier; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI                                                    
Vehicle analysis models of any kind have their basis in some type of physical representation of the design domain. Rather than describing three-dimensional continua of a collection of components as is done in detail-level CAD models, an architecture-level abstraction describes fundamental function and arrangement, while capturing just enough physical detail to be used as the basis for a meaningful design space representation and eventually, analyses that permit architecture assessment. The ...


Strategic Insights. Volume 10, Issue 2, Summer 2011
Jan 2011
60 pages
Authors: NAVAL POSTGRADUATE SCHOOL MONTEREY CA CENTER FOR CONTEMPORARY CONFLICT                                                    
Partial contents: PFLP and its Offshoots, Assassination by Remotely Piloted Vehicle, Article Governance in Pakitan's FATA and Point/Counterpoint Has the death Bin Laden made the US safer?.


Robotic Skies: Intelligence, Surveillance, Reconnaissance and the Strategic Defense of Japan
DEC 2010
21 pages
Authors: Patrick M. Cronin; Paul S. Giarra; CENTER FOR A NEW AMERICAN SECURITY WASHINGTON DC                                                    
This paper argues that ISR is important for Japan's strategic defense in particular and for regional security in general. The introduction examines the role of ISR capabilities. The second section analyzes Japan's shifting strategic environment and growing need for improved ISR capabilities and integration, including ground-based analysis and use of the information that is retrieved. The third section examines the evolution of ISR technologies, with a focus on recent advances ...


Advancing the Behavior Modeling and Visualization of Entities in the Ground Vehicle Simulation Laboratory
10 Nov 2010
Authors: Daniel W Carruth; John McGinley; Chris Mikulski; Andrey Shvartsman; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI                                                    
TARDEC Ground Vehicle Simulation Laboratory (GVSL) designs and executes soldier-in-the-loop distributed virtual simulations. Goal: to improve Army ground vehicles systems. Recent experiments include obtaining physiological data on situational awareness decision-making and create vehicle usage profiles (duty cycles) for hybrid electric combat vehicles.


End-to-end System level M&S Tool for Underbody Blast Events
Nov 2010
23 pages
Authors: Ravi Thyagarajan; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI                                                    
The underbody blast event is a very complex and highly transient phenomenon very short duration and extremely high G values. Blast modeling and simulation tools, processes and best practices are leveraged from the automotive industry to assess blast survivability vehicle performance. Occupant injury risk assessment tools and injury metrics for underbody blast events are based off of automotive standards and need further investigation / validation. Current M&S tools are beneficial ...


Development of a Strategy for Simulating Blast-Vehicle Interactions
SEP 2010
142 pages
Authors: D. Thompson; E. Luke; III Newman  J. C.; J. M. Janus; E. Blades; X. Tong; C. Moore; J. Kang; MISSISSIPPI STATE UNIV MISSISSIPPI STATE CENTER FOR ADVANCED VEHICULAR SYSTEMS                                                    
This report describes research and development activities supported by contract W56HZV-08-C-0126, which was funded under the SimBRS program, to develop a strategy to perform high-fidelity simulations of blast-vehicle interactions including complex phenomena such as detonation, coupled fluid-structure interactions, and non-linear structural response to severe, time-dependent pressure loads and debris impact. The contract leveraged ongoing development efforts for the high-fidelity flow solver Loci/CHEM to produce a fully Eulerian numerical capability to ...


Force and Moment Plots from Pacejka 2002 Magic Formula Tire Model Coefficients
SEP 2010
40 pages
Authors: Jill E. Goryca; ARMY TANK-AUTOMOTIVE AND ARMAMENTS COMMAND WARREN MI                                                    
One of the important aspects in vehicle dynamics simulation is accurate modeling of the tire-road interaction forces because the movement of the vehicle depends on the forces and moments applied to the tires. Many vehicle simulation programs such as MSC Software ADAMS, Altair HyperWorks MotionSolve, etc. use the Magic Formula (MF) developed by Pacejka to model tires. In order to use these applications more effectively, a tool was developed using ...


Time-Dependent Reliability/Durability Methodologies for Acquisition, Maintenance, and Operation of Vehicle Systems
11 May 2010
31 pages
Authors: Amandeep Singh; Zissimos P Mourelatos; Jing Li; OAKLAND UNIV ROCHESTER MI DEPT OF MECHANICAL ENGINEERING                                                    
Published studies and audits have documented that reliability has a significant impact on mission effectiveness, logistics effectiveness, and life-cycle costs. Purpose of this research is to develop methodologies to assess and improve the reliability / durability of vehicle systems, then use those methodologies in design for lifecycle cost and preventive maintenance. Random Process leads to Time-Dependent Reliability. Time-dependent reliability methodologies have been developed using math-based models.


Predicting Snap-through of a Thin-walled Panel due to Thermal and Acoustic Loads
May 2010
16 pages
Authors: R  S Miskovish; Parthiv Shah; Stephen M Spottswood; ATA ENGINEERING INC SAN DIEGO CA                                                    
Under contract from Wright-Patterson AFB (WPAFB), ATA Engineering, Inc., (ATA) has performed a study of snap-through buckling of a panel on a hypersonic vehicle under the influence of fluctuating pressures. Snap-through occurs when the elastic stiffness of the structure is cancelled by the effects of compressive stress within the structure. If this effect causes the structure to suddenly displace a large amount in a direction normal to the load direction ...


AMMPHS Trial Report CFB Valcartier, 28 September to 9 October 2009 (Compte Rendu D'Essais pour le AMMPHS BFC Valcartier du 28 Septembre au 9 Octobre 2009)
Mar 2010
143 pages
Authors: C Ste  Croix; A Morton; H Angel; HUMANSYSTEMS INC GUELPH (ONTARIO)                                                    
A total of eight different AMMPHS prototype mandible systems were assessed as part of a SIHS helmet trial held at Canadian Forces Bases (CFB) Valcartier from September 28 to October 9, 2009. Twelve participants were required to undertake a battery of human factors tests while wearing the current in-service helmet (CG634) or one of the AMMPHS prototype mandibles in a blocked repeated measures design. During each test, the order of ...


Dynamics and Control of a Biomimetic Vehicle Using Biased Wingbeat Forcing Functions: Part 2 - Controller (Postprint)
Jan 2010
38 pages
Authors: David B Doman; Michael W Oppenheimer; David O Sigthorsson; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE                                                    
A control strategy is proposed for a minimally-actuated flapping-wing micro air-vehicle (FWMAV). The proposed vehicle is similar to the Harvard RoboFly that accomplished the first takeoff of an insect scale flapping wing aircraft, except that it is equipped with independently actuated wings. Using the derivation of the aerodynamic forces and moments from Part I, a control allocation strategy and a feedback control law are designed that enable the vehicle to ...


Dynamics and Control of a Biomimetic Vehicle Using Biased Wingbeat Forcing Functions: Part 1 - Aerodynamic Model (Postprint)
Jan 2010
36 pages
Authors: David B Doman; Michael W Oppenheimer; David O Sigthorsson; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE                                                    
An aerodynamic model, for a minimally actuated flapping wing micro air vehicle (FWMAV), is derived from blade element theory. The vehicle considered in this work is similar to the Harvard RoboFly, except that it is equipped with independently actuated wings. A blade element-based approach is used to compute both instantaneous and cycle-averaged forces and moments for a specific type of wingbeat motion that enables nearly decoupled, multi-degree-of-freedom control of the ...


Ultrathin Direct Atomic Layer Deposition on Composite Electrodes for Highly Durable and Safe Li-Ion Batteries
Jan 2010
6 pages
Authors: Yoon Seok Jung; Andrew S Cavanagh; Leah A Riley; Sun-Ho Kang; Anne C Dillon; Markus D Groner; Steven M George; Se-Hee Lee; COLORADO UNIV AT BOULDER                                                    
In order to employ Li-ion batteries (LIBs) in next-generation hybrid electric and/or plug-in hybrid electric vehicles (HEVs and PHEVs), LIBs must satisfy many requirements: electrodes with long lifetimes (fabricated from inexpensive environmentally benign materials), stability over a wide temperature range, high energy density, and high rate capability. Establishing long-term durability while operating at realistic temperatures (5000 charge-depleting cycles, 15 year calendar life, and a range from -46 deg C to ...


Unmanned Aircraft Systems as Wingmen
2010
12 pages
Authors: Richard D. Garcia; Laura Barnes; MaryAnne Fields; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD                                                    
This paper introduces a method to integrate Unmanned Aircraft Systems (UASs) into a highly functional manned/unmanned team through the design and implementation of 3D distributed formation/flight control algorithms with the goal to act as wingmen for a manned aircraft. The proposed algorithms are designed to increase UAS autonomy dynamically modify formations, utilize standard operating formations to reduce pilot resistance to integration, and support splinter groups for surveillance and/or as safeguards ...


The California Central Coast Research Partnership: Building Relationships, Partnerships, and Paradigms for University-Industry Research Collaboration
18-Dec-2009
755 pages
Authors: M Black; C Clark; T Cardinal; G Bekey; J Bellardo; S Barjami; K Abney; S Opava; D Derickson; D Clague; CALIFORNIA POLYTECHNIC STATE UNIV SAN LUIS OBISPO                                                    
The primary purpose of tins project is to carry out applied research and development projects and build research capacity in areas of interest to the Department of Defense and the Office of Naval Research. Research areas include communications, computing, command and control, sensors, coastal monitoring, force protection and performance, bio- and chemical-hazard detection and mitigation, vulnerability assessment, new materials and devices, data acquisition, optical and radar imaging, autonomous vehicles and ...


Geo-Based Inter-Domain Routing (GIDR) Protocol for MANETS
Oct-2009
8 pages
Authors: Mario Gerla; Abhishek Tiwari; Biao Zhou; Konglin Zhu; You Lu; Anurag Ganguli; Bao-hong Shen; David Krzysiak; UTOPIA COMPRESSION CORP LOS ANGELES CA                                                    
Inter-domain routing for MANETs (Mobile Ad Hoc Networks) draws increasing attention because of military and vehicular applications. The existing Border Gateway Protocol (BGP) is the de facto inter-domain routing protocol for the Internet. But BGP is not applicable to MANETs because the BGP design is based on a static Internet which does not support dynamic discovery of members, and cannot scale to mobile, dynamic topology environments. The proposed geo-based inter-domain ...


Afghanistan Security Forces Fund Phase III - Accountability for Equipment Purchased for the Afghanistan National Police
22-Sep-2009
38 pages
Authors: INSPECTOR GENERAL DEPT OF DEFENSE ARLINGTON VA                                                    
We determined whether the Combined Security Transition Command-Afghanistan (CSTC-A) could account for equipment purchased with the Afghanistan Security Forces (ASF) Fund to support the Afghanistan National Police (ANP). We also determined whether CSTC-A properly transferred accountability for the equipment to the ANP. What We Found We identified internal control weaknesses in accounting for equipment provided to the ANP. Specifically, CSTC-A did not have adequate receiving and inventory controls and could ...


Sensor Placement for Detection of Cracks in Structures Exhibiting Nonlinear Dynamics
09-Sep-2009
26 pages
Authors: Matthew P Castanier; David J Gorsich; Bogdan I Epureanu; Akira Saito; Sung Kwon Hong; TACOM RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI                                                    
Designing a Sensorless Torque Estimator for Direct Torque Control of an Induction Motor
Sep-2009
87 pages
Authors: Athanasios Tsoutsas; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING                                                    
Nowadays, transportation is a major cause of air pollution. Electric propulsion could replace the internal combustion engines of automobiles and reduce the emission of exhaust gases. The propulsion of an electric vehicle requires the design of an accurate electromagnetic torque estimator and an efficient control system in order to control the speed of the vehicle. This concept is conveyed through this thesis. An electromagnetic torque calculator of an induction motor ...


Indoor Navigation for Unmanned Aerial Vehicles
13-Aug-2009
30 pages
Authors: Sobers; D M Jr; Girish Chowdhary; Eric N Johnson; GEORGIA INST OF TECH ATLANTA                                                    
The ability for vehicles to navigate unknown environments is critical for autonomous operation. Mapping of a vehicle's environment and self-localization within that environment are especially difficult for an Unmanned Aerial Vehicle (UAV) due to the complexity of UAV attitude and motion dynamics, as well as interference from external influences such as wind. By using a stable vehicle platform and taking advantage of the geometric structure typical of most indoor environments, ...


Dynamics and Control of a Minimally Actuated Biomimetic Vehicle: Part 1 - Aerodynamic Model (Postprint)
Aug 2009
27 pages
Authors: David B Doman; Michael W Oppenheimer; David O Sigthorsson; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE                                                    
An aerodynamic model for the forces and moments acting on a minimally actuated flapping wing micro air vehicle (FWMAV) are derived from blade element theory. The proposed vehicle is similar to the Harvard RoboFly that accomplished the first takeoff of an insect scale flapping wing aircraft, except that it is equipped with independently actuated wings and the vehicle center-of-gravity can be manipulated for control purposes. Using a blade element-based approach, ...


Dynamics and Control of a Minimally Actuated Biomimetic Vehicle: Part 2 - Control (Postprint)
Aug 2009
25 pages
Authors: David B Doman; Michael W Oppenheimer; David O Sigthorsson; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE                                                    
vA control strategy is proposed for a minimally-actuated flapping-wing micro air-vehicle (FWMAV). The proposed vehicle is similar to the Harvard RoboFly that accomplished the first takeoff of an insect scale flapping wing aircraft, except that it is equipped with independently actuated wings and the vehicle center-of-gravity can be manipulated for control purposes. Using the results from the derivation of the aerodynamic forces and moments from Part I, a control allocation ...



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Very High Performance High Nitrogen Energetic Ingredients and Energetic Polymers for Structural Components
31 Dec 2011
75 pages
Authors: Robson F Storey; Rodney L Willer; C  G Campbell; UNIVERSITY OF SOUTHERN MISSISSIPPI HATTIESBURG                                                    
This project investigated new energetic materials for use with a triazole cured binder system. Research was conducted in five main areas: 1) energetic materials based on the spiro[4.4]nonane system, 2) completion of our work on the 4,4- (methylenediimino)bis-1,2,5-oxadiazole-3-carboxylic acid and carboxamide, 3) a re-examination of the reaction of glyoxal with 3,4-diamino[1,2,5]oxadiazole, 4) synthesis and chemistry of 3-hydroxymethyl-4-amino[1,2,5]oxadiazole and 5) work on energetic polymers for structural components.


Dynamic Structural Flexible-Beam Response to a Moving Barge Train Impact Force Time-History Using Impact_Beam
Aug 2011
303 pages
Authors: Robert M Ebeling; Abdul N Mohamed; Jose R Arroyo; Barry C White; Ralph W Strom; Bruce C Barker; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS INFORMATION TECHNOLOGY LAB                                                    
To design simply-supported, flexible impact beams spanning between cells or bents for lock approach walls, a dynamic structural analysis of the beam under impact time-history loads for design- specific barge trains is required. At several locks, this flexible structural feature is the primary structural member resisting the glancing-blow impact event of a barge train as it aligns itself with a lock. This technical report describes an engineering methodology used to ...


Structural Health Diagnosis and Prognostics Using Fatique and Crack Growth Monitoring
12 APR 2011
21 pages
Authors: Daniel Kujawski; Muralidhar K. Ghantasala; Subash Gokanakonda; Shabbir Hussain; WESTERN MICHIGAN UNIV KALAMAZOO DEPT OF MECHANICAL AND AERONAUTICAL ENGINEERING AND COMPUTER SCIENCE                                                    
Fatigue damage sensing and crack propagation monitoring of any structure is a prerequisite for reliable and effective structural health monitoring. This paper, discusses the role of two different sensors, i.e., crack propagation (CP) and fatigue damage (FD) sensors in structural health monitoring. The CP sensor is capable of detecting crack initiation and subsequent propagation within the structural component that essentially constitutes a diagnostics approach. The FD sensor monitors the actual ...


Non-Destructive Evaluation of Aircraft Structural Components and Composite Materials at DSTO Using Sonic Thermography
FEB 2011
70 pages
Authors: Kelly A. Tsoi; Nik Rajic; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION VICTORIA (AUSTRALIA) AIR VEHICLES DIV                                                    
This report outlines the results of a series of non-destructive evaluations using sonic thermography. It examines the detection of closed cracks, delaminations, impact damage and other defects in a variety of structural components and composite materials used in aircraft structures. The results confirm the efficacy of the technique and highlight its potential to fill some of the capability gaps that currently exist in relation to challenging non-destructive inspection problems.


Determination of Critical Flaw Size in Gun Launch 40-mm GRENADE
DEC 2010
28 pages
Authors: N. Payne; J. Jablonksi; J. Cordes; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL NJ MUNITIONS ENGINEERING TECHNOLOGY CENTER                                                    
The inspection and screening of flaws in high explosive filled gun fire projectiles are crucial to ensure safety for soldiers using these items. In-bore failure of structural components are sure to produce lethal consequences; therefore, it is of great importance to determine what the maximum permissible crack size is for a given component coming off the production floor. The analytical process to determine critical flaw size occurs in two stages. ...


