| Workshop on Aerospace Materials for Extreme Environments |
Dec-2009 |
|
| Authors:
William G Fahrenholtz; Gregory E Hilmas; Erica Corral; Laura Riegel; MISSOURI UNIV-ROLLA DEPT OF MATERIALS SCIENCE AND ENGINEERING
|
 | This report summarizes the activities that were conducted as part of the AFOSR Workshop on Aerospace Materials for Extreme Environments that was held August 3-5, 2009 in Clayton (St. Louis), MO. The workshop brought together -80 participants from universities, government laboratories, and companies from around the world. The agenda included 28 invited presentations and 23 additional posters on the current status and latest research results related to the fundamental science ... |
|
| Rolling Contact Fatigue Life and Spall Propagation Characteristics of AISI M50, M50 NiL, and AISI 52100. Part 1. Experimental Results (Preprint) |
Oct-2009 |
49 pages |
| Authors:
Nelson H Forster; Lewis Rosado; Kevin L Thompson; Jason W Cooke; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE
|
 | This paper is the first part of a three-part series which investigates the rolling contact fatigue (RCF) initiation and spall propagation characteristics of three bearing materials, namely AISI 52100, VIM-V AR AISI M50, and VIM-V AR M50NiL steels. Although there is substantial prior work published on the rolling contact fatigue initiation of these materials, little has been published on their spall propagation characteristics after spall initiation. It is recognized that ... |
|
| Rolling Contact Fatigue Life and Spall Propagation Characteristics of AISI M50, M50 NiL, and AISI 52100. Part 3. Metallurgical Examination (Preprint) |
Oct-2009 |
30 pages |
| Authors:
Nelson H Forster; Lewis Rosado; William P Ogden; Hitesh K Trivedi; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE
|
| This is the third part of a three-part series which investigates the rolling contact fatigue initiation and spall propagation characteristics of three bearing materials, namely AISI 52100, VIM-VAR M50, and VIM-VAR M50 NiL steels. While there is substantial prior work published on the rolling contact fatigue initiation of these materials, little is known about their spall propagation characteristics after spall initiation. In Part III, 208 size, 40 mm bore bearings ... |
|
| Attempts to Create Ball Lightning with Triggered Lightning |
Oct-2009 |
33 pages |
| Authors:
Jonathan D Hill; Martin A Uman; Michael Stapleton; Douglas M Jordan; Alexander M Chebaro; Christopher J Biagi; FLORIDA UNIV GAINESVILLE DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| During the 2008 ball lightning experiment, around 100 different material samples were exposed to both relatively continuous (initial stage and inter-stroke continuing current) and to impulsive (return stroke) triggered lightning current. All events with properties similar to those reported by eye-witness and laboratory accounts of ball lightning were produced by slowly varying, relatively low amplitude currents during the initial stage of the triggered-lightning process. No events with sustained luminosity duration ... |
|
| Advanced Energetic Materials for Agent Defeat: Impact-Driven Reactions in Biocidal Reactive Materials for Weapons of Mass Destruction (WMD) Applications |
Sep-2009 |
11 pages |
| Authors:
S Bless; M Pantoya; R Russell; TEXAS UNIV AT AUSTIN INST FOR ADVANCED TECHNOLOGY
|
| Dynamic thermite reactions can produce hot iodine gas, which can destroy spore-forming bacteria. Initial experiments have demonstrated kill ratios of up to 0.9999. |
|
| Design and Prove-Out of a Material Tracking System With a Pad Printer and Laser Etcher System |
Aug-2009 |
61 pages |
| Authors:
Daniel Spicer; Tasha Roe; Jeff Hamby; Mark Powers; Lyle Sykes; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL NJ MUNITIONS ENGINEERING TECHNOLOGY CENTER
|
| A Material Tracking System and Bar-coding System was procured and installed at Kansas Army Ammunition Plant (KSAAP) as part of the Flexible Load, Assembly, and Pack (LAP) facility contract. The material tracking system uses a software program called Inventory Management, Process and Control Tracking System (IMPACTS) to provide paperless control of material on a production line. The bar-coding system consists of pad printers that apply 'blocks' of paint on the ... |
|
| Investigation of ELF Signals Associated with Mine Warfare: A University of Idaho and Acoustic Research Detachment Collaboration |
30-Jun-2009 |
69 pages |
| Authors:
Dennis Sullivan; Jeffrey L Young; Robert G Olsen; Christopher L Wagner; IDAHO UNIV MOSCOW
|
| The questions that are being asked in this investigation are: (1) once an ELF signal is generated, how far does it propagate and still be detectable and (2) how can such signals be modeled, excited and measured? To this end, the scenario considered is one in which an ELF source of the electric or magnetic kind is located in or above water, such as a lake or ocean. This source ... |
|
| The Effect of Ignition Techniques on a Capillary Discharge Based Pulsed Plasma Thruster |
25-Jun-2009 |
14 pages |
| Authors:
A P Pancotti; M R Gilpin; M Young; ENGINEERING RESEARCH AND CONSULTING INC (ERC INC) EDWARDS AFB CA
|
| In order to better understand the operating characteristics of a capillary discharge based electrothermal pulsed plasma source, a variety of ignition techniques were investigated to determine performance effects and viability in a real system. Discharge current profiles along with thrust and specific impulse measurements were obtained to take a detailed look at ignition caused by an exploding wire, the Paschen breakdown of gas, and a surface flashover caused by the ... |
|
| Defense Management: Observations on DOD's Fiscal Year 2010 Budget Request for Corrosion Prevention and Control |
01-Jun-2009 |
22 pages |
| Authors:
GOVERNMENT ACCOUNTABILITY OFFICE WASHINGTON DC
|
| This report formally transmits the attached briefing in response to section 2228(e) of title 10 of the United States Code (see enclosure I). The statute requires the Comptroller General to provide an analysis of the Department of Defense's budget submission for corrosion prevention and control, as well as an analysis of the corrosion report accompanying defense budget materials, and provide the results to the congressional defense committees within 60 days ... |
|
| Transport Imaging: Developing an Optical Technique to Characterize Bulk Semiconductor Materials for Next Generation Radiation Detectors |
Jun-2009 |
79 pages |
| Authors:
Sarah L Catalano; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Characterization of the mobility-lifetime product is critical to the development of new materials for semiconductor radiation detectors. An optical technique has been developed that allows for the direct determination of the minority carrier diffusion length, drift length, and mobility-lifetime product from a single image of the recombination luminescence in semiconductor materials. Excess carriers are generated using the electron beam in a scanning electron microscope. The charge is then drifted by ... |
|
| Evaluation of GasmetTM DX-4015 Series Fourier Transform Infrared Gas Analyzer |
Jun-2009 |
41 pages |
| Authors:
Earl Austin; Kenneth T Hoang; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD
|
| The Mobile Laboratories and Kits Team, U.S. Army Edgewood Chemical Biological Center, was funded by the Joint Product Manager for Consequence Management to perform an instrument validation and verification test of a Gasmet DX-4015 Series Fourier Transform Infrared (Gas Analyzer. This instrument was chosen for use in the National Guard Bureau's Analytical Laboratory System (NGB-ALS) Increment I Analytical Revision. The NGBALS wanted documentation on the instrument's performance and ability to ... |
|
| Naval Research Laboratory Overview |
Jun-2009 |
17 pages |
| Authors:
NAVAL RESEARCH LAB WASHINGTON DC
|
| The Naval Research Laboratory's (NRL) mission is to conduct a broadly based multidisciplinary program of scientific research and advanced technological development directed toward maritime applications of new and improved materials, techniques, equipment, systems and ocean, atmospheric, and space sciences and related technologies; perform primary in-house research for the physical, engineering, space, and environmental sciences; conduct a broadly based applied research and advanced technology development program in response to identified and ... |
|
| Defense Industrial Base Assessment: U.S. Integrated Circuit Design and Fabrication Capability |
May-2009 |
255 pages |
| Authors:
Christopher Nelson; Mark Crawford; Teresa Telesco; Brad Botwin; DEPARTMENT OF COMMERCE WASHINGTON DC BUREAU OF INDUSTRY AND SECURITY
|