Use of Fly Ash in the Mitigation of Alkali-Silica Reaction in Concrete
12 NOV 2010
130 pages
Authors: Kelsea Schwing; OREGON STATE UNIV CORVALLIS DEPT OF CIVIL ENGINEERING                                                    
Alkali-silica reaction (ASR) is one of the leading causes of concrete deterioration throughout the world, and affects both structural and non-structural elements. Despite strong research efforts since its discovery by Stanton in the late 1930s, this deteriorating reaction is still not clearly understood nor are proper preventative measures effectively applied to reduce the risk of ASR. Central to the debate is a lack of clear understanding about how supplementary cementing ...


Environmental Variation in Contamination Outgas Testing of a Composite Material
15-Mar-2009
30 pages
Authors: Keith R Olson; Kelsey A Folgner; AEROSPACE CORP EL SEGUNDO CA                                                    
Molecular contamination degrades sensitive spacecraft surfaces and can adversely affect the useful life of a spacecraft. In order to accurately predict mission performance, a thorough understanding of the emission and condensation of potential spacecraft contaminants is necessary. Potential sources of contamination include composite materials that are often used for large structural components. The large mass of these composite structures can represent the largest outgassing source on a spacecraft. This report ...


Finite Element Model Optimization of the FalconSAT-5 Structural Engineering Model
Mar-2009
124 pages
Authors: Cole C Doupe; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT                                                    
Space launch vehicles produce tremendously harsh environments for their payloads. One of the worse contributors to this harsh environment is vibration. Launch vehicle contractors require accurate dynamic models in order to perform coupled loads analyses with each payload to mitigate risks. Accurate predictions of the dynamic response of the payload are not achieved easily. The Finite Element (FE) method has proven to be the best approach in creating accurate dynamic ...


Recommended Processes and Best Practices for Nondestructive Inspection (NDI) of Safety-Of-Flight Structures
Oct-2008
97 pages
Authors: John Brausch; David Campbell; Lawrence Butkus; Tommy Mullis; Michael Paulk; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE                                                    
This document outlines critical processes, guidelines, and best practices for the nondestructive inspection (NDI) of safety-of-flight aircraft (SOF) structures. More specifically, this document provides rationale for requiring rigor in the definition, development, demonstration and implementation of NDI for United States Air Force (USAF) SOF aircraft structures. Topics include the critical role of NDI in the Aircraft Structural Integrity Program, defining inspection requirements, procedure development, capability estimation, procedure qualification, training, certification, ...


Evaluation of Nanocomposites as Lightweight Electronic Enclosures for Satellites' Applications
JUN 2008
98 pages
Authors: Benjamin T. Harder; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT                                                    
The United States military is exploring the use of nanocomposite materials for satellite structural applications. Current composite spacecraft structures are nonconductive and must have expensive shielding materials applied in order to protect the spacecraft from catastrophic damage that can be caused by electromagnetic interference (EMI) and/or electrostatic discharge (ESD) which are characteristics of the space environment. Conductive nanocomposites are being developed for spacecraft structures that will provide ESD and EMI ...


Improved Navy Maintenance Through Corrosion-Fatigue Assessment Program
11-Mar-2008
237 pages
Authors: Wally Hoppe; DAYTON UNIV RESEARCH INST (URDI) OH STRUCTURAL INTEGRITY DIV                                                    
The High-Strength Steel Corrosion-Fatigue Assessment program was designed to ensure reliability and supportability of current and emerging Naval aircraft by providing requisite engineering support to evaluate issues relevant to corrosion-fatigue of aircraft components. In this multi-year, multi-contract program, tools have been developed to assist in the establishment of maintenance options for corroded components. Experimental and analytical tools have been developed to classify corrosion in a manner tied to a reduction ...


Two Stellar Components in the Halo of the Milky Way
13 DEC 2007
8 pages
Authors: Daniela Carollo; Timothy C. Beers; Young-Sun Lee; Masashi Chiba; John E. Norris; Ronald Wilhelm; Thirupathi Sivarani; Brian Marsteller; Jeffrey A. Munn; Coryn A. Bailer-Jones; NAVAL OBSERVATORY FLAGSTAFF AZ                                                    
The halo of the Milky Way provides unique elemental abundance and kinematic information on the first objects to form in the Universe, and this information can be used to tightly constrain models of galaxy formation and evolution. Although the halo was once considered a single component, evidence for its dichotomy has slowly emerged in recent years from inspection of small samples of halo objects. Here we show that the halo ...


Improved Control Authority in Flexible Structures Using Stiffness Variation
JUN 2007
11 pages
Authors: Ranjan Mukherjee; Steven W. Shaw; MICHIGAN STATE UNIV EAST LANSING                                                    
This research investigated control authority enhancement in structural systems through methodical stiffness variation. Our early work focused on stiffness variation in a cantilever beam under the application of a buckling-type end force and control designs based on switching of the end force. Towards the end of the project, our modeling, control, and experimental methods were extended to truss-like structures. An important extension of the work was tuning of beam-type MEMS ...


Feasibility Investigation into Strengthening of Timber Bridge Stringers
MAY 2007
142 pages
Authors: Anthony J. Lamanna; Arda Akbiyik; James C. Ray; Gerardo I. Velazquez; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS GEOTECHNICAL AND STRUCTURES LAB                                                    
The majority of timber bridges in the United States are nearing the end of their service life. They exhibit several types of damage, which occurs in their structural elements such as timber stringers. The most commonly encountered damage type in timber stringers in bridge structures is horizontal splits. Researchers investigated the feasibility of repairing timber stringers that showed signs of horizontal splitting along the length of the member. Timber stringer ...


FEM Modeling of Guided Wave Behavior in Integrally Stiffened Plate Structures
APR 2007
12 pages
Authors: Steve A. Martin; Kumar V. Jata; NDE COMPUTATIONAL CONSULTANTS DUBLIN OH                                                    
Structural health monitoring (SHM) technologies, which use integrated sensing for damage detection, are expected to improve system reliability, availability, and operational cost. Guided waves can propagate great distances while experiencing low attenuation. They have been successfully used for damage detection in structures of relatively low geometric complexity such as plates and cylindrical pipes. The use of guided waves for this purpose becomes increasingly difficult as the geometric complexity of the ...


Thermo-mechanical Analysis of Ground-based Directed Energy Weapons on Satellites and Intercontinental Ballistic Missiles
SEP 2006
122 pages
Authors: Georgios Mantzouris; NAVAL POSTGRADUATE SCHOOL MONTEREY CA                                                    
Thermo mechanical modeling and simulation of a satellite and intercontinental ballistic missile assumes importance due to the increased interest in assessing the potential of such attacks. Effective and innovative methods are sought in assessing the structural integrity of such structural components. In this study, we present modeling and simulation aspects of two generic models loaded by high energy laser beam. We present an application of MSC software in modeling thermo-mechanical ...


State of the Art and Future Trends in the Development of Thermal Barrier Coating Systems
01-May-2006
Authors: Prakash C Patnaik; XIAO HUANG; Jogender Singh; NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO)                                                    
Thermal barrier coating (TBC) systems are the most effective means of protecting structural components from damage caused by excessive temperature and corrosive/erosive environments. The applications for TBCs range from gas turbines and power generators to space and military equipment. As the durability and performance of high temperature components rely more and more on TBCs, the capability of these coatings has become an important variable in the design and development of ...


Development of a Novel, Passively Deployed Roll-Out Solar Array
MAR 2006
10 pages
Authors: Douglas Campbell; Rory Barrett; Mark S. Lake; Larry Adams; Erik Abramson; Mark R. Scherbarth; Jeffry S. Welsh; Gregg Freebury; Neal Beidleman; Jamie Abbot; COMPOSITE TECHNOLOGY DEVELOPMENT INC LAFAYETTE CO                                                    
Advanced solar arrays capable of generating greater than 50 kW of total power, at power densities greater than 250 W/kg, are required for many future Air Force missions. The largest heritage systems are limited to less than 15 kW of total power, at roughly 50 W/kg. The Roll Out and Passively Deployed Array (RAPDAR) design will demonstrate the feasibility of 50 kW, 250 W/kg-class solar array systems through an innovative ...


Failure of Ductile Materials and Components at High Rates of Loading
16 SEP 2005
9 pages
Authors: L. B. Freund; BROWN UNIV  PROVIDENCE RI DIV OF ENGINEERING                                                    
The report summarizes progress in understanding plastic strain localization leading to fracture and fragmentation as it occurs in ductile structural components, primarily metals, and on the role of elastomer coatings in suppressing plastic strain localization. The main finding is that the elastomer becomes effective when the bifurcation strain of the ductile metal at which necks begin here's this or to form is roughly comparable to the strain at which the ...


A New Space Robot End-Effector for On-Orbit Reflector Assembly
13 JUL 2005
8 pages
Authors: Shin-ichiro Nishida; Hisashi Hirabayashi; Tsuneo Yoshikawa; JAPAN AEROSPACE EXPLORATION AGENCY CHOFU (JAPAN) ADVANCED SPACE TECHNOLOGY RESEARCH GROUP                                                    
In Earth orbit, astronomical observations are possible, free from absorption or disturbances by the Earth's atmosphere. Therefore, some large space telescopes and large space radio telescopes are planned for the future. Launch vehicle payload bay diameters impose severe restrictions on the sizes of these telescopes, and so, structures larger than the payload bay have to be deployed or assembled in orbit. Structures assembled in orbit may have a finer surface ...


Design and Ground-Testing of an Inflatable-Rigidizable Structure Experiment in Preparation for Space Flight
JUN 2005
114 pages
Authors: Chad R. Moeller; AIR FORCE INST OF TECH  WRIGHT-PATTERSON AFB OH  SCHOOL OF ENGINEERING AND MANAGEMENT                                                    
As the demand for larger space structures increases, complications arise including physical dimensions, weight, and launch costs. These constraints have forced the space industry to look for smaller, more lightweight, and cost-effective solutions. Future antennas, solar sails, sun shields, and other structures have the potential to be exponentially larger than their launch envelopes. Current research in this area is focused on the use of inflatable, rigidizable structures to reduce payload ...


Electrochemical Study of Corrosion Phenomena in Zirconium Alloys
JUN 2005
134 pages
Authors: Nicole M. Treeman; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF NUCLEAR ENGINEERING                                                    
Shadow corrosion of zirconium alloy fuel cladding in BWR environments, the phenomenon in which accelerated corrosion is experienced when the cladding surface is in close proximity to other metals, has become a potentially life-limiting issue for BWR fuel. Recent results from experimentation at MIT, Halden, and Studvik suggest that a galvanic coupling drives the phenomenon between the cladding and the adjacent material. However, the actual processes involved are not understood. ...


Use of Epidermolysis Bullosa Biomarkers in Models of Vesicant Injury
JUN 2005
39 pages
Authors: Donald R. Gerecke; Carol L. Sabourin; RUTGERS - THE STATE UNIV NEW BRUNSWICKNJ                                                    
The chemical warfare agent sulfur mustard (HD) produces a delayed inflammatory response followed by blister formation in skin of exposed individuals. There is a similarity between HD-induced skin injury and the skin disease Epidermolysis Bullosa (EB) in both the morphology of the damage and the structural components involved. Both HD-induced injury and EB are believed to involve matrix metalloproteinases (MMPs), which play key roles in the disruption of connective tissue ...


Reactive Hyperbranched Polymers as Toughening Processing Aids for Composite Matrices
09 MAY 2005
11 pages
Authors: Patrick T. Mather; CONNECTICUT UNIV STORRS DEPT OF POLYMER PROGRAM AND CHEMICAL ENGINEERING                                                    
The overall objective of this proposal is to develop and study for transition new low viscosity thermoset additives - hyperbranched polymers (HBPs) - for use in composites needed for emerging space-based Air Force applications. Specifically, we are studying and developing hyperbranched polymers for use as a new low-viscosity thermoset/thermoplastic additives, which have enormouos applications in rigid spacecraft structures. The particular projects included: (i) Modification of high performance thermoplastics by non-reactive ...


RF MEMS Improvement Program
MAR 2005
9 pages
Authors: Eliot D. Cohen; L-3 GOVERNMENT SERVICES INC ROME NY                                                    
The work performed under this task was in support of DARPA Special Projects Office (SPO) Micro Electro Mechanical Systems (MEMS) switch development efforts. The MEMS programs supported were developed and supervised by various DARPA/SPO program managers. During 2000 and early 2001, it became increasingly apparent that the RF MEMS switches and phase shifters being fabricated by all of the contractors working under various DARPA/SPO programs, that were directed toward using ...


Analysing Blast and Fragment Penetration Effects on Composite Helicopter Structures
MAR 2005
Authors: C. van't Hof; K. Herlaar; J. M. Luyten; M. J. van der Jagt; TNO DEFENSE SECURITY AND SAFETY RIJSWIJK (NETHERLANDS)                                                    
Sandwich structures become increasingly important as structural parts in helicopters. This does not only have effect on the way of construction but also on the vulnerability of the helicopter. The last decades the threat of helicopters has increased in military circumstances. Consequently the helicopters will be exposed to weapon effects like high blast loads and fragment impact more frequently. Moreover the blast load becomes more important because the threat comes ...


Numerical Optimization of Multifunctional Components
17 AUG 2004
9 pages
Authors: Anthony T. Patera; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF MECHANICAL ENGINEERING                                                    
Engineering components are increasingly complex in composition and structure and increasingly multifunctional. Indeed, it is only through complexity and multifunctionality that the defense industry can satisfy the stringent performance requirements associated with critical defense applications. However, these complex, multifunctional systems no longer admit intuitive analysis of trade-off considerations. Industries must pursue optimization, including optimal choice of material, configuration, and deployment to realize the potential of these new approaches. The essential ...


Future Years Defense Program (FYDP) Structure
APR 2004
2161 pages
Authors: OFFICE OF THE SECRETARY OF DEFENSE WASHINGTON DC DIRECTOR PROGRAM ANALYSIS AND EVALUATION                                                    
This Handbook lists the alphanumeric codes and titles of the two principal structural elements of the FYDP: Program Element (PE) and Resource Identification Code (RIC). The Handbook also contains definitions for FYDP PEs and the alphanumeric codes for the DoD Components that have resources in the FYDP. These Component codes are subsidiary field in the PE codes. In addition, the Handbook states some of the major roles that guide the ...


Tri-Directional Seismic Analysis of an Unreinforced Masonry Building with Flexible Diaphragms
APR 2004
91 pages
Authors: Steven C. Sweeney; Matthew A. Horney; Sarah L. Orton; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL                                                    
To understand the susceptibility that buildings with flexible diaphragm systems have to earthquakes, their seismic response to tri-axial base motions is assessed. The research centers on a tri-directional analytical study of a two-story half-scale unreinforced masonry (URM) structure. The study investigates the effect of tri-axial base motions on response of the structure. It determines how individual component behavior, such as a pier or floor diaphragm, affects the behavior of the ...


Neural Composite Materials
30 DEC 2003
15 pages
Authors: Mannur J. Sundaresan; Mark J. Schmiz; NORTH CAROLINA UNIV AT GREENSBORO                                                    
An embeddable structural health monitoring system has been developed to measure acoustic emission signals generated by incipient damage in Army structures. The structural health monitoring system is built upon two parallel approaches that mimic signal processing in biological nerve cells. One approach uses a continuous sensor formed by a series connection of piezoelectric sensor nodes and a local signal processor to detect damage. The other uses an array type of ...


Signal Processing Applied to the Dolphin-Based Sonar System
01-Sep-2003
8 pages
Authors: Dorian Houser; Steve Martin; Mike Pillips; Eric Bauer; Tim Herrin; Patrick Moore; BIOMIMETICA SANTEE CA                                                    
The bottlenose dolphin has evolved a unique system of biosonar, or echolocation, that allows it to exploit a visually limited littoral niche. The effectiveness of dolphin echolocation at finding and identifying submerged objects is unsurpassed by man-made hardware systems built for similar tasks. It has become a model system from which to draw hardware and signal processing design concepts and is the basis for the development of biomimetic mine-hunting systems ...


Air Force Fast Center for Lightweight Structural Materials and Processing
14 AUG 2003
106 pages
Authors: Paul O. Biney; Jianren Zhou; Laura Carson; PRAIRIE VIEW A AND M UNIV TX                                                    
The sixth year of the FAST Center at Prairie View A&M University was mainly devoted to the continuation of research in polymer processing and characterization, and mechanical and microstructural characterization, and a study of environmental effects on the properties of composites.


Focused Topical Session: Oxide/Oxide Ceramics and Composites Meeting; Annual Cocoa Beach Conference (27th) and Exposition on Advanced Ceramics and Composites Held in Cocoa Beach on 26-31 January 2003
15 JUN 2003
170 pages
Authors: A. Sayir; CASE WESTERN RESERVE UNIV CLEVELAND OH                                                    
Advanced materials are usually composite materials for structural components to carry loads and/or functional components to accomplish specific tasks. Oxide ceramic, oxide fiber reinforced ceramic composites and in-situ composites stand out as those which provide best properties in oxidizing environment. The oxide materials are essential to withstand severe loads in the oxidizing environment a severe conditions. The oxide ceramics and oxide composites is a crucial research area because it's importance ...