| The capability to design and fabricate integrated circuit (IC) products is critical to the economic and national security of the United States. IC products are fundamental building blocks for commercial, industrial, and national security electronic systems. In recent years, there have been questions about the possible erosion of the U.S. manufacturing base and increasing reliance on offshore producers to supply microprocessors, memory chips, and other IC devices. In July 2007, ... |
|
| The U.S. Army Chemical Corps and a Future Within AFRICOM |
Mar-2009 |
93 pages |
| Authors:
Kirsten S Graf; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The United States Africa Command (USAFRICOM) was established in October 2007 to encompass all U.S. operations on the African continent under one unified command. Several African nations have a history of chemical, biological, radiological, and nuclear operations, while most countries have a history of use as dumping grounds for hazardous materials and toxic industrial materials. Africa has also suffered extreme environmental degradation due to these and other causes. The US ... |
|
| Upgrading of Existing X-Ray Photoelectron Spectrometer Capabilities for Development and Analysis of Novel Energetic NanoCluster Materials (DURIP) |
Mar-2009 |
7 pages |
| Authors:
David L Allara; PENNSYLVANIA STATE UNIV UNIVERSITY PARK
|
| This DURIP proposal was funded to upgrade an existing Kratos Ultra Axis X-ray Photoelectron Spectrometer (XPS) in the Penn State Materials Characterization Laboratory Facility as the primary objective along with an existing RHK, ultrahigh vacuum atomic force microscope (AFM) in the Allara lab as the secondary objective. These acquisitions allow new capabilities for performing experiments directed at synthesizing novel types of discrete heteroatom clusters by highly controlled vapor deposition and ... |
|
| Fatigue Variability of a Single Crystal Superalloy at Elevated Temperature (Preprint) |
Mar-2009 |
18 pages |
| Authors:
Reji John; JOHN PORTER; Ryan Morrissey; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
|
| In order to develop more accurate life prediction tools, an improved understanding of the variability within the fatigue behavior of a material is required. Recent work has shown multiple failure mechanisms that drive the variability in fatigue life of polycrystalline titanium and nickel materials. In addition, the bimodal behavior in the fatigue response is not readily apparent when only a very small number of specimens are tested at each loading ... |
|
| Virtual Coaching Agent for Team Training |
Mar-2009 |
58 pages |
| Authors:
Norman I Badler; Ben Sunshine-Hill; Catherine Stocker; PENNSYLVANIA UNIV PHILADELPHIA CENTER FOR HUMAN MODELING AND SIMULATION
|
| This effort focused on investigating the design and evaluation of an interactive software model to support technical training, as well as for use as an on-the-job task aide. The overarching goals of this research project were to: 1) Utilize motion capture technology to capture the instructional experience of a course instructor for use in the development of a virtual training environment; 2) Provide a mechanism for storing, archiving and efficiently ... |
|
| Evaluation of Six Mosquito Traps for Collection of Aedes albopictus and Associated Mosquito Species in a Suburban Setting in North Central Florida |
Mar-2009 |
12 pages |
| Authors:
D F Hoel; D L Kline; S A Allan; DEPARTMENT OF AGRICULTURE WASHINGTON DC
|
| We compared 6 adult mosquito traps for effectiveness in collecting Aedes albopictus from suburban backyards with the goal of finding a more suitable surveillance replacement for the Centers for Disease Control and Prevention (CDC) light trap. Trap selection included 2 commercial propane traps (Mosquito Magnet(TM) Professional trap and Mosquito Magnet Liberty trap), 2 Aedes-specific traps (Fay-Prince Omnidirectional trap and Wilton trap), 1 experimental trap (Mosquito Magnet-X trap), and a standard ... |
|
| Deformation and Failure of Protein Materials in Physiologically Extreme Conditions and Disease |
Mar-2009 |
15 pages |
| Authors:
Markus J Buehler; Yu C Yung; MASSACHUSETTS INST OF TECH CAMBRIDGE CENTER FOR MATERIALS SCIENCE AND ENGINEERING
|
| Biological protein materials feature hierarchical structures that make up a diverse range of physiological materials. The analysis of protein materials is an emerging field that uses the relationships between biological structures, processes and properties to probe deformation and failure phenomena at the molecular and microscopic level. Here we discuss how advanced experimental, computational and theoretical methods can be used to assess structure-process-property relations and to monitor and predict mechanisms associated ... |