Environmentally Assisted Cracking Properties of AA7249 Extrusions for Aerospace Applications
02 MAY 2003
64 pages
Authors: Kristen L. Deffenbaugh; NAVAL ACADEMY ANNAPOLIS MD                                                    
The Development of new military aerospace platforms is costly and time-consuming. Therefore, it is important that current platforms maximize their service lifetime. Exposure to environmental elements, particularly seawater, is especially troublesome to the Navy because it shortens required aircraft lifetime. The P-3C is an example of a versatile aircraft whose lifetime has been extended to the point that environmental attacks is now becoming a significant concern. Structural components in the ...


iMAST Quarterly, Number 4, 2003
Jan-2003
9 pages
Authors: APPLIED RESEARCH LABORATORY STATE COLLEGE PA                                                    
Collarless construction techniques are briefly discussed in this quarterly. The feature article focuses on planning and designing a shipbuilding facility. Electric Boat Corporation vision for improving the fabrication of major submarine sections at its Quonset Point, RI, facility. This vision includes not only the investment in the new buildings and facilities, but includes a commitment to the up front planning required to incorporate process improvements and define future operational details. ...


Idempotent Vector Design for Standard Assembly of Biobricks
2003
12 pages
Authors: Tom Knight; MASSACHUSETTS INST OF TECH CAMBRIDGE ARTIFICIAL INTELLIGENCE LAB                                                    
The lack of standardization in assembly techniques for DNA sequences forces each DNA assembly reaction to be both an experimental tool for addressing the current research topic, and an experiment in and of itself. One of our goals is to replace this ad hoc experimental design with a set of standard and reliable engineering mechanisms to remove much of the tedium and surprise during assembly of genetic components into larger ...


Damping and Stiffness Enhancement in Composite Systems with Carbon Nanotubes Films
2003
6 pages
Authors: E. A. Lass; N. A. Koratkar; P. M. Ajayan; B. Q. Wei; P. Keblinski; RENSSELAER POLYTECHNIC INST TROY NY DEPT OF MECHANICAL AEROSPACE AND NUCLEARENGINEERING                                                    
Structural damping is an essential design parameter for many engineering applications. We demonstrate here the potential for the use of multi-walled carbon nanotube films in structural systems where vibrational energy dissipation is important. These films can provide a light weight, minimally intrusive alternative to conventional damping materials such as visco-elastic polymers. In addition, because of their multifaceted properties, damping materials utilizing carbon nanotubes are expected to be superior to traditional ...


Long-Term Survival of Enteric Microorganisms in Frozen Wastewater
OCT 2002
64 pages
Authors: Louise V. Parker; C. J. Martel; ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB                                                    
Microorganisms that are found in domestic wastewater and that can cause illness in humans include bacteria viruses protozoan cysts and helminth ova. This literature review attempts to determine whether organisms contained in a frozen sewage bulb in the Antarctic ice would survive for decades. This review briefly examines the structural differences between these organisms; examines the susceptibility of these organisms to chilling freezing thawing and frozen storage and the effect ...


Workshop on Benchmark Experiments in Contact Mechanics as Applied to Gas Turbine Engines Held in West Palm Beach on 12-13 May 2002
02 SEP 2002
11 pages
Authors: Jerry H. Griffin; D. Ewins; CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF MECHANICAL ENGINEERING                                                    
An international workshop on benchmarks in contact mechanics and friction damping was held on the 12th and 13th of May in conjunction with the DoD sponsored HCP Conference in West Palm Beach, FL. The workshop was organized by Dr. J.H. Griffin, a Professor at Carnegie Mellon University in Pittsburgh, and Dr. E. Ewins, a Professor at Imperial College in London. The workshop was a follow-on to a workshop held last ...


Induction Bonding for Structural Composite Tubes
SEP 2002
48 pages
Authors: Eric D. Wetzel; William A. Spurgeon; Christian J. Yungwirth; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE                                                    
Large structural composite tubes, prototype components for a proposed U.S. Navy application, are bonded by induction curing of an engineering adhesive. Magnetic powder is used as the susceptor material and is directly incorporated into the adhesive prior to processing. Different induction power supplies, coil designs, and adhesive formulations are investigated. Final demonstration runs bond 9-in-long, 3-in-diameter axisymmetric bondlines in 15 min. These results demonstrate for the first time the successful ...


Corrosion-Induced Multiple Site Damage
31 JUL 2002
12 pages
Authors: Karl Sieradzki; Dusan Krajcinovic; ARIZONA STATE UNIV TEMPE DEPT OF MECHANICAL AND AEROSPACE ENGINEERING                                                    
This research focuses on three key issues related to the nucleation and growth of corrosion fatigue cracks in fuselage fastener holes. (1) The identification of the precise mechanisms responsible for corrosion damage in Al alloy 2024-T3 in the bare, clad, and painted condition. (2) The transitional behavior from corrosion damage to fatigue crack growth nucleation and subsequent short crack growth, and (3) a real-time statistically based model of damage evolution ...


Adipocyte Differentiation: Relationship to Breast Cancer
APR 2002
26 pages
Authors: Berdar E. Bulun; ILLINOIS UNIV AT CHICAGO                                                    
We hypothesize that breast malignant epithelial cells interact with surrounding stroma to provide biochemical and structural support for tumor tissue. Specifically, malignant epithelial cells block the differentiation of surrounding adipose fibroblasts through cytokines. Additional epithelial factors strikingly induce aromatase expression in these undifferentiated fibroblasts via switching aromatase gene promoter use from the physiologically used promoter 1.4 to aberrantly activated promoter II. During this entire grant period, we have accomplished all ...


Effects of Shot-Peening on High Cycle Fretting Fatigue Behavior of Ti- 6Al-4V
26 MAR 2002
Authors: Halil I. Yuksel; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT                                                    
Effects of Shot-peening on High Cycle Fretting Fatigue behavior of Ti-6Al-4V were investigated. Experiments were performed with 6.35 mm thick specimens which provided S/N curves. After the tests, it was observed that the specimens failed near the trailing edge of contact. Scanning Electron Microscopy showed that cracks initiated on the contact surface for 6.35 mm, and at the depth of specimen ranging from 200 to 300 microns for 3.81 mm ...


Investigating the Deformation and Failure Mechanisms in Bi-Material Systems Under Tension
11 MAR 2002
3 pages
Authors: C. T. Liu; Fu-Pen Chiang; AIR FORCE RESEARCH LAB EDWARDS AFB CA SPACE AND MISSILE PROPULSION DIV                                                    
Bonded sandwich laminates are being used widely in various industries. They have been successfully used in aircraft and space structures, pipes, chemical tanks, ship hulls, and in other structural applications in which a high strength-to-weight ratio is a desirable feature. Joining structural components with adhesives provides a number of advantages. Bonding does not require rivet holes, which are stress raisers and may cause premature failure either under static or fatigue ...


Innovative Local-Global Methods for Wing Structural Design
27 FEB 2002
45 pages
Authors: Zafer Gurdal; VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF AEROSPACE AND OCEAN ENGINEERING                                                    
Only a couple months have elapsed since the last annual report, so there is nothing significant to report for those intervening months. The technical accomplishments and outcomes from the grant support have been documented in the three annual reports, which are attached as appendices. We provided here only summary statistics for the three year period, and a summary of the most significant accomplishments.


Innovative Local-Global Methods for Aircraft Structural Design
FEB 2002
5 pages
Authors: Rafael Haftka; FLORIDA UNIV GAINESVILLE DEPT OF AEROSPACE ENGINEERING MECHANICS AND ENGINEERING SCIENCE                                                    
Global-local design of large structures presents a great challenge to structural designers to coordinate the optimization of major structural components (wing or fuselage) with optimization of individual panel details. Moreover, the continuity of the adjacent designs in terms of their geometric and material variables presents a serious manufacturing difficulty for the large structure. The research developed methodology, computational infrastructure and algorithms with sound theoretical basis to extend industrial ad hoc ...


SEISMIC-ACOUSTIC HYBRID SENSOR & ITS APPLICATIONS,
FEB 2002
Authors: JOHN SLEDGE; TEST WING ( 46TH) EGLIN AFB FL                                                    
(U) THIS PAPER ADDRESSES THE NEED FOR INSTRUMENTATION TO GATHER SEISMIC-ACOUSTIC SIGNATURES UNDER UNUSUAL CONDITIONS REQUIRING THE USE OF LOW COST, SIMPLE DESIGN, ROBUST SENSORS. IN SOME INSTANCES THE SENSORS MUST ADAPT AND MOLD TO THE ENVIRONMENTAL MEDIUM TO PROVIDE PROPER COUPLING FOR DATA COLLECTION PURPOSES. THE PAPER EXPLAINS HOW THE IDEA OF A HYBRID SEISMIC-ACOUSTIC SENSOR ORIGINATED AND INITIALLY IMPLEMENTED. TESTING OF FIELD EVENTS ARE REPORTED TO DEMONSTRATE THE ...


SHAPE BIASED LOW POWER SPIN DEPENDENT TUNNELING MAGNETIC FIELD SENSORS,
FEB 2002
Authors: Mark Tondra; Zhenghong Qian; Dexin Wang; Cathy Nordman; JOHN ANDERSON; ALBRECHT JANDER; BOB SINCLAIR; JAMES DAUGHTON; NVE CORP EDEN PRAIRIE MN                                                    
(U) THIS PAPER ADDRESSES THE USE OF SPIN DEPENDENT TUNNELING (SDT) DEVICES AS CANDIDATES FOR INCLUSION IN A NUMBER OF UNATTENDED GROUND SENSOR APPLICATIONS. ONE APPROACH TO THEIR USE IS SHAPE BIASING, WHICH MEANS THAT THE PHYSICAL LAYOUT OF THE SDT SENSING ELEMENTS IS SUCH THAT THE MAGNETIZATION OF A SENSING FILE IS CORRECT EVEN WHEN NO BIASING FIELD IS APPLIED. THE AUTHORS DECLARE THAT SENSORS HAVE BEEN FABRICATED USING ...


Alleviation of Buffet on the Twin-Tail Assemblies of High-Performance Aircraft (aasert)
31 OCT 2001
19 pages
Authors: Ali H. Nayfeh; Dean T. Mook; VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF ENGINEERING SCIENCE AND MECHANICS                                                    
We carried out experiments on a structural dynamic model of the twin- tail assembly of the F-15 fighter built by Professor Sathya Hanagud of Georgia Tech. The model was placed on a 250 lb shaker and subjected to a principal parametric excitation. We fixed the excitation amplitude and varied the excitation frequency around 18 Hz. For the same excitation amplitude and frequency, we found five possible responses depending on the ...


Computational Mechanics of the Full-Scale and Model-Scale Roll-On, Roll- Off (RORO) Stern Ramp and Experimental Modal Analysis of the Model-Scale Ramp and Support
JUN 2001
173 pages
Authors: James E. Buckley; NAVAL POSTGRADUATE SCHOOL MONTEREY CA                                                    
It has been determined that current stern ramp designs lack adequate structural integrity during Sea State Three roll-on, roll-off (RORO) operations. Therefore, passive isolation between the stern ramp and the roll-on, roll-off discharge facility (RRDF) is being investigated as a means of reducing ramp stress levels. A coupled hydro-structural simulation model of the combined ship- ramp-RRDF is under development in order to evaluate candidate isolator technologies. This thesis documents a ...



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Robotics Research for Cybersecurity
24 Jan 2012
4 pages
Authors: Wei-Min Shen; UNIVERSITY OF SOUTHERN CALIFORNIA MARINA DEL REY                                                    
The overall objective of this project is to conduct a comprehensive study of robotics research in the context of cybersecurity. The specific objectives are as follows: (1) Create a realistic cybersecurity test scenario that captures the unique and increasingly difficult robotics research challenges; (2) Survey the state-of-the-art in applicable research and technology; (3) Identify and analyze the salient research challenges with a primary focus on computational sciences; (4) Define multiple ...


Buildings in the 21st Century: Ultra-Efficient and Business-Smart Strategies for Transforming the Nation's Buildings
29 Nov 2011
25 pages
Authors: Roland Risser; DEPARTMENT OF ENERGY WASHINGTON DC OFFICE OF ENERGY EFFICIENCY AND RENEWABLE ENERGY                                                    
The presentation will provide an overview of the cutting-edge efficiency strategies and technologies being employed to design new and renovate existing buildings - and show how federally sponsored research and development supports this progress.


R&D of Energetic Ionic Liquids
Nov 2011
23 pages
Authors: Tom Hawkins; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE                                                    
This presentation reviews current research and development of energetic ionic liquids, including state-of-the-art fuel, advanced chemical propulsion for spacecraft, history of energetic ionic liquids, and proposes greener chemical propulsion via energetic ionic liquids in advanced monopropellants


Spaceborne Ocean Intelligence Network: SOIN - Fiscal Year 10/11 Year-End Summary
Oct 2011
76 pages
Authors: Darryl Williams; Brendan DeTracey; Paris W Vachon; John Wolfe; Will Perrie; Pierre Larouche; Chris Jones; Joe Buckley; Sean Pecknold; Cristina Tollefsen; DEFENCE RESEARCH AND DEVELOPMENT CANADA OTTAWA (ONTARIO)                                                    
The Spaceborne Ocean Intelligence Network (SOIN) is a six-year research and operational development project that addresses barriers to developing and implementing oceanographic applications derived from Earth-observation sensors such as RADARSAT-2 and MODIS, capabilities that will be provided by the Polar Epsilon Project, combined with existing AVHRR and MERIS sensor data. The project is divided into two phases. The recently terminated three-year Phase I focused on developing state-of-the-art sea-surface temperature and ...


The ROMS IAS Data Assimilation and Prediction System: Quantifying Uncertainty
13 Sep 2011
5 pages
Authors: Andrew M Moore; Brian S Powell; CALIFORNIA UNIV SANTA CRUZ DEPT OF OCEAN SCIENCES                                                    
The main objectives of this project were: (i) to assess the impact of observations on ocean state estimates and the ensuing forecasts; (ii) to quantify the expected errors in 4-dimensional variational (4D-Var) ocean circulation estimates: and (iii) to develop multimodel ensemble and superensemble methods for ocean models. The primary tool used in this project was the Regional Ocean Modeling System (ROMS). To address the aforementioned goals and objectives, we used ...


Improved Basis Functions for Dynamic Calibration of Semi-Empirical Thermospheric Models
Sep 2011
10 pages
Authors: Eric K Sutton; Samuel B Cable; Chin S Lin; Frank A Marcos; AIR FORCE RESEARCH LAB KIRTLAND AFB NM SPACE VEHICLES DIRECTORATE                                                    
State-of-the-art satellite drag models require upgrades to meet operational Precision Orbit Determination requirements for collision avoidance, reentry predictions and catalog maintenance. Accurate model representations of the upper atmosphere are not currently possible without the use of data assimilation, or model calibration. Due to incomplete global data sampling in the thermosphere, such calibration has only been successfully demonstrated by fitting the available data to a low-dimensional model. The High Accuracy Satellite ...


Development of Nanoporous Carbide-Derived Carbon Electrodes for High-Performance Lithium-Ion Batteries
Sep 2011
93 pages
Authors: Kamryn M Sakamoto; NAVAL POSTGRADUATE SCHOOL MONTEREY CA                                                    
Lithium ion batteries are the state-of-the-art power sources for portable electronic devices and, due to their superior energy and power densities, are promising candidates for the demanding energy storage applications of the U.S. Navy and other branches of the military. While graphitic carbon is currently the most common anode material in lithium ion batteries, it suffers from low specific capacity (372 mAh/g) and poor power characteristics. In contrast, amorphous carbons ...


Light Tactical Wheeled Vehicles - A Fuel Efficient Soultion Enabled by Boosted Down Sized Engines Managed with Open Control Systems
AUG 2011
5 pages
Authors: Gustav Johnson; AVL POWERTRAIN ENGINEERING INC PLYMOUTH MI                                                    
Modern medium and heavy duty Commercial Off The Shelf (COTS) diesel engines take advantage of state-of-the-art technologies to deliver excellent performance while meeting the most stringent emissions legislation. While some of these technologies offer significant advantages in terms of engine efficiency, performance and weight versus traditional military engines, others are driven purely by the need to meet emissions standards. In order to successfully adapt these COTS engines for military use ...


Applicability of Visual Analytics to Defence and Security Operations
JUN 2011
51 pages
Authors: Valerie Lavigne; Denis Gouin; DEFENCE RESEARCH AND DEVELOPMENT CANADA VALCARTIER (QUEBEC)                                                    
In the context of modern defence and security operations, analysts are faced with a continuously growing set of information of different nature which causes significant information overload problems and prevent developing good situation awareness. Fortunately, Visual Analytics (VA) has emerged as an efficient way of handling and making sense of massive data sets by exploiting interactive visualization technologies and human cognitive abilities. Defence R&D Canada has conducted a review of ...


The Economics of Managed Print and Imaging Services
JUN 2011
91 pages
Authors: Carl R. Blazek; Jesse K. Taijeron; NAVAL POSTGRADUATE SCHOOL MONTEREY CA                                                    
To facilitate a baseline economic assessment, the concept of Managed Print and Imaging Services (MPIS) is introduced first. Next, a transferable process to determine the most economical print and imaging option is outlined so that NAVSISA, as well as other organizations, can utilize it. A baseline economic assessment of NAVSISA s current nonstandardized procurement and use of print and imaging services follows. This data is then compared to the total ...


Segmented Mirror Telescope Model and Simulation
JUN 2011
69 pages
Authors: Travis W. Axtell; NAVAL POSTGRADUATE SCHOOL MONTEREY CA                                                    
The Segmented Mirror Telescope (SMT) housed at the Naval Postgraduate School is a unique, state-of-the-art optical instrument built to explore new technologies needed for future space-based telescopes. A discrete Fourier transform wavefront reconstruction technique developed at Lawrence Livermore National Laboratory is discussed in this thesis as applied to a hexagonal aperture. A Fourier domain implementation of a spatial-frequency modal controller for a simple spring-mass model of a deformable mirror surface ...


Quantification of Protein Signatures in Archived Human Prostate Tissues Using Shotgun Proteomic Methods
Jun 2011
8 pages
Authors: Michael Wright; IOWA UNIV IOWA CITY                                                    
Biomarkers that robustly predict the metastatic potential of localized CaP are sorely needed to effectively treat localized CaP patients that pose the greatest risk of developing significant CaP. Biomarkers specific to significant CaP are also necessary if more effective drugs are going to be developed that can target and cure patients afflicted by this deadly disease. Proteins represent some of the most powerful molecular biomarkers to human disease such as ...


Development of a Multileaf Collimator for Proton Radiotherapy
Jun 2011
54 pages
Authors: W  G McKenna; PENNSYLVANIA UNIV PHILADELPHIA                                                    
This report describes the sixth year of a project to design and construct multileaf collimators (MLC) to be used in proton radiotherapy, the fifth year of the project to develop scanned beam technology for proton radiotherapy, and the fourth year of the project to develop image guided treatment protocols for proton therapy. This research project is a joint collaborative effort between the University of Pennsylvania (HUP) and the Walter Reed ...


The Government Assistance Center: A Vehicle for Transitioning to the Host Government
MAY 2011
75 pages
Authors: Raymond A. Millen; Carolyn Pruitt; ARMY WAR COLL CARLISLE BARRACKS PA PEACEKEEPING AND STABILITY OPERATIONS INST                                                    
Policy-makers and strategists have long recognized that complexity and chaos are common features of the strategic environment, which encompasses both the international and domestic realms. In war, the military seeks to mitigate these features through superb organization and staff-work, among other pursuits. Unfortunately, outside of the military, this same discipline is not applied to other endeavors, such as Security Sector Reform, Disaster Response, and Humanitarian Assistance. In this monograph, Professor ...


Extending Bayesian Logic Programs for Plan Recognition and Machine Reading
MAY 2011
38 pages
Authors: Sindhu V. Raghavan; TEXAS UNIV AT ARLINGTON DEPT OF COMPUTER SCIENCE                                                    
Statistical relational learning (SRL) is the area of machine learning that integrates both first-order logic and probabilistic graphical models. The advantage of these formalisms is that they can handle both uncertainty and structured/relational data. As a result, they are widely used in domains like social network analysis, biological data analysis, and natural language processing. Bayesian Logic Programs (BLPs), which integrate both first-order logic and Bayesian networks are a powerful SRL ...


By Product Synergy Analysis
24 MAR 2011
94 pages
Authors: Francisco Leguiza; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT                                                    
The United States Air Forces generates various waste during the repair and overhaul activities. These wastes can involve hazardous material. Depending on the material, technologies exist or could be readily developed to convert wastes into feed-stock for other processes The old concept of managing material from cradle-to-grave now has evolved into cradle-to-cradle. This concept goes beyond the disposal of waste and can be even more cost-effective than recycling. The objective ...


DoD Biometrics Collaboration Forum 25-27 Jan 2011. Event Report
Mar 2011
Authors: ARMY BIOMETRICS IDENTITY MANAGEMENT AGENCY WASHINGTON DC                                                    
The purpose of the 2011 Biometrics Collaboration Forum (BCF) was to integrate the community of biometrics users within the Department of Defense (DoD) and affiliated agencies. The event was not designed as a series of lectures or updates, but as a collaborative event designed to further biometrics in the DoD. Forum Objectives included: 1) Discussing the status of biometrics endeavors across the DoD 2) Collaborating to identify the highest priority ...


Literature Review of the State of the Art for Graphical User Interfaces (GUI) for a Series of Oil Quality Monitoring Sensors for Shipboard Equipment
Mar 2011
46 pages
Authors: K  J KarisAllen; FACTS ENGINEERING INC HALIFAX (NOVA SCOTIA)                                                    
Over the past several years, DRDC Atlantic has embarked on a program for the evaluation of existing technologies, as well as the development of new technologies for application in platform specific lubricating oil condition monitoring systems. The current study is primarily focused on conducting a literature review of the current state of the art for graphical user interfaces (GUI) with general discussions of background technologies and potential frameworks for developing ...


Landscape Analysis and Algorithm Development for Plateau Plagued Search Spaces
28 FEB 2011
23 pages
Authors: Adele Howe; L. D. Whitley; COLORADO STATE UNIV FORT COLLINS DEPT OF COMPUTER SCIENCE                                                    
Over the last 10 to 20 years, heuristic search in the Operations Research and Artificial Intelligence communities has focused on developing high level general purpose algorithms, such as Tabu Search and Genetic Algorithms. However, understanding of when and why these algorithms perform well still lags. Our project extended the theory of certain combinatorial optimization problems to develop analytical characterizations of portions of search spaces and as the basis for creating ...


Wide Area Detection and Identification of Underwater UXO Using Structural Acoustic Sensors
FEB 2011
86 pages
Authors: J. A. Bucaro; B. H. Houston; H. Simpson; D. Calvo; L. Kraus; T. Yoder; M. Saniga; S. Dey; A. Sarkissian; DEPUTY DIRECTOR OF DEFENSE RESEARCH AND ENGINEERING ARLINGTON VA STRATEGIC ENVIRONMENTAL RESEARCH AND DEVELOPMENT PROGRAM                                                    
This project explored the feasibility and advantages of applying the structural acoustic feature-based technique to the detection and identification of underwater unexploded ordnance, especially for buried targets. In the structural acoustic regime, the echoes are related to the vibrational dynamics of the object, and time-frequency features in the scattered echoes can be used to "fingerprint" and identify the target. The research focused on (1) comprehensive state-of-the-art UXO scattering measurements in ...


SCIPUFF Tangent-Linear/Adjoint Model for Release Source Location from Observational Data
18 JAN 2011
41 pages
Authors: O. O. Oluwole; S. E. Albo; Richard C. Miake-Lye; AERODYNE RESEARCH INC BILLERICA MA                                                    
The threat of atmospheric contamination by hazardous materials remains a high national security concern. There is a strong need for the development of emerging technologies which can significantly advance risk assessment and response capabilities. In this project, Aerodyne Research Inc. (ARI) has developed and demonstrated an algorithm for source estimation, called AIMS ("Aerodyne Inverse Modeling System"). AIMS takes as input all available observational data and optionally any prior knowledge of ...


Engineered Intrinsic Bioremediation of Ammonium Perchlorate in Groundwater
DEC 2010
39 pages
Authors: Andrzej Paszczynski; Ronald Crawford; Thomas Hess; IDAHO UNIV MOSCOW                                                    
A variety of perchlorate remediation technologies are currently commercially available. One of them, biological degradation involves perchlorate reducing bacteria (PRBs), which are widespread in the environment. PRBs have the ability to grow in either the presence or absence of air, provided proper nutrients are available in the environment. Both in situ and ex situ biological treatment systems have already been applied at full scale to treat perchlorate contamination. Implementation of ...


Combining Security Assurance and High Performance in Hostile Environments
NOV 2010
23 pages
Authors: Pierre Capillon; Antoine Casanova; CS COMMUNICATION AND SYSTEMS LE PLESSIS-ROBINSON (FRANCE)                                                    
With growing global bandwidth consumption and increasing cyber-attacks, information security actors are in constant need for scalable, high performance products that still provide a high level of security assurance. The French national project "SHIVA" aims at developing a new security architecture providing multiple services and such performance and security assurance levels. Based on research and development from various fields, this paper presents usages of technologies from the high performance computing ...


Multifunctional Carbon Nanotube-Based Sensors for Damage Detection and Self Healing in Structural Composites
29 OCT 2010
27 pages
Authors: Tsu-Wei Chou; Erik T. Thostenson; DELAWARE UNIV NEWARK                                                    
During the past year of the research program focusing on developing composites with damage sensing and self-healing functionalities based on carbon nanotubes, improvements to the state-of-the-art in nanocomposite processing have been made. In order to accommodate the processing of thick-section composites, an alternative approach to the traditional calandering method of carbon nanotube dispersion has been developed. A fiber sizing agent containing multiwalled carbon nanotubes was used in the processing of ...


Accelerating Biomedical Research in Designing Diagnostic Assays, Drugs, and Vaccines
Oct 2010
11 pages
Authors: Anders Wallqvist; Nela Zavaljevski; Ravi V Satya; Rajkumar Bondugula; Valmik Desai; Xin Hu; Kamal Kumar; Michael S Lee; In-Chul Yeh; Chenggang Yu; ARMY MEDICAL RESEARCH AND MATERIEL COMMAND FORT DETRICK MD TELEMEDICINE AND ADVANCED TECH RESEARCH CENTER                                                    
The US Department of Defense Biotechnology High-Performance Computing Software Applications Institute for Force Health Protection develops state-of-the-art high-performance computing applications that accelerate biomedical research in the development of diagnostic assays, drugs, and vaccines. The BHSAI works together with DoD life scientists to develop and integrate HPC software applications into DoD biomedical research programs.


Advanced Multi-Moment Microphysics for Precipitation and Tropical Cyclone Forecast Improvement within COAMPS
30 SEP 2010
10 pages
Authors: Ming Xue; OKLAHOMA UNIV NORMAN SCHOOL OF METEOROLOGY                                                    
The first major focus of this project is to implement and test a microphysics scheme capable of predicting up to three moments (total number concentration, mass, and the 6th-moment reflectivity factor) of hydrometeor hydrometeor particle size distributions (PSDs) inside the Navy's Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPS). After being implemented within the COAMPS, the scheme will be applied for the first time to tropical cyclone (TC) prediction, and to continental-scale ...


Role of the QBO in Modulating the Influence of the 11 Year Solar Cycle on the Atmosphere Using Constant Forcings
21 Sep 2010
18 pages
Authors: Katja Matthes; Daniel R Marsh; Rolando R Garcia; Douglas E Kinnison; Fabrizio Sassi; Stacy Walters; NAVAL RESEARCH LAB WASHINGTON DC                                                    
We present a set of six 20 year experiments made with a state of the art chemistry-climate model that incorporates the atmosphere from the surface to the lower thermosphere. The response of the middle atmosphere to the 11 year solar cycle, its impact on the troposphere, and especially the role of an externally prescribed stratospheric quasi biennial oscillation (QBO) is investigated with NCAR s Whole Atmosphere Community Climate Model (WACCM3). ...


Overview of Materials R&D at Oak Ridge National Laboratory
23 Aug 2010
28 pages
Authors: Peter F Tortorelli; OAK RIDGE NATIONAL LAB TN MATERIALS SCIENCE AND TECHNOLOGY DIV                                                    
Molecular Dynamics Modeling of Ionic Liquids in Electrospray Propulsion
JUN 2010
126 pages
Authors: Nanako Takahashi; MASSACHUSETTS INST OF TECH CAMBRIDGE                                                    
Micro-propulsion has been studied for many years due to its applications in small-tomedium sized spacecraft for precise satellite attitude control. Electrospray thrusters are promising thrusters built upon the state of the art in micro-technology and with flexible performance in terms of their high efficiency and high specific impulse. One challenge is to investigate in detail the mechanism for ion emission to complement experimental results and understand better how emission occurs ...


Infrared Fibers for Sensors
JUN 2010
3 pages
Authors: NAVAL RESEARCH LAB WASHINGTON DC                                                    
At NRL, we are involved in the research and development of specialty infrared optical fibers, glasses, ceramics, and thin films. We have built world class state-of-the-art facilities for making high purity chemicals and unique optical materials of unequaled quality, which are being exploited in optical devices and systems for Navy and DoD applications. One of the core scientific areas that we have pioneered is based primarily on infrared (IR) transmitting ...


An Integrated Docking Pipeline for the Prediction of Large-Scale Protein-Protein Interactions
Jun 2010
6 pages
Authors: Xin Hu; Michael Lee; Kalam Kumar; Anders Wallqvist; ARMY MEDICAL RESEARCH AND MATERIEL COMMAND FORT DETRICK MD                                                    
Knowledge of the three-dimensional (3D) structures of protein complexes provides a fundamental understanding of biological systems, as well as novel insights for antimicrobial drug and vaccine design. Protein-protein docking is used to predict the 3D structures of protein complexes from their components in silico. In this study, we developed a protein-protein docking pipeline (PPDP) that integrates a variety of state-of-the-art protein docking and structure prediction techniques, providing a systematic platform ...


Investigation of Super Tube Structure and Performance (Postprint)
APR 2010
11 pages
Authors: Quinn Leland; Rengasamy Ponnappan; Lanchao Lin; Edward Mahefkey; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIR/POWER DIV                                                    
A new kind of heat transport device introduced by an inventor is intriguing the heat pipe community for the past several years. This device with the resemblance of the hermetically sealed structure and design of a conventional heat pipe or thermosyphon is claimed as thermally superconductive and offers solid state mode of heat transport. A host of speculations about this claim was emerging among research agencies that included academic and ...


Modeling Change Over Time: Conceptualization, Measurement, Analysis, and Interpretation
12-Nov-2009
15 pages
Authors: David Chan; SINGAPORE MANAGEMENT UNIV                                                    
The objective of this research report is to provide a state-of-the art review of the issues and methods relating to the modeling of change over time. The focus is on the quantitative assessment of the concept of change of time, which includes issues of conceptualization, measurement, data analysis, and interpretation. The rationale and motivation for this research originated from the author's observations (specifically in the past decade in the capacities ...


Towards Complex Abiotic Systems for Chemical and Biological Sensing
Nov-2009
37 pages
Authors: James J Valdes; Erica R Valdes; Donna M Hoffman; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD                                                    
There have been at least two decades of research focused on developing biosensors, which mimic human physiological responses, but most of the work has attempted to couple living cells, their receptors, and even scaffolded tissues to optical or electronic sensors. All these biosensors had limitations imposed upon them by living systems. They required extensive life support and had very limited shelf life. Advances in synthetic biology, materials science, molecular engineering, ...


Grid-Enabled Quantitative Analysis of Breast Cancer
Oct 2009
51 pages
Authors: Andrew R Jamieson; Maryellen L Giger; Karen Drukker; Lorenzo Pesce; Hui Li; Neha Bhooshan; Yading Yuan; CHICAGO UNIV IL                                                    
The long-term goal of this research is to improve breast cancer diagnosis, risk assessment, response assessment, and patient care via the use of large-scale, multi-modality computerized image analysis. The central hypothesis of this research is that large-scale image analysis for breast cancer research will yield improved accuracy and reliability when optimized over multiple features and large multi-modality databases. We designed and executed a pilot study to utilize large scale parallel ...


Particle Deposition onto Enclosure Surfaces
20-Aug-2009
61 pages
Authors: De-Ling Liu; AEROSPACE CORP EL SEGUNDO CA                                                    
In space applications, the main concern of particle deposition arises from the undesirable effects of surface obscuration on contamination-sensitive surfaces. The development of effective mitigation strategies to minimize particulate contamination requires the understanding of particle transport and deposition as well as the associated physical factors affecting the processes. The knowledge gleaned from the state-of-the-art literature review presented here can be applied to an enclosure scale as small as a spacecraft ...


A Review of Methods for Moving Boundary Problems
Jul-2009
27 pages
Authors: C E Kees; M W Farthing; R C Berger; T C Lackey; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB                                                    
State-of-the-art numerical methods for solving moving boundary problems arising from multiphase flow and fluid-structure interaction modeling are reviewed. The emphasis of the review is on robust methods that do not require the mesh to conform to the moving boundary. The impetus for this review is the Coastal and Hydraulics Laboratory's mission in navigation. Accurately predicting the effect of a vessel on a waterway and the vessel motion are required to ...