|
| Development of the 2007 Chemical Decontaminant Source Document |
Mar-2009 |
|
| Authors:
Teri Lalain; Brent Mantooth; Zach Zander; Pamela Humphreys; Tom Lynn; SCIENCE APPLICATIONS INTERNATIONAL CORP GUNPOWDER MD
|
| The chemical decontaminant performance evaluation testing source document is the product of project BA06DEC414 for improved test methodology. The primary objective is to improve the rigor of existing test methods for the generation of defensible and comparable decontamination efficacy data for the quantitative determination of post-decontamination contact and vapor hazards and residual agent. Execution of these improved methods will yield higher fidelity data presented in appropriate context. The data generated ... |
|
| Corrosion Mitigation Strategies - an Introduction |
05-Feb-2009 |
72 pages |
| Authors:
Joe Curran; NATIONAL ASSOCIATION OF CORROSION ENGINEERS HOUSTON TX
|
| METHODS OF CORROSION CONTROL -- SUMMARY: Design * Materials Selection * Protective Coatings * Cathodic Protection * Modification of Environment. |
|
| Magnesium Technology and Manufacturing for Ultra Lightweight Armored Ground Vehicles |
Feb-2009 |
14 pages |
| Authors:
Kyu Cho; Paul Moy; Tomoko Sano; Kevin Doherty; Chian Yen; George Gazonas; Jonathan Montgomery; Bruce Davis; Rick DeLorme; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| The current paper summarizes magnesium alloy metallurgy and wrought manufacturing with an initial emphasis on the Elektron WE43 alloy system for lightweight armored ground vehicle applications. Engineering design factors are reviewed and initial mechanical property data are presented along with ballistic results and findings from blast simulations. Finally the future role of magnesium alloys in ultra light metallic armor is discussed in terms of material development and application. |
|
| Recursive Dispersion Relations in One-Dimensional Periodic Elastic Media |
Feb-2009 |
30 pages |
| Authors:
Ani P Velo; George A Gazonas; Erwin Bruder; Nancy Rodriquez; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| A frequency bandgap is a range of wave frequencies that are prohibited from passing through a medium. The dispersion relation, which links the frequency to the wave number, enables us to illustrate the bandgaps. In [E. H. Lee, A survey of variational methods for elastic wave propagation analysis in composites with periodic structures, in Dynamics of Composite Materials, E. H. Lee, ed., ASME, New York, 1972, pp. 122-138] and [E. ... |
|
| Utilization of Non-Destructive Tools for In-Situ Determination of Hydrogen Content in Advanced Materials |
Feb-2009 |
32 pages |
| Authors:
Angelique Lasseigne; Kamalu Koenig; David L Olson; Joshua Jackson; Brajendra Mishra; GENERATION 2 MATERIALS TECHNOLOGY LLC FIRESTONE CO
|
| OUTLINE: Introduction; Common Factor Between Electronic Tools and Hydrogen Measurement; Non-Destructive Hydrogen Content Sensors; Thermoelectric Power Measurements; Low Frequency Impedance Measurements; Results; Summary. |
|
| Chemically Accelerated Vibratory Surface Finishing (CAVSF) |
Feb-2009 |
52 pages |
| Authors:
Juergen Fischer; Bryce Mitton; Douglas Larson; Matthew Cavalli; Jessica Messer; Jennie Jorgenson; Jennifer Vein; Brian Trenbeath; Dustin Umland; Ranko Tudorovic; NORTH DAKOTA UNIV GRAND FORKS
|
| CONTENT: Introduction (Equipment - General -Test samples) * Basics (Material removal - Roughness changes - Shear stress removal - Temperature increase - Sample distribution - Different media) * End-roughness and micro structure of different C-steels * Material removal and roughness changes versus the amount of treatment solution in the bowl * Material removal and roughness changes versus pH * Comparing the performance of a commercially available acid treatment solution with ... |
|
| Advanced Spall Repair Methods and Equipment |
Feb-2009 |
62 pages |
| Authors:
Michael I Hammons; AIR FORCE RESEARCH LAB TYNDALL AIR FORCE BASE FL AIRBASE TECHNOLOGIES DIV
|