Exploring the Pathogenic and Therapeutic Implications of Aberrant Splicing in Breast Cancer
JUL 2009
47 pages
Authors: William D. Foulkes; Jacek Majewski; SIR MORTIMER B DAVIS JEWISH GENERAL HOSPITAL MONTREAL (QUEBEC)                                                    
In this proposal, we set out to a) systematically monitor splicing variant profiles in breast cancer susceptibility genes and b) explore the role of alternative splicing in breast chemotherapy using a global strategy. In doing so, we hope to identify and validate candidate splicing variants involved in tumorigenesis using polony digital exon-profiling and functional assays. We are moving forward on four fronts - 1) the barcode methodology is in development; ...


Summary of the Maritime Force Protection Technology Demonstration Project Underwater Threats Component Build 1 Trial
Jun-2009
Authors: Anna Crawford; David Hopkin; D V Crowe; Dana Maxwell; DEFENCE RESEARCH AND DEVELOPMENT ATLANTIC DARTMOUTH (CANADA)                                                    
The Maritime Force Protection Technology Demonstration Project (MFP TDP) is on-going at DRDC Atlantic with the objective of providing advice to the CF on force protection issues by examining requirements, state-of-the-art solutions and capability gaps, while conducting a series of tests and evaluations on developmental and COTS equipment. The Underwater Threats (UW) Component focuses on addressing deficiencies in current CF capabilities for countering underwater threats to Canadian ships in harbours ...


Emergence of Dissipative Structures in Current-Carrying Superconducting Wires (Postprint)
26-May-2009
13 pages
Authors: G A Levin; P N Barnes; J S Bulmer; J P Rodriguez; J A Connors; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE                                                    
We discuss the emergence of a spontaneous temperature and critical current spatial modulation in current-carrying high-temperature superconducting wire. The modulation of the critical current along the wire on a scale of 3-10 mm forces a fraction of the transport current to crisscross the resistive interface between the superconducting film and normal metal stabilizer attached to it. This generates additional heat that allows such structure to be self-sustainable. Stability and the ...


Microstructure-Sensitive Extreme Value Probabilities for High Cycle Fatigue of Ni-Base Superalloy IN100 (Preprint)
Mar-2009
48 pages
Authors: Craig P Przybyla; David L McDowell; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE                                                    
To quantify the effects of interactions between various microstructure attributes on fatigue life in the high cycle fatigue (HCF) regime, we have proposed a new microstructure-sensitive extreme value statistical framework. This framework couples the extreme value distributions of certain fatigue indicator parameters (FIPs) or response functions to the correlated microstructure attributes that exist at the extreme value locations of these FIPs. We demonstrate the application of this statistical framework to ...


Taxonomy for and Analysis of Anonymous Communications Networks
Mar-2009
257 pages
Authors: Douglas Kelly; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT                                                    
Any entity operating in cyberspace is susceptible to debilitating attacks. With cyber attacks intended to gather intelligence and disrupt communications rapidly replacing the threat of conventional and nuclear attacks, a new age of warfare is at hand. In 2003, the United States acknowledged that the speed and anonymity of cyber attacks makes distinguishing among the actions of terrorists, criminals, and nation states difficult. Even President Obama's Cybersecurity Chief-elect feels challenged ...


Applying State-of-the-Art Technologies to Reduce Escape Times from Fires Using Environmental Sensing, Improved Occupant Egress Guidance, and Multiple Communication Protocols
06-Feb-2009
37 pages
Authors: Thomas T Street; Mark H Hammond; Frederick W Williams; NAVAL RESEARCH LAB WASHINGTON DC CHEMISTRY DIV                                                    
In 2006, under contract to the Consumer Product Safety Commission (CPSC), the Naval Research Laboratory (NRL) was tasked with investigating various technology and concepts--such as visual signals and unique audible sounds--that have the potential to improve residential occupant escape in the event of fire. The investigation included an evaluation of the feasibility of incorporating new technologies or concepts to aid escape capabilities and that may improve egress times in residential ...


A Novel Structural Health Management Approach for Steel Bridges
Feb-2009
42 pages
Authors: Vincent Hock; Michael Miller; Richard Lampo; Robert Mason; Lawrence Gintert; Mark Singleton; Steven Sweeney; Keith Chandler; CONCURRENT TECHNOLOGIES CORP JOHNSTOWN PA                                                    
OBJECTIVES: Demonstrate and validate state-of-the-art and remote structural health and corrosion degradation monitoring of steel bridges * Employ system on two subject bridges to greatly reduce risk of catastrophic failure by providing advance warning of growing structural problems caused by corrosion/materials degradation * Subject Bridge 1 -1-20 Bridge, Vicksburg, MS - Steel truss through deck - About 23,000 vehicles per day - Westward movement of bridge piers E-1 and E02 ...


State of the Art Reinforcement for Concrete Bridge Decks
Feb-2009
21 pages
Authors: Vincent Hock; Steven Sweeney; Orange Marshall; Phil Malone; ARMY CORPS OF ENGINEERS OMAHA NE PROTECTIVE DESIGN CENTER                                                    
BACKGROUND: Deck corrosion is problematic and costly for vehicular bridges * The Army alone has more than 1,500 bridges on its installations, with the majority having reinforced concrete decks * FHWA Report RD-01-156 states that approximately one quarter of the direct cost of corrosion of bridges is maintenance and capital costs for concrete decks * FHWA studies have also found that indirect costs to the user due to traffic delays, ...


Unraveling the Nature of Chemical Reactivity of Complex Systems
13-Jan-2009
34 pages
Authors: Kopin Liu; INSTITUTE OF ATOMIC AND MOLECULAR SCIENCES TAIPEI (TAIWAN)                                                    
This project was to gain fundamental understanding of the chemical reactivity of complex systems, specifically the state-correlation of product pairs in chemical reactions of polyatomic molecules, and the salvation dynamics of ion-solvent interactions that are fundamental to many important phenomena in chemistry and biology.


Algorithm Design Study for Bathymetry Fusion-Review of Current State-of-the-art and Recommended Design Approach
30-Dec-2008
30 pages
Authors: Chad A Steed; Pau A Elmore; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS MARINE GEOSCIENCES DIV                                                    
This report reviews current fusion techniques used for bathymetry or other geospatial data, as motivated by the Naval Oceanographic Office's (NAVOCEANO) need for intelligent fustion -- combining two or more data sets in a manner that accounts for data uncertainty -- of gridded and in situ bathymetric data sets. Based on this review, the recommended approach for building new bathymetry fusion algorithms uses loss interpolation to obtain a trend surface ...


Proceedings of the Antenna Applications Symposium (32nd) Held in Monticello, Illinois on 16-18 September 2008. Volume 1
20-Dec-2008
Authors: M W Elsallal; T L Roach; J T Bernhard; D Filipovic; G Potvin; D Fontaine; Y Saito; J-M Rollin; Z Popovic; J D Wolf; L M Paulsen; J B West; R J Mailloux; S G Santarelli; T M Roberts; D Luu; M Stasiowski; D Schaubert; M J Buckley; D H Schaubert; MASSACHUSETTS UNIV AMHERST DEPT OF ELECTRICAL AND COMPUTER ENGINEERING                                                    
The Proceedings of the 2008 Antenna Applications Symposium is a collection of state-of-the art papers relating to antenna arrays, millimeter wave antennas, simulation, and measurement of antennas integrated antennas and antenna bandwidth and radiation improvements.


Proceedings of the Antenna Applications Symposium (32nd) Held in Monticello, Illinois on 16-18 September 2008. Volume 2
20-Dec-2008
Authors: Daniel Schaubert; M W Elsallal; J B West; R J Mailloux; S G Santarelli; T M Roberts; D Luu; M Stasiowski; D Schaubert; M J Buckley; L M Paulsen; J D Wolf; T L Roach; J T Bernhard; D Filipovic; G Potvin; D Fontaine; Y Saito; J-M Rollin; Z Popovic; MASSACHUSETTS UNIV AMHERST DEPT OF ELECTRICAL AND COMPUTER ENGINEERING                                                    
The Proceedings of the 2007 Antenna Applications Symposium is a collection of state-of-the art papers relating to antenna arrays millimeter wave antennas simulation and measurement of antennas integrated antennas and antenna bandwidth and radiation improvements.


A New Kind of Laser Microphone for Photoacoustic Applications
Dec-2008
8 pages
Authors: Feng Jin; Sudhir Trivedi; Chen-Chia Wang; V Swaminathan; Narasimha S Prasad; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL NJ                                                    
We present in this paper a new kind of laser-based microphone device capable of detecting minute displacements of the microphone diaphragm, leading to drastically improved sensitivity in detecting the impinging pressure waves like acoustic waves and water waves over existing state-of-the-art laser and fiber-optic microphones. The drastically improved sensitivity in detecting diaphragm surface displacements of the novel laser microphone leads to niche applications including the photoacoustic detection of molecules and ...



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Methodology Report for H2SModel
Jan 2012
31 pages
Authors: D Oldson; D Crary; B Asgharian; S Watson; G McClellan; APPLIED RESEARCH ASSOCIATES INC ARLINGTON VA                                                    
Hydrogen sulfide is similar in pathophysiology to cyanide in that it binds to mitochondrial cytochrome oxidase. By blocking oxidative respiration at the cellular level its effects are most evident in tissues with high metabolic demand such as the central nervous system, cardiovascular, and respiratory systems. The onset of signs and symptoms is rapid. Hydrogen sulfide also has local irritant effects, particularly upon the nose and membranes of the upper respiratory ...


Accession Medical Standards Analysis & Research Activity (AMSARA) 2011 Annual Report
Jan 2012
118 pages
Authors: David W Niebuhr; Marlene E Gubata; David N Cowan; Caitlin Blandforn; Mikayla Chubb; Xiaoshu Feng; Janice K Gary; Alexis Oetting; Elizabeth Packnett; Amanda Piccirillo; Nadia Urban; Bin Yi; WALTER REED ARMY INST OF RESEARCH SILVER SPRING MD DIV OF PREVENTIVE MEDICINE                                                    
Accession Medical Standards Analysis & Research Activity (AMSARA), mission is to support the development of evidence based medical accession standards for the Department of Defense (DoD) contained in DoD Instruction 6130.4, Medical Standards for Appointment, Enlistment, or Induction in the Armed Forces by guiding improvement of medical and administrative databases and conducting epidemiologic and special studies analyses. Special studies presented in this annual report include analyses of accession medical disqualifications, ...


Report to Congress on Gravesite Accountability Study Findings
22 Dec 2011
54 pages
Authors: DEPARTMENT OF THE ARMY WASHINGTON DC                                                    
Since Secretary of the Army John M. McHugh issued Army Directive 2010-04 on 10 June 2010, the United States Army has instituted comprehensive reforms in the management and oversight of its National Cemeteries Program, putting in place sweeping corrective actions to restore confidence and regain accountability at Arlington National Cemetery (ANC or Cemetery. Secretary McHugh's directive followed completion of three separate Army investigations, each more comprehensive in scope. These efforts ...


Verification and Validation of the Coastal Modeling System. Report 2: CMS-Wave
Dec 2011
112 pages
Authors: Lihwa Lin; Zeki Demirbilek; Rob Thomas; III Rosati  James; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB                                                    
There are four reports documenting the Verification and Validation (V&V) of the Coastal Modeling System (CMS): an executive summary, waves, circulation, and sediment transport/morphodynamics, respectively. This is the second technical report (Report 2) that describes the wave modeling component of the V&V study. The goal of the report was to critically assess both general and special predictive skills of CMS-Wave, a spectral wave model in the CMS developed to address ...


Department of Defense Annual Report on Sexual Harassment and Violence at the Military Service Academies Academic Program Year 2010-2011
Dec 2011
121 pages
Authors: DEPARTMENT OF DEFENSE WASHINGTON DC                                                    
Section 532 of Public Law Number 109-364, the John Warner National Defense Authorization Act for Fiscal Year 2007, requires an assessment at the Military Service Academies (MSA) during each Academic Program Year (APY). This assessment is to determine the effectiveness of the policies, training, and procedures of the academy with respect to sexual harassment and assault involving academy personnel. In APYs beginning in even-numbered years (e.g., APY 10-11), the Report ...


Development of Scoring Procedures for the Performance Based Measurement (PBM) Test: Psychometric and Criterion Validity Investigation
29 Nov 2011
146 pages
Authors: J  B Phillips; O  S Chernyshenko; S Stark; F Drasgow; IV Phillips  H  L; NAVAL MEDICAL RESEARCH UNIT DAYTON WRIGHT-PATTERSON AFB OH                                                    
This report describes findings regarding the scoring of the PBM Test and the relationships of various classical test theory (CTT) and item response theory (IRT) based subtest scores and composites with performance criteria for Navy and Marine Corps student pilots and flight officers. Overall, the IRT analyses indicated that the three parameter logistic model (3PLM) and Samejima's graded response model (SGRM) provided good fit to dichotomously and polytomously scored item-level ...


Integrated Warfighter Biodefense Program (IWBP) - Next Phase
10 Nov 2011
36 pages
Authors: Franklin T Abbott; Ganesh Vaidyanathan; QUANTUM LEAP INNOVATIONS INC NEWARK DE                                                    
The aim of the Integrated Warfighter Biodefense Program (IWBP) is to develop innovative technology that can be deployed to prevent U.S. armed forces from becoming battle or non-battle casualties, and especially to reduce morbidity and mortality throughout the increasingly complex battlespace of current operations. In this summary of the next phase of work on IWBP we report the continued development of novel software that provides a simulation environment for modeling ...


U.S. Naval Academy Officials Did Not Adhere to Contracting and Gift Policies
07 Nov 2011
61 pages
Authors: Patricia A Marsh; INSPECTOR GENERAL DEPT OF DEFENSE ARLINGTON VA                                                    
We determined whether the U.S. Naval Academy (USNA) and its supporting organizations were properly disbursing, recording, accepting, and reporting donations, gifts, and nonappropriated funds (NAPs). From January 1 through December 31, 2010, USNA received 381 monetary gifts, totaling $5.7 million, and 153 in-kind gift donations, valued at $25.1 million. USNA officials did not have adequate processes for disbursing, recording, accepting, and reporting gifts and NAPs. Specifically, the Naval Academy Business ...


Know the Star, Know the Planet. 2. Speckle Interferometry of Exoplanet Host Stars
Nov 2011
7 pages
Authors: Brian D Mason; William I Hartkopf; Deepak Raghavan; John P Subasavage; Jr Roberts  Lewis C; Nils H Turner; Theo A ten Brummelaar; NAVAL OBSERVATORY WASHINGTON DC                                                    
A study of the host stars to exoplanets is important for understanding their environment. To that end, we report new speckle observations of a sample of exoplanet host primaries. The bright exoplanet host HD 8673 (= HIP 6702) is revealed to have a companion, although at this time we cannot definitively establish the companion as physical or optical. The observing lists for planet searches and for these observations have for ...


Criterion-Related Validity of Non-Cognitive Screening Measures among Soldiers with Enlistment Waivers
Nov 2011
74 pages
Authors: Matthew S Fleisher; Dan J Putka; J  D Dressel; HUMAN RESOURCES RESEARCH ORGANIZATION ALEXANDRIA VA                                                    
This report examines the criterion-related validity of the U.S. Army Research Institute for the Behavioral and Social Sciences'(ARI's) on-cognitive measures for predicting various types of performance, attitudinal, and retention criteria for Soldiers who required waivers for entry. We conducted analyses to evaluate the prediction provided by each instrument in isolation, as well as additional prediction beyond that provided by the Armed Forces Qualification Test, or AFQT-he primary cognitive measure used ...


Os Odontoideum: Rare Cervical Lesion
Nov 2011
6 pages
Authors: Kristie A Robson; NAVAL MEDICAL CENTER PORTSMOUTH VA                                                    
We report the case of a 22-year-old Marine who presented to the emergency department, after a martial arts exercise, with transient weakness and numbness in all extremities. Computed tomography cervical spine radiographs revealed os odontoideum. Lateral flexion extension radiographs identified atlanto-axillary instability. This abnormality is rare and can be career ending for military members who do not undergo surgical fusion.


Prioritization and Sensitivity Analysis of the Inhalation/Ocular Hazard of Industrial Chemicals
28 Oct 2011
147 pages
Authors: Thomas E Sutto; NAVAL RESEARCH LAB WASHINGTON DC MATERIALS SCIENCE AND TECHNOLOGY DIV                                                    
This report has been prepared for the Joint Project Manager for Protection (JPM-P) to document the prioritization and sensitivity analysis of the potential inhalation and ocular hazard of industrial chemicals.


Using Impact Modulation to Identify Loose Bolts on a Satellite
21 Oct 2011
140 pages
Authors: Janette Jaques; Doug Adams; PURDUE UNIV LAFAYETTE IN                                                    
This report investigates the use of Impact Modulation (IM) as a means for detecting loose bolts in a satellite structure. First, a two-beam, one-bolt assembly is studied to establish guidelines for implementing IM. Then, theoretical models are developed to provide a basis for applying IM to bolted joints. Two analysis methods for identifying loose bolts within a structure are then proposed. These methods are demonstrated on a three-beam, two-bolt structure; ...