| A series of experiments were performed using five excavation methods on nominal 2-foot wide, by 2-foot long by 4-inch deep spalls. The objective of this research was to develop one or more methods that will allow field personnel to excavate and prepare a 2-foot wide by 2-foot long by 4-inch deep spall for placement of a rapid-setting repair material in fifteen minutes or less. A secondary objective was to correlate ... |
|
| Effects of Vaporized Decontamination Systems on Selected Building Interior Materials: Vaporized Hydrogen Peroxide |
Jan-2009 |
57 pages |
| Authors:
DAVID STARK; Shawn Ryan; Barry Williams; Pamela Humphreys; Louis Reiff; Zoe Hess; Monicia Hall; Mark D Brickhouse; Philip W Bartram; Zach Zander; Brent Mantooth; Teri Lalain; Blair Martin; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD RESEARCH AND TECHNOLOGY DIR
|
| To address Homeland Security needs for decontamination, the U.S. Environmental Protection Agency (EPA) established an Interagency Agreement with the U.S. Army Edgewood Chemical Biological Center (ECBC) to take advantage of ECBC's extensive expertise and specialized research facilities for the decontamination of surfaces contaminated with chemical and biological (CB) warfare agents. The National Homeland Security Research Center (NHSRC) formed collaboration with ECBC in a mutual leveraging of resources expanding upon ECBC's ... |
|
| Nanoscale Transport Optimization |
04-Dec-2008 |
33 pages |
| Authors:
Lisa M Weiland; PITTSBURGH UNIV PA
|
| A generalized modeling tool has been created that facilitates virtual design of active material systems utilizing nanoscale transport. The construct is bio-mimetic in that the stochastic nature of biological transport proteins is utilized as the basis for transport phenomena. The transport response is then coupled to host response (for instance, elastic deformation of the supporting membrane) via finite element analysis. The advantages of this construct are (1) biological transport phenomena ... |
|
| Promising New High-Explosives: Triaminoguanidinium (TAG) and Dinitramide (DN) Salts |
Dec-2008 |
11 pages |
| Authors:
Thomas M Klapoetke; Norbert Mayr; Joerg Stierstorfer; LUDWIG-MAXIMILIANS UNIV MUNICH (GERMANY) DEPT OF CHEMISTRY AND BIOCHEMISTRY
|
| High nitrogen energetic materials with astonishing thermal behaviors and performances were synthesized by different metathesis reactions. Particularly the new compound triaminoguanidinium 1-methyl-5-nitriminotetrazolate (TAG-1 Me-AtNO2, 4) shows great explosion performance and may be an alternative to commonly used and toxic RDX. An improved synthesis for the promising energetic compound 4 is also presented. The new compound TAG2-OD (trianinoguanidinium 3,3'-bis-1,2,4-oxadiazol-5-onate, 7) with an N-content of 60% and a relatively low isobaric (20 ... |
|
| Soil Microbial Activity Benchmarks (Provisional) for Ecological Risk Assessments at Explosives-Contaminated Sites: Promoting Range Sustainability |
Dec-2008 |
8 pages |
| Authors:
R G Kuperman; R T Checkai; C T Phillips; M Simini; S Dodard; J Hawari; S Rocheleau; M Joly; G I Sunahara; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD
|
| The Army Strategy for the Environment applies an ecosystem approach to managing natural resources on Army installations. It incorporates the principles of sustainability across the Army into all functional areas. We conducted investigations to develop critical data required for successful management of Army installations in a sustainable manner and for the knowledge-based decision making. Assessment and protection of the terrestrial environment at Army testing and training ranges is being advanced ... |
|
| Simulations of Simple Nanomachines in Carbon Nanotude Bundles Based on Chirality |
Dec-2008 |
8 pages |
| Authors:
D L Majure; R W Haskins; N J Lee; C R Welch; C F Cornwell; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
|
| Single-walled carbon nanotubes (CNTs) have been studied extensively since their discovery and identification by Iijima in 1993. Their impressive mechanical, electrical, and thermal properties have created new fields of study, and the benefits of this research are just beginning to be realized. One potential use of CNTs is as a foundation for nanomachines. Another possible use, one that takes advantage of their mechanical properties, is the synthesis of high-strength, low-weight ... |
|
| Fabrication and Characterization of Nanoporous Energetic Silicon |
Dec-2008 |
7 pages |
| Authors:
W Churaman; L Currano; M Dubey; C Becker; ARMY RESEARCH LAB ADELPHI MD
|