Military Training: DOD's Report on the Sustainability of Training Ranges Meets Annual Reporting Requirements but Could Be Improved
19 Oct 2011
34 pages
Authors: GOVERNMENT ACCOUNTABILITY OFFICE WASHINGTON DC                                                    
Realistic training ranges are one of the most valued assets the military has in preparing its personnel for their missions. Realistic training requires access to areas and environments that closely match the locations where the military may face combat or complex situations. International events, changes in strategy, force structure, base closures, and population growth are increasing the challenges the military faces in training its personnel to be prepared to defend ...


Scalable Heterogeneous Multiagent Teams Through Learning Policy Geometry
Oct 2011
7 pages
Authors: Kenneth O Stanley; UNIVERSITY OF CENTRAL FLORIDA ORLANDO                                                    
This document is the final technical report for Phase II of the DARPA Computer Science Study Group (CSSG) program started by the PI in the year 2008. (Phase II itself began for the PI in 2009.) It follows the reporting requirements specified in the award document for the project.


Toward the Development of a Canadian Less Lethal Weapon Approval Process: A Study of Contemporary Process Models
Oct 2011
72 pages
Authors: Len Goodman; Donna Wood; DEFENCE RESEARCH AND DEVELOPMENT CANADA OTTAWA (ONTARIO) CENTRE FOR SECURITY SCIENCE                                                    
One of the objectives of the Conducted Energy Weapons Strategic Initiative (CEWSI) project is to develop a Canadian approval process that could be applied to emerging less lethal technologies. A contract was let with Alcea Technologies to survey a variety of approval processes with the objective of identifying common elements that could be applied to the Canadian less lethal weapons approval process. The contractor identified the stakeholders, roles and responsibilities, ...


The Resonantly Diode Pumped, Cryogenic Ho3+:YVO4 2.05-Micrometers Laser
Oct 2011
12 pages
Authors: George A Newburgh; Mark Dubinskii; ARMY RESEARCH LAB ADELPHI MD                                                    
We report what is believed to be the first laser operation based on Ho(3+)-doped yttrium orthovanadate (YVO(4)). The cryogenic (77 K) Ho(+3):YVO(4) was resonantly diode-pumped at approximately 1.93 microns to produce up to 1.6 W of continuous wave (CW) output power at approximately 2.054 microns. The laser had a slope efficiency of approximately 38% with respect to absorbed power. We have measured the absorption and stimulated emission cross sections of ...


Low Velocity Sphere Impact of a Soda Lime Silicate Glass
Oct 2011
39 pages
Authors: A  A Wereszczak; E  E Fox; T  G Morrissey; D  J Vuono; OAK RIDGE NATIONAL LAB TN                                                    
This report summarizes TARDEC-sponsored work at Oak Ridge National Laboratory (ORNL) during the FY11 involving low velocity ( 30 m/s or  65 mph) ball impact testing of Starphire soda lime silicate glass. The intent was to better understand low velocity impact response in the Starphire for sphere densities that bracketed that of rock. Five sphere materials were used: borosilicate glass, soda-lime silicate glass, steel, silicon nitride, and alumina. A ...


Sensory Coordination of Insect Flight
30 Sep 2011
Authors: Sanjay Sane; TATA INST OF FUNDAMENTAL RESEARCH BANGALORE (INDIA) NATIONAL CENTRE FOR BIOLOGICAL SCIENCES                                                    
This is the final report of a project that studied antennal positioning in moths and freely flying bees, location of odor sources in the fruit fly, coordination of wings and halters in the soldier fly, and landing behavior in the housefly.


Independent Auditor's Report on the Agreed-Upon Procedures for Reviewing the FY 20II Civilian Payroll Withholding Data and Enrollment Information
30 Sep 2011
21 pages
Authors: INSPECTOR GENERAL DEPT OF DEFENSE ARLINGTON VA                                                    
For employee benefit withholding and contributions, obtain the Agency Payroll Provider s September 2010 and March 2011 Semiannual Headcount Report submitted to OPM and a summary of Retirement and Insurance Transfer System (RITS) submissions for September 2010 and the current fiscal year. For each program (retirement, health, and life), select a total of three RITS submissions for September 2010 and the current fiscal year; two will coincide with the September ...


Summary of Information Assurance Weaknesses as Reported by Audit Reports Issued from August 1, 2010, through July 31, 2011
30 Sep 2011
38 pages
Authors: INSPECTOR GENERAL DEPT OF DEFENSE ARLINGTON VA                                                    
The purpose of this report is to provide a reference document that identifies all audit reports that contained findings outlining information assurance weaknesses in DoD. The overall objective was to summarize the information assurance (IA) weaknesses identified in reports and testimonies issued by the DoD audit community and the Government Accountability Office (GAO) between August 1, 2010, and July 31, 2011. This summary report supports the Department of Defense Office ...


Acoustic Seaglider (trademark) for Beaked Whale Detection
30 Sep 2011
21 pages
Authors: Neil M Bogue; James C Luby; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB                                                    
This is the final report on the Office of Naval Research (ONR) -sponsored program entitled Acoustic Seaglider(trademark) for Beaked Whale Detection. This research at the Applied Physics Laboratory of the University of Washington (APL-UW) was part of the ONR Passive Autonomous Acoustic Monitoring (PAAM) of marine mammals program. Research was focused on development and operation of a passive acoustic system for the buoyancy-driven autonomous underwater vehicle Seaglider, capable of autonomous ...


DOD Financial Management: Improved Controls, Processes, and Systems Are Needed for Accurate and Reliable Financial Information
23 Sep 2011
28 pages
Authors: Asif A Khan; J  C Martin; F  A Dymond; Gayle Fischer; Greg Pugnetti; Darby Smith; Beatrice Alff; Steve Donahue; Keith McDaniel; Maxine Hattery; Hal Santarelli; Sandy Silzer; GOVERNMENT ACCOUNTABILITY OFFICE WASHINGTON DC                                                    
The department is facing near and long-term internal fiscal pressures as it attempts to balance competing demands to support ongoing operations, rebuild readiness following extended military operations, and manage increasing personnel and health care costs as well as significant cost growth in its weapon systems programs. For more than a decade, DOD has dominated GAO s list of federal programs and operations at high risk of being vulnerable to fraud, ...


Competition for Interrogation Arm Contracts Needs Improvement
19 Sep 2011
45 pages
Authors: INSPECTOR GENERAL DEPT OF DEFENSE ARLINGTON VA                                                    
This report is the second in a series of reports addressing DoD contracts for countermine and improvised explosive device (IED) defeat systems used in Iraq and Afghanistan. The overall audit objective was to determine whether DoD procurement efforts for countermine and improvised explosive device defeat systems used in Iraq and Afghanistan were developed, awarded, and managed in accordance with Federal and Defense acquisition regulations. Specifically, we determined whether the Joint ...


Shadowcopy: A Python-Based Shadow Volume Enumeration and Digest Tool
12 Sep 2011
23 pages
Authors: Mike Horn; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF COMPUTER SCIENCE                                                    
This report presents shadowcopy, tool written in Python that extracts and deduplicates files from Microsoft NTFS Shadow copies using the Microsoft Volume Shadow Service (VSS), copies the files to an external volume, and prepares a report of each extracted file's name, timestamp, original path, and MD5 hash value


Pricing and Escalation Issues Weaken the Effectiveness of the Army Contract With Sikorsky to Support the Corpus Christi Army Depot
08 Sep 2011
85 pages
Authors: INSPECTOR GENERAL DEPT OF DEFENSE ARLINGTON VA                                                    
The overall objective of the audit was to evaluate material purchases made at Corpus Christi Army Depot (CCAD) through the partnership agreement with Sikorsky Aircraft Corporation (Sikorsky). Specifically, we determined whether the partnership agreement with Sikorsky effectively minimized the cost of direct materials to the depot. See Appendix A for a discussion of the scope and methodology and prior coverage. This report is one of two reports examining the Army ...


Iraq and Afghanistan: DOD, State, and USAID Cannot Fully Account for Contracts, Assistance Instruments, and Associated Personnel
Sep 2011
33 pages
Authors: John P Hutton; Johana R Ayers; E  B Booth; Virginia Chanley; Julia Kennon; Gilbert Kim; Angie Nichols-Friedman; Anne McDonough-Hughes; Margaret McKenna; Robert Swierczek; GOVERNMENT ACCOUNTABILITY OFFICE WASHINGTON DC                                                    
DoD, State, and USAID have relied extensively on contracts and assistance instruments (grants and cooperative agreements) for a range of services in Iraq and Afghanistan. In the last 3 years, GAO has provided information on the agencies' contracts, assistance instruments, and associated personnel in the two countries, detailing the agencies' challenges tracking such information. Amendments from the National Defense Authorization Act for Fiscal Year 2011 now require the agencies to ...


Mosquitoes of Guam and the Northern Marianas: Distribution, Checklists, and Notes on Mosquito-Borne Pathogens
Sep 2011
13 pages
Authors: Leopoldo M Rueda; James E Pecor; Will K Reeves; Stephen P Wolf; Peter V Nunn; Rosanna Y Rabago; Teresa L Gutierrez; Mustapha Debboun; WALTER REED ARMY INST OF RESEARCH SILVER SPRING MD                                                    
This report includes the distribution records and updated checklists of the mosquitoes known to occur in Guam and nearby selected islands (ie, Saipan, Tin ian, Rota), based on our field collections from various localities during 20 I 0 published reports, and accessioned specimens deposited in the US National Museum of Natural History, Smithsonian lnstirution, Washington, DC. The starus of common and potential mosquito vectors and their borne-pathogens are also noted. ...


Army Acquisition and Contracting Personnel Requirements: How are the Army's Current Recruitment, Development and Retention Programs Meeting Current and Future Personnel Requirements?
Sep 2011
164 pages
Authors: Karen E Allen; James W Doran; Bonnie L Westbrook; NAVAL POSTGRADUATE SCHOOL MONTEREY CA                                                    
The Department of Defense (DoD) is realizing a current and expected future shortage in experienced acquisition and contracting personnel due, in part, to a hiring freeze in the middle 1990s and the number of personnel that are eligible to retire in the next five years. This Joint Applied Project (JAP) will focus on the Army's current acquisition and contracting personnel recruitment programs, personnel development programs and personnel retention programs within ...


Developing Information Storage and Retrieval Systems on the Internet: A Knowledge Management Approach
Sep 2011
91 pages
Authors: Charles A Fulmer; NAVAL POSTGRADUATE SCHOOL MONTEREY CA                                                    
Search is becoming the primary way in which people get information. In 2010, global Internet usage was over two billion people, with 92% of online adults using search engines to find information. Most commercial search engines (Google, Yahoo, Bing, etc.) provide their indexing and search services at no cost. The DoD can achieve large gains at a small cost by making public documents available to search engines. This can be ...


EELV Secondary Payload Adapter (ESPA) Ring: Overcoming Challenges to Enable Responsive Space
Sep 2011
95 pages
Authors: Robert M Atkins; NAVAL POSTGRADUATE SCHOOL MONTEREY CA SPACE SYSTEMS ACADEMIC GROUP                                                    
Technology advancement is a primary goal for military space development. By staying ahead of the competition, space systems can offer unique battlefield capabilities. A number of space programs are increasingly behind schedule, over budget, and underperforming. This thesis explains the benefits the Evolved Expendable Launch Vehicle (EELV) Secondary Payload Adapter (ESPA) ring can offer programs experiencing technical immaturity or desiring responsive space. By understanding and adhering to the ESPA Rideshare ...


Integration of Sustainment Management Systems (SMS) with the Army Installation Status Report for Infrastructure (ISR-I)
Sep 2011
43 pages
Authors: Michael N Grussing; Kelly M Dilks; Matthew C Walters; ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN IL CONSTRUCTION ENGINEERING RESEARCH LAB                                                    
This report describes the process for integrating the BUILDER Sustainment Management System (SMS) with the US Army Installation Status Report for Infrastructure (ISR-I). A common building component and assessment data framework between SMS and ISR-I was developed to link local facility condition and functional requirements managed through the BUILDER Sustainment Management System (SMS) to enterprise-level quality and mission metrics reported in the ISR-I. To accomplish this, the applicable facility components ...


Multiscale Modeling of Armor Ceramics: Focus on AlON
Sep 2011
16 pages
Authors: G  A Gazonas; J  W McCauley; I  G Batyrev; D Casem; J  D Clayton; D  P Dandekar; R Kraft; B  M Love; B  M Rice; B  E Schuster; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD                                                    
The computational modeling linkage from the atomistic to the continuum scales of homogeneous and discrete deformation mechanisms (twinning, cleavage, micro-cracking, stacking faults, et cetera), nano- and microstructure and defects, to dynamic failure processes in brittle materials should provide pathways to designing improved mechanical performance through controlled processing. This report will review results from an internal multiscale computational program in first-principles design of armor ceramics, with a focus on an optically ...


A Randomized Phase 2 Trial of 177Lu Radiolabeled Anti-PSMA Monoclonal Antibody J591 in Patients with High-Risk Castrate Biochemically Relapsed Prostate Cancer
Sep 2011
16 pages
Authors: Scott T Tagawa; CORNELL UNIV MEDICAL COLL (WEILL) NEW YORK                                                    
Clinical trial has received WCMC IRB and CTSC approval with enrollment of initial 3 subjects at WCMC. An additional 12 subjects enrolled (7 treated) at participating sub-sites. Reports submitted to WCMC DSMB with recommendation to proceed with enrollment.


Yttria Nanoparticle Reinforced Commercially Pure (CP) Titanium
Sep 2011
20 pages
Authors: Sesh Tamirisa; FMW COMPOSITE SYSTEMS INC BRIDGEPORT WV                                                    
Previous literature reports have indicated as much as an approximate two-fold increase in tensile properties in commercially pure (CP) titanium (Ti) following the introduction of yttria (Y2O3) nanoparticles. However, these initial studies used laboratory-scale samples produced via an arc-melting process. In order to evaluate the potential for scale-up, CP Ti powders containing both yttria nanoparticles as well as titanium boride (TiB) reinforcements were produced through gas atomization. After consolidation and ...


Sky Glow from Cities: The Army Illumination Model v2
Sep 2011
48 pages
Authors: Richard C Shirkey; ARMY RESEARCH LAB WHITE SANDS MISSILE RANGE NM                                                    
The increasing number of people living on earth and the corresponding increase in outdoor lighting has resulted in light pollution a brightening night sky that has obliterated the stars for much of the world s population. However, for military purposes, in particular Night Vision Goggle (NVG) users, this light can allow for detection of targets that might ordinarily not be seen. The amount of light scattered from an urban location ...


Experiments in Cold Atom Optics at ARL I: Introduction to Atom Chip Set-up
Sep 2011
28 pages
Authors: Jason Alexander; Christopher Rowlett; Violeta Prieto; William Golding; Patricia Lee; ARMY RESEARCH LAB ADELPHI MD                                                    
Gyroscopes based on ultracold atom interferometry have the potential to exhibit an intrinsic sensitivity larger by a factor of 4 x 1010 than for light-based interferometers. One of the major technical challenges for the advancement of atom optics and development of practical guided matter wave interferometers is the realization of coherent beam splitters. The overall focus of our research program is to develop a physical understanding of the conditions needed ...


The Line Operations Safety Audit Program: Transitioning From Flight Operations to Maintenance and Ramp Operations
Sep 2011
20 pages
Authors: Jiao Ma; Mark Pedigo; Lauren Blackwell; Kevin Gildea; Kali Holcomb; Carla Hackworth; John J Hiles; FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OK CIVIL AEROSPACE MEDICAL INST                                                    
Managing risk has become increasingly important in modern organizations, including medicine, aviation, and finance. Accident investigation concentrates on failures, which are important for discovering major breakdowns, but failures are rare events. Proactive approaches offer the flexibility of observing normal operations A Line Operations Safety Audit (LOSA) is a voluntary safety program that collects safety data during normal airline operations and was originally designed for flight deck operations. The goal of ...


Using a Volume Bragg Grating Instead of a Faraday Isolator in Lasers Incorporating Stimulated Brillouin Scattering Wavefront Reversal or Beam Cleanup
29 Aug 2011
Authors: John E McElhenny; Jeffrey O White; Steven D Rogers; Tigran Sanamyan; Leonid B Glebov; Oleksiy Mokhun; Vadim I Smirnov; ARMY RESEARCH LAB ADELPHI MD                                                    
A master-oscillator power-amplifier with stimulated Brillouin scattering (SBS) beam cleanup or wavefront reversal typically incorporates a Faraday isolator to outcouple the Stokes light, limiting the power scalability. Volume Bragg gratings (VBGs) have the potential for scaling to higher powers. We report here the results of tests on a VBG designed to resolve wavelengths 0.060 nm apart, corresponding to the 16 GHz frequency shift for SBS backscattering at 1064 nm in ...


ESTCP Live Site Demonstrations Former Camp Beale, Marysville, CA
23 Aug 2011
51 pages
Authors: ENVIRONMENTAL SECURITY TECHNOLOGY CERTIFICATION PROGRAM OFFICE (DOD) ARLINGTON VA                                                    
This document serves as the demonstration data report for the Man-Portable Electromagnetic Induction (EMI) Array for UXO Detection and Discrimination, or TEMTADS MP 2x2 Cart, participation in the Environmental Security Technology Certification Program (ESTCP) Live Site Demonstrations at the former Camp Beale, located in Marysville, CA in June, 2011. To limit the repetition of information, demonstration- and site- specific information that is presented elsewhere, such as the ESTCP Live Site ...


Defense Finance and Accounting Service Needs to Improve Controls Over the Completeness and Accuracy of the Cash Management Report
15 Aug 2011
35 pages
Authors: Amy J Frontz; INSPECTOR GENERAL DEPT OF DEFENSE ARLINGTON VA                                                    
We assessed the completeness and accuracy of the Cash Management Report. This is the first of two reports relating to the reconciliation of Fund Balance with Treasury for the Other Defense Organizations (ODOs). As of September 30, 2009, DoD reported $80.3 billion in Fund Balance with Treasury on the ODO General Fund Balance Sheet. The DoD IG found that the Cash Management Report was not complete or accurate. Specifically, the ...


Pashtun Social Structure: Cultural Perceptions and Segmentary Lineage Organization
03 Aug 2011
25 pages
Authors: Joseph A Tainter; Donald G MacGregor; MACGREGOR BATES INC COTTAGE GROVE OR                                                    
The Pashtun are an ethnic group that straddles the Afghanistan-Pakistan border, and are the largest group in Afghanistan. Pashtun social structure is what anthropologists term a segmentary lineage system. In such a system, there is a hierarchy of social groupings starting at the local level, then proceeding upward through various levels to an entire ethnic group. These relationships are based on kinship and shared culture. Segmentary lineage organization presents outsiders ...


Evaluation of Bridges Subjected to Military Loading and Dynamic Hydraulic Effects: Review of Design Regulations, Selection Criteria, and Inspection Procedures for Bridge Railing Systems
AUG 2011
222 pages
Authors: Alberto M. Figueroa; Elizabeth Negron; Genock Portela; Rodney N. Gonzalez-Rivera; Henry Diaz-Alvarez; Gerardo I. Velazquez; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS GEOTECHNICAL AND STRUCTURES LAB                                                    
This report presents the results of the initial phase of a research study with the objective of documenting the current state-of-the-practice, at the national level and for the 32 states and the Commonwealth of Puerto Rico having military installations, related to the requirements, selection criteria, and inspection process for bridge safety barriers. The focus of the study was directed at identifying policies and recommended practices related to low speed, low ...


Dynamic Structural Flexible-Beam Response to a Moving Barge Train Impact Force Time-History Using Impact_Beam
Aug 2011
303 pages
Authors: Robert M Ebeling; Abdul N Mohamed; Jose R Arroyo; Barry C White; Ralph W Strom; Bruce C Barker; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS INFORMATION TECHNOLOGY LAB                                                    
To design simply-supported, flexible impact beams spanning between cells or bents for lock approach walls, a dynamic structural analysis of the beam under impact time-history loads for design- specific barge trains is required. At several locks, this flexible structural feature is the primary structural member resisting the glancing-blow impact event of a barge train as it aligns itself with a lock. This technical report describes an engineering methodology used to ...


Ecological DYnamics Simulation Model - Light (EDYS-L): User's Guide Version 4.6.4
Aug 2011
94 pages
Authors: Cade L Coldren; Terry McLendon; W  M Childress; David L Price; Mark R Graves; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB                                                    
THIS REPORT DESCRIBES THE ECOLOGICAL DYNAMICS SIMULATION MODEL LIGHT MODEL (EDYS-L) IN TERMS OF ITS FUNCTION AND HOW TO USE THE MODEL SOFTWARE. EDYS-L IS DESIGNED TO MECHANISTICALLY SIMULATE COMPLEX ECOLOGICAL DYNAMICS ACROSS SPATIAL SCALES RANGING FROM SQUARE METERS TO LANDSCAPE AND WATERSHED LEVELS. MODULES INCLUDE CLIMATIC SIMULATORS, HYDROLOGY, SOIL PROFILE, NUTRIENT AND CONTAMINANT CYCLES, PLANT COMMUNITY DYNAMICS, HERBIVORY, ANIMAL DYNAMICS, MANAGEMENT ACTIVITIES, AND NATURAL/ANTHROPOGENIC DISTURBANCES. DESIGNATION OF SCENARIOS AND ...


Transforming Wartime Contracting: Controlling Costs, Reducing Risks
Aug 2011
249 pages
Authors: COMMISSION ON WARTIME CONTRACTING ARLINGTON VA                                                    
Contractors represent more than half of the U.S. presence in the contingency operations in Iraq and Afghanistan, at times employing more than a quarter-million people. They have performed vital tasks in support of U.S. defense, diplomatic, and development objectives. But the cost has been high. Poor planning, management, and oversight of contracts has led to massive waste and has damaged these objectives. The volume and complexity of contract actions have ...


High Frontier: The Journal for Space and Missile Professionals. Volume 7, Number 4, August 2011
Aug 2011
Authors: AIR FORCE SPACE COMMAND PETERSON AFB CO                                                    
This issue of High Frontier Journal, our final edition, appropriately focuses on the Report of the Commission to Assess United States National Security Space Management and Organization and its impact 10 years later. Commonly known as the Space Commission, this landmark study helped shape today's national security space enterprise.


Capability and Interface Assessment of Gaming Technologies for Future Multi-Unmanned Air Vehicle Systems
Aug 2011
34 pages
Authors: Marc Gacy; ALION SCIENCE AND TECHNOLOGY-MA&D BOULDER CO                                                    
This report evaluates several gaming technologies and details their applicability to future control concepts for multiple unmanned air vehicle systems (UAS). Current gaming technologies evaluated include Real-Time Strategy (RTS) games, which require the simultaneous control of multiple entities; Massively Multiplayer Online Role Playing Games (MMORPG), which necessitate the management of multiple independent entities with sophisticated capabilities; and finally, arcade-style games, which demand the use of mitigation strategies to contend with ...


The Association Between Suicide and OEF/OIF Deployment History
Aug 2011
8 pages
Authors: Mark Reger; GENEVA FOUNDATION LAKEWOOD WA                                                    
One of the most important questions in military suicide research at this time is whether deployment in support of Operations Iraqi or Enduring Freedom (OIF/OEF) is associated with an increased risk of suicide. The equivocal research conducted to date on this topic creates a confusing picture for military senior leaders and the American public. The Report of the Blue Ribbon Workgroup on Suicide Prevention in the Veteran Population (Peake, 2008) ...


Coalition Interoperability Measurement Frameworks Literature Survey
Aug 2011
102 pages
Authors: Philip Bury; DEFENCE RESEARCH AND DEVELOPMENT CANADA OTTAWA (ONTARIO) CENTRE FOR OPERATIONAL RESEARCH AND ANALYSIS                                                    
This paper is the report of a review of selected works that were referred to in a 2007 survey of methods to measure interoperability between military forces. It forms part of an effort to develop a framework for assessing interoperability in command, control, computers, and communications. The framework is being developed by the Joint Studies Operational Research Team, and is sponsored by Assistant Deputy Minister (Information Management). For the framework, ...



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Heavy Lift Army Landing Craft
Jul 2010
39 pages
Authors: Amir Abdelsalam; III Luder  Alton; Andrea Shen; Doug Wohlenhaus; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV WEST BETHESDA MD                                                    
Landing craft are used to quickly transport cargo to areas where larger ships are unable to reach due to beach gradient limitations or lack of an adequate port. The current landing craft of the U.S. Army are limited by poor seakeeping capabilities and they operate at very low speeds, unloaded and fully loaded. The goal of the Heavy Lift Army Landing Craft (HLALC) project is to develop a concept design ...


Hull Mechanical and Electrical Equipment Standardization Program
2010
15 pages
Authors: DEFENSE LOGISTICS AGENCY FORT BELVOIR VA DEFENSE STANDARDIZATION PROGRAM OFFICE                                                    
This case study describes how the Navy is dramatically increasing standardization of hull mechanical and electrical (HM&E) equipment across Navy ships, thereby conserving money, manpower, and time, while improving the operational readiness and availability of the fleet.


Hull, Mechanical, and Electrical Equipment Standardization in the U.S. Navy Surface Force: A Case of Competing Objectives and Stakeholder Trade-Off Decisions
14 DEC 2007
156 pages
Authors: Jerome R. White; ARMY COMMAND AND GENERAL STAFF COLL FORT LEAVENWORTH KS                                                    
The lack of a successful Standardization Program for Hull, Mechanical, and Electrical (HM&E) equipment and components of ships in the surface force costs the United States Navy hundreds of millions of dollars annually. Approximately half of the total parts in the surface fleet are installed on three or fewer ships and nearly 20 percent are one of a kind. These parts are not officially considered to be "non-standard" since they ...


Axial Waterjet (AxWJ) Model 5662: Hull Resistance and Model-Scale Powering with LDV Nozzle Design
SEP 2007
72 pages
Authors: Dominic S. Cusanelli; Scott A. Carpenter; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD                                                    
This report is a partial documentation of the first series of model-scale tests conducted 12/06-2/07, to evaluate the Axial Waterjet (AxWJ), Model 5662, on the Joint High Speed Sealift (JHSS) hull platform. This document contains calm water resistance and model-scale powering test results only. Bare hull effective powers were determined for the AxWJ hull at three displacement conditions. Appended effective power was determined for the AxWJ hull with the LDV ...


Drop Tests to Support Water-Impact and Planing Boat Dynamics Theory
SEP 1997
24 pages
Authors: Ronald Peterson; David Wyman; Carolyn Frank; NAVAL SURFACE WARFARE CENTER PANAMA CITY FL                                                    
The occupants of high-speed planing boats are exposed to repeated  shock impacts that result from hull slamming during operation in heavy seas. An  important component of the research necessary for developing shock reduction  technology is two dimensional water-impact theory. Drop tests provide data  necessary for evaluating. shock reduction concepts, and for developing and  validating two-dimensional theory. This report summarizes the method and results of an ...


An Underwater Vehicle and a Fin Assembly Therefor.
07 FEB 1996
14 pages
Authors: William H. Nedderman   Jr; DEPARTMENT OF THE NAVY  WASHINGTON DC                                                    
A fin assembly for an underwater vehicle, the assembly comprising a portion of the hull of the vehicle having a recess therein, and a sleeve proximate a forward end of the recess and inclined inwardly from the hull portion at an angle to the hull portion and inclined transversely of the fore-and-aft axis of the vehicle at an angle to the hull portion. The assembly further comprises a fin having ...


Underwater Vehicle Tailcone Assembly.
14 MAR 1995
Authors: Neil J. Dubois; DEPARTMENT OF THE NAVY WASHINGTON DC                                                    
There is presented an underwater vehicle tailcone assembly including a forward flange, a first tubular sheath extending rearwardly from the forward flange, and elastomer material bonded to inner and outer surfaces of the first sheath to form a forward chamber wall. The assembly further includes an aft flange, a second tubular sheath extending forwardly from the aft flange, and elastomer material bonded to inner and outer surfaces of the second ...


The National Shipbuilding Research Program. 1995 Ship Production Symposium. Paper No. 5: Producibility of Double Hull Tankers
JAN 1995
29 pages
Authors: John C. Daidola; John Parente; William H. Robinson; ROSENBLATT (M) AND SON INC NEW YORK                                                    
Alternative structural system concepts have been developed for 40K and 95KDWT double hull tankers, with the objective of studying their producibility in existing U.S. shipyards, including labor hours and construction schedules. Structural components and elements considered included alternative material, shell plating, bulkheads, stiffeners and other structural elements for both conventional and unidirectional double hull tankers, together with shipbuilding processes such as automation and accuracy control, and standardization including design. It ...


Retractable, Lever Action, Scroll Seal for a Surface Effect Ship.
29 SEP 1987
Authors: Fred W. Wilson; Timothy D. Smith; DEPARTMENT OF THE NAVY WASHINGTON DC                                                    
This abstract discloses an improved seal design for a Surface Effect Ship, having an inflatable inner seal member, and outer seal member composed of a pliable sheet material scrollably affixed to the hull fore and aft of the inner seal member. The seal may be retracted for hullborne operation by deflating the inner seal member and scrolling the outer seal member tight to hull. The inner seal member has transverse ...


Decision-Making Process of an Antisubmarine Warfare Commander
SEP 86
49 pages
Authors: Douglas L. Robbins; NAVAL POSTGRADUATE SCHOOL MONTEREY CA                                                    
This thesis represents a study of the decision-making process of an Anti-submarine Warfare Commander (ASWC). Several real world operational issues are analyzed and discussed as to how they can influence his thought process when making decisions. One approach to model this individual's thought process was accomplished by ALPHATECH, INC. By utilizing an ASW scenario, it evaluates how an ASWC makes his tactical decisions to track submarines based upon pieces of ...


Hazardous Chemical Discharge Prevention and Reduction
MAY 1984
Authors: R. T. Walker; COAST GUARD RESEARCH AND DEVELOPMENT CENTER GROTON CT                                                    
This is the final report on the Coast Guard's Hazardous Chemical Discharge Prevention and Reduction Project. The objective of this project was to investigate and develop improved techniques and hardware to prevent the discharge of hazardous chemicals from an endangered marine vessel, and to stop or reduce the discharge from a marine transport container which is already leaking. The end products of this research and development project are passed on ...


Adaptation of Crew Performance, Stress and Mood Aboard a SWATH and MONOHULL Vessel
16 FEB 1981
86 pages
Authors: Steven F. Wiker; Ross L. Pepper; COAST GUARD WASHINGTON DC OFFICE OF RESEARCH AND DEVELOPMENT                                                    
In the Spring of 1978, a study was conducted to measure the effects of vessel motions characteristic to a 89' Navy Small Waterplane Area Twin Hull (SWATH) vessel, a 95' Coast Guard Patrol Boat and a 378' Coast Guard High Endurance Cutter upon various psychomotor and cognitive performance tasks and physiological and psychological indexes of stress. These measures were repeatedly sampled from eighteen Coast Guardsmen who were exposed to each ...


A Study of Planing Catamaran Hull and Tunnel Interactions
FEB 1975
37 pages
Authors: T. J. Sherman; Peter A. Fisher; MICHIGAN UNIV  ANN ARBOR SHIP HYDRODYNAMICS LAB                                                    
A high speed, low displacement set of catamaran hulls has been model tested with various hull separations and tunnel heights. Symmetric, axisymmetric and unsymmetric hull forms have been tested and compared in terms of resistance to determine the interaction effects of the sponsons. A computer program for the prediction of power for prismatic planing boats has been modified to include catamarans.


Galvanic Corrosion of Coated HY-130 Steel Coupled to 5456 Aluminum.
MAR 1974
21 pages
Authors: Harvey P. Hack; DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER  ANNAPOLIS MD                                                    
Specimens of HY-130 steel were galvanically coupled to 5456-H117 aluminum in natural sea water at velocities of 0 to 30 feet per second. The steel was coated with an epoxy primer and topcoat to various degrees: fully coated, coated with defect, partially coated, and uncoated. Corrosion rates of both materials increased with increasing sea-water velocity. Corrosion of the HY-130 was reduced and that of the aluminum was increased when galvanically ...


Hydrodynamic Design Requirements for the SANS Device.
OCT 1973
Authors: K. W. Watkinson; D. W. Shepherd; D. E. Humphreys; NAVAL COASTAL SYSTEMS LAB PANAMA CITY FL                                                    
The hydrodynamic analysis of the Swimmer Acoustic Navigation System (SANS) device is presented. This analysis includes the design requirements necessary to achieve neutral buoyancy, static trim, and dynamic stability. Results of trim and ballast calculations are shown to be within 3 percent of the final measured values. The wing design necessary to achieve dynamic stability is shown to have a span of 7 inches, an area of 1.005 sq. ft., ...


Hydrodynamic Design Procedure for a Dynaplane Boat.
JUN 1971
Authors: Eugene P. Clement; George B.  Springston  Jr.; Wilburn L. Moore; NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER  WASHINGTON D C                                                    
A stepped planing boat which has only one half as much drag at high speed in calm water as a conventional unstepped planing boat was developed.  This boat, the dynaplane, has shallow sweptback step, a cambered main lifting surface, and an adjustable stabilizer at the stern for balance, stability, and control of trim.  The procedure for designing a dynaplane boat is explained.  (Author)


Engineering Design Handbook:  Wheeled Amphibians.
11 JAN 1971
425 pages
Authors: ARMY MATERIEL COMMAND  WASHINGTON D C                                                    
This handbook has been prepared as an aid to engineers designing wheeled amphibians.  Fundamental design information not readily attainable elsewhere is presented along with requirements and problem areas that are unique to the wheeled amphibian.  Part One introduces the principal elements of the wheeled amphibian, design requirements, and a history of amphibian development. The actual design process is described in Part Two in which the amphibian evolves from ...


A Central Control Ground Locating System for Energized Shipboard Electrical Power Systems.
NOV 1970
Authors: Ernest W. Fisher; NAVAL SHIP RESEARCH AND DEVELOPMENT LAB ANNAPOLIS MD                                                    
The present method of locating grounds on normally ungrounded shipboard electrical power systems requires that branches of the circuit be switched off and on one at a time until the grounded circuit is located by observing indicator lights. Since it is vital that the power to much equipment on modern ships not be interrupted, an instrument system has been developed to obviate that requirement. It operates on the principle of ...


Investigation of Filament-Reinforced Plastic Deep-Submergence Pressure Hulls.
JUN 1969
Authors: William P. Couch; Gerald D. Ward; William F. Blumenburg; DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER  BETHESDA MD                                                    
A large number of models employing a variety of geometric concepts and fabricated from plastic reinforced with glass, carbon, and boron fibers were tested under external hydrostatic pressure. The results were evaluated to explore the feasibility of using filament-reinforced plastics (FRP) as a structural material for the pressure hulls of deep-ocean research vehicles. A concurrent theoretical study indicated that FRP offers the greatest potential for this application at depths greater ...


DESTROYER CONCEPTUAL DESIGN STUDIES FOR DEPARTMENT OF THE NAVY OFFICE OF NAVAL RESEARCH. VOLUME II.
01 AUG 1968
Authors: MCMULLEN (JOHN J) ASSOCIATES INC NEW YORK                                                    
Contents: Project Background and Definition; First Preliminary Design; Hull Optimization Studies; Machinery Optimization Studies; Technical Evaluation; Final Preliminary Design.


Study of One Atmosphere Manned Underwater Structures, Volume I, Summary.
JUN 1968
Authors: Homer S. Youngs; NORTH AMERICAN ROCKWELL CORP ANAHEIM CA  OCEAN SYSTEMS OPERATIONS                                                    
The study was initiated with the objective of examining the various concepts for one-atmosphere manned underwater structures in order to develop effective guidelines for use in selecting appropriate structures for a variety of missions. For the purpose of this study, structures are defined as the enclosed one-atmosphere environment in which man can operate. A structure may be a pressure hull resting on or suspended above the ocean floor, or it ...


Study of One Atmosphere Manned Underwater Structures. Volume II. Technical.
JUN 1968
Authors: Homer S. Youngs; NORTH AMERICAN ROCKWELL CORP ANAHEIM CA  OCEAN SYSTEMS OPERATIONS                                                    
The Study of One-Atmosphere Manned Underwater Structures(SOAMUS) has accomplished three primary tasks: (1) identification and listing of various roles and missions which have been advanced for one-atmosphere manned underwater structures; (2) identification and assessment of structure concepts which have been developed by government agencies and industry, and which meet parameters established for the study; and (3) analyses of costs and sensitivities of structures concepts in terms of such parameters as ...


THE EFFECT OF LENGTH-BEAM RATIO AND HYDROFOIL CONTROL ON THE TAKE-OFF CHARACTERISTICS OF HYDROFOIL CRAFT IN REGULAR HEAD SEAS.
MAY 1968
Authors: P. Ward Brown; Y. H. Chey; STEVENS INST OF TECH  HOBOKEN NJ DAVIDSON LAB                                                    
A series of three hydrofoil boats differing in length-beam ratio is studied to determine motion response and added resistance during take-off in head seas. The effect of hydrofoils is simulated mechanically. The effect of automatic incidence control of the foils is considered. Motion response is shown to vary linearly with wave height, and added resistance to vary linearly with wave slope. High length-beam ratio is shown to reduce calm-water resistance ...


USER MANUAL FOR THE FINITE ELEMENT PROGRAM OF STRUCTURAL ANALYSIS.
APR 1968
Authors: Geoffrey O. Thomas; James H. Ma; DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD STRUCTU RES DEPT                                                    
This report describes the use of a computer program to perform an elastic analysis of complex structural components or their assemblage. The program is a modification of one originally developed by Professor J. R. Paulling, Department of Naval Architecture, University of California, Berkeley, California. Good engineering results can be obtained by judicious application of finite element techniques, where a real structure is idealized into discrete plate or bar elements whose ...


THE BRITISH SHIP RESEARCH ASSOCIATION.
12 FEB 1968
Authors: Frederick H. Todd; OFFICE OF NAVAL RESEARCH LONDON (UNITED KINGDOM)                                                    
The report describes the organization and work of the British Ship Research Association, as gathered during visits to the Association's Headquarters in London and its Research Station at Wallsend-on-Tyne, Northumberland. The Association is engaged on research for the shipbuilding, shipowning and marine engineering industries, covering such fields as automation of engine rooms, hydrodynamic research into resistance and propulsion of model hulls, seaworthiness qualities, steering and maneuvering, stopping of large tankers, ...


BEHAVIOR OF SPHERICAL CONCRETE HULLS UNDER HYDROSTATIC LOADING. PART II. EFFECT OF PENETRATIONS.
OCT 1967
Authors: J. D. Stachiw; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF                                                    
The objective of the study was (1) to show that concrete hulls with window and hatch penetrations for ocean bottom habitats can be built, and (2) to determine if the collapse pressure of such hulls is degraded by the incorporation of properly designed penetrations. All of the experimental work was performed on six concrete spheres (16-inch outside diameter and 14-inch inside diameter) cast from concrete with a uniaxial compressive strength ...


HULL FOULING
JUL 1967
23 pages
Authors: Richard J. Stenson; DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD                                                    
This report contains the results of an investigation conducted by the Naval Ship Research and Development Center (formerly David Taylor Model Basin) concerning the effects of hull fouling encountered during various full-scale trails. Measurements were made to determine the increase in powering requirements as days out of drydock increased. Data are presented for two frigates, a destroyer division, and a submarine.


MODEL TESTS OF A STEPPED PLANING BOAT WITH AN ADJUSTABLE STERN STABILIZER.
MAY 1967
Authors: Eugene P. Clement; NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER WASHINGTON D C HYDROMECHANICS LAB                                                    
A stepped hull is being developed which has an adjustable planing stabilizer at the stern for balance, stability, and control of trim. At high speed, this craft planes on a small area forward of the step (which is located approximately at midlength), with the stern supported by the adjustable stabilizer. Since the afterbody wetted area is eliminated at high speed, the frictional resistance, and accordingly the total drag also are ...


GREEN BOOK OF COASTAL VESSELS: SOUTH VIETNAM
1967
336 pages
Authors: BATTELLE MEMORIAL INST COLUMBUS OH COLUMBUS LABS                                                    
The volume is intended to aid personnel who are engaged in patrol operations and in the stop-and-search activities in the coastal waters of South Vietnam. It is basically a recognition manual for the common types of wooden- hulled boats and for the intracoastal steel-hulled ships that operate there. However, interviews with patrol personnel in South Vietnam disclosed that recognition is only a small part of the patrol operation. More important ...


A REVIEW OF CURRENT AND FUTURE AMPHIBIOUS SURFACE VEHICLES. VOLUME II. HYDRODYNAMIC CONSIDERATIONS.
31 OCT 1966
Authors: Roy S. Rice; Ewald F. Schroeder; CORNELL AERONAUTICAL LAB INC BUFFALO NY                                                    
Report on the Acoustic Transmission and Vibration Damping Characteristics of Materials for Use on Acoustic Windows of Sonar Domes.
25 AUG 1966
Authors: NAVAL APPLIED SCIENCE LAB BROOKLYN N Y                                                    
Although instrumentation for sonar detection has progressed to a fairly advanced stage, the presence of interference noise still remains the fundamental controlling factor in establishing sonar range and accuracy. Some of the interference noise is transmitted to the sonar transducers as a result of vibrations due to hydrodynamic or structure-borne excitations in the hull-mounted sonar dome itself. One of the methods currently used to reduce the vibrations in the AN/SQS-23 ...


FARFIELD PRESSURE OF RANDOMLY VIBRATING STRUCTURES OVER GIVEN FREQUENCY BANDS.
OCT 1965
Authors: Joshua E. Greenspon; J G ENGINEERING RESEARCH ASSOCIATES BALTIMORE MD                                                    
A relation between the cross spectral density of the farfield pressure outside a surface surrounding a sound source is given in terms of cross spectral density of the normal acceleration over a surface surrounding the source; the cross spectral density of the acceleration is given in terms of the modes of the structure. A resulting multipole expansion for the mean square farfield pressure in low frequency bands is derived using ...


POROUS MATERIAL DEVELOPMENT FOR BOUNDARY LAYER CONTROL,
22 DEC 1964
Authors: G. May; W. B. Giles; GENERAL ELECTRIC CO SCHENECTADY NY ADVANCED TECHNOLOGY LABS                                                    
A description is presented of the development of a new porous material that was undertaken specifically for the application of area suction boundary layer control to underwater vehicles. This material was subsequently used in the manufacture of several hydrodynamic test models varying in size from 2 in. to 12 3/4 in. O.D. The small models have been tested and reported to show boundary layer stabilization and the larger models are ...


Development of Rubber-Plastic Composites for Sonar Domes.
17 JUN 1964
Authors: NAVAL APPLIED SCIENCE LAB BROOKLYN N Y                                                    
The U. S. Naval Applied Science Laboratory is developing and exploring rubber enclosed, heat and pressure cured and bonded laminated rubber-plastic composites as possible structural materials for various structural applications such as hull-mounted sonar dome windows, windows of VDS fish bodies, and sonar baffles. Physical properties studied to data have indicated, as expected that the structural properties of the composites are largely determined by the structural properties of the rigid ...


DEVELOPMENT OF HY 180/210 MARAGING STEEL FILLER METALS AND JOINING PROCEDURES. PART I.
12 MAY 1964
Authors: W. A. Fragetta; K. F. Krysiak; K. E. Dorschu; UNITED STATES STEEL CORP MONROEVILLE PA                                                    
This report reviews the current status of the program to explore the effectiveness of various compositions of maraging steel filler metals and joining procedures for achieving tough weldments having a yield strength between 180 and 210 ksi. The status of two development activities are covered: (1) improved MIG filler metals and (2) improved joining techniques. These studies have included the evaluation of 18% Ni-Co-Mo and 12% Ni-Cr-Mo maraging steels. In ...


STRUCTURAL DESIGN OF VIEWING PORTS FOR OCEANOGRAPHIC VEHICLES
MAR 1963
27 pages
Authors: James A. Nott; DAVID TAYLOR MODEL BASIN WASHINGTON DC                                                    
A design procedure for the reinforcement of viewing port openings in spherical shells for deep-diving oceanographic vehicles is presented. This procedure is based on the concepts of membrane deflection and zero rotation of the spherical head to the viewing port intersection. A small model was tested to determine the validity of the developed procedure. Strain measurements indicated that no appreciable bending occurred and that the structure reacted in a highly ...


JUNK BLUE BOOK. A HANDBOOK OF JUNKS OF SOUTH VIETNAM (HAI THUYEN THANH THU. QUYEN SACH VE HAI-THUYEN XU-DUNG TRONG MIEN NAM VIETNAM)
06 AUG 1962
423 pages
Authors: COMBAT DEVELOPMENT AND TEST CENTER (VIETNAM)                                                    
The Junk Blue Book is a compilation of processed field data recently collected on South Vietnamese junks. It is believed to be the first document of its type prepared since 1949 when Voiliers d'Indochine was published in Saigon. That book has become largely obsolete because of the sweeping changes that have occurred in the Vietnamese maritime scene since the end of World War II. A large part of the 800 ...


CONCEPT STUDY FOR A TRACKED AMPHIBIAN PERSONNEL AND CARGO CARRIER (LVTPX11) VOLUME I.
15 NOV 1961
Authors: FOOD MACHINERY AND CHEMICAL CORP SAN JOSE CALIF                                                    
Contents: Technical report -- General, Maximum armored vehicle, Maximum water performance vehicle, Development areas, Performance, Hull, Machinery, Suspension, Water propulsion, Controls, Subsystems, Stability and trim Transportability, and Vehicle family.


TRACKED AMPHIBIAN PERSONNEL AND CARGO CARRIER. PROPOSED AS MARINE ASSAULT CARRIER (MAC), VOLUME I.
15 NOV 1961
Authors: INGERSOLL KALAMAZOO DIV BORG-WARNER CORP                                                    
Contents: Design philosophy; Performance analysis; Hull; and Power train.


TRACKED AMPHIBIAN PERSONNEL AND CARGO CARRIER.
02 NOV 1961
Authors: CHRYSLER CORP DETROIT MICH                                                    
While the requirement to produce a vehicle concept of not more than 35,000 pounds gross weight has been given maximum attention, the mission requirements of the vehicle have been kept in mind, particularly with regard to armor protection. It is our opinion that in order to provide the Bureau of Ships and the Marine Corps a vehicle having an acceptable degree of armor protection, a 40,000 pound configuration might offer ...


DEVELOPMENT CHARACTERISTICS FOR TRACKED AMPHIBIAN PERSONNEL AND CARGO CARRIER BY HYDRONAUTICS, INC. (SUPPLEMENTAL INFORMATION).
NOV 1961
Authors: PACIFIC CAR AND FOUNDRY CO RENTON WASH                                                    
Investigations were directed toward reducing the hull resistance, and increasing the propulsive efficiency of propelling means of a generalized, barge-form, track-laying vehicle, with a minimum of restrictive conditions placed on their method of attaining the ends. When compared with the basic model, the bow change reduced the resistance at 7 MPH by 50%, while the modified 5 foot transom stern alone gave a 25% reduction. Other changes such as the ...


DEVELOPMENT AND MODEL TESTS OF AN EFFICIENT PLANING HULL DESIGN,
APR 1959
Authors: Eugene P. Clement; DAVID TAYLOR MODEL BASIN WASHINGTON D C                                                    
A hull form for a stepless planing boat was designed, based upon an analysis of the results of resistance tests of a number of previous designs, and also taking into consideration the features desirable for good steering qualities and good rough-water performance. A model was built and tested, and the results were compared with the resistance data from designs which had been previously tested at the Model Basin. This comparison ...


THE TABULATION OF MICHELL'S FUNCTION,
APR 1958
Authors: Garrett Birkhoff; Rohit Parikh; HARVARD UNIV CAMBRIDGE MA                                                    
SHIPBOARD CRANES AND BURTONING GEAR. EVALUATION OF CARGO HANDLING EQUIPENT IN THE LIBERTY SHIP MODERNIZATION PROGRAM.
JAN 1957
Authors: NATIONAL ACADEMY OF SCIENCES - NATIONAL RESEARCH COUNCIL WASHINGTON D C                                                    
LETHAL RANGE OF WIGWAM TARGETS BASED ON HULL RESPONSE AND APPLIED PRESSURE MEASUREMENTS,
JUN 1956
Authors: G. Chertock; A. E. Hirsch; R. W. Mayo; T. F. Ogilvie; DAVID TAYLOR MODEL BASIN WASHINGTON DC                                                    
The external pressures applied to the three SQUAW targets in Operation Wigwam were measured with pressure gages, and the deformations of the hull were measured with strain and displacement gages. The results indicate that SQUAW-12 was at a horizontal range of 5150 ft and a depth of 290 ft; the peak shock pressure at the hull was about 850 psi and the target destroyed, probably within 10 msec. SQUAW-13 was ...


DYNAMIC LOADING OF A MOTOR TORPEDO BOAT (YP 110) DURING HIGH-SPEED OPERATION IN ROUGH WATER,
SEP 1949
Authors: Norman H. Jasper; DAVID TAYLOR MODEL BASIN WASHINGTON DC                                                    
Pressures and strains were measured on the hull of a motor torpedo boat (YP110, Ex PT8) during rough-water operation in order to establish design criteria for hull plating and local structure. The most severe loading due to wave forces occurred between the forward quarterpoint and the midship section. The highest maximum effective pressure for this boat was 36 psi. In order to determine the effective pressures the solution is given ...


Tests of Twenty Related Models of V-Bottom Motor Boats. E. M. B. Series 50 for the David Taylor Model Basin,
MAR 1949
Authors: STEVENS INST OF TECH HOBOKEN NJ EXPERIMENTAL TOWING TANK                                                    
OPERATION CROSSROADS. U.S.S. BARROW (APA61). TEST ABLE
1946
50 pages
Authors: JOINT TASK FORCE ONE  WASHINGTON DC                                                    
OPERATION CROSSROADS. U.S.S. BLADEN (APA63). TEST ABLE
1946
39 pages
Authors: JOINT TASK FORCE ONE  WASHINGTON DC                                                    
OPERATION CROSSROADS. U.S.S. LST 545 TEST ABLE
1946
27 pages
Authors: JOINT TASK FORCE ONE  WASHINGTON DC                                                    

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