| Arising as a new class of energetic material, nanoporous energetic silicon holds great potential for applications such as fuzing and thrust generation, which require large power output. In this paper we address fabrication and material characterization as well as monolithic integration of a hotwire initiator and packaging; the first steps toward a fully integrated MEMS/IC/energetic material system. |
|
| Structural Analyses & Experimental Activities Supporting the Design of a Lightweight Rigid-Wall Mobile Shelter |
Dec-2008 |
10 pages |
| Authors:
Melvin Jee; Paul V Cavallaro; NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI
|
| Lightweight rigid-wall shelters used in mobile military operations are constructed of sandwich panels comprised of thin face sheets and thick, ultra light core materials to minimize weight and maximize structural integrity. However, such lightweight construction comes at a cost, often impacting the design and manufacturing of critical joints connecting the sandwich panels in a box-like assembly. Furthermore, joint stiffnesses are often difficult to characterize and their finite values significantly influence ... |
|
| A Shock Tube for Downselecting Material Concepts for Blast Protection. Part I: Description of the Shock Tube and a Comparison of Flush Mounted and Recess Mounted Pressure Sensors |
Dec-2008 |
27 pages |
| Authors:
Ronald A Segars; Marina G Carboni; ARMY NATICK SOLDIER RESEARCH DEVELOPMENT AND ENGINEERING CENTER MA
|
| This report documents Part I of a study on the interaction between shock waves and material systems as part of a U.S. Army initiative to better protect individual Soldiers against novel blast threats. The research was conducted using a shock tube fabricated at the U.S. Army Natick Soldier Research, Development and Engineering Center (NSRDEC). The shock tube was used because it is less expensive than explosive blasts, allows many tests ... |
|
| Extension of Viscoplasticity Based on Overstress to Capture the Effects of Prior Aging on the Time Dependent Deformation Behavior of a High-Temperature Polymer: Experiments and Modeling |
Oct-2008 |
217 pages |
| Authors:
Amber J McClung; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The inelastic deformation behavior of PMR-15 neat resin, a high-temperature thermoset polymer, was investigated at 288 degrees C. The experimental program was designed to explore the influence of strain rate on tensile loading, unloading, and strain recovery behaviors. In addition, the effect of the prior strain rate on the relaxation response of the material, as well as on the creep behavior following strain controlled loading were examined. The experimental data ... |
|
| Leadership in the Era of the Human Singularity: New Demands, New Skills, New Response |
Oct-2008 |
104 pages |
| Authors:
Barton Kunstler; ARMY WAR COLL CARLISLE BARRACKS PA CENTER FOR STRATEGIC LEADERSHIP
|
| The human singularity refers to the integration of technology into the human body so that levels of mental acuity and physical ability eclipse all previous known levels. Because of the unique character of these enhanced human specimens, they will represent a singularity in human history, something unique and to which a new set of laws may well apply. A broad front of converging core technologies, such as nanotechnology, bioengineering, supercomputing, ... |
|
| FY07 NRL DoD High Performance Computing Modernization Program Annual Reports |
05-Sep-2008 |
109 pages |
| Authors:
Portia A Shingler; Beth A Howell; NAVAL RESEARCH LAB WASHINGTON DC CENTER FOR COMPUTATIONAL SCIENCE
|
| These reports summarize the accomplishments of the NRL Principal Investigators who received computer allocations on the DoD High Performance Computing Modernization Program Shared Resource Center in FY07. |
|
| 50th Anniversary Celebration: 46th Sagamore Army Materials Research Conference on Advances and Needs in Multi-Spectral Transparent Materials Technology |
01-Sep-2008 |
170 pages |
| Authors:
James W McCauley; James M Sands; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| Since 1954, the Sagamore Army Materials Research Conference has brought together scientists and engineers from government, industry, and academia for in-depth discussions on cutting edge materials technology issues of critical importance to the U.S. Army community. The 46th Sagamore Army Materials Research Conference continued this tradition with a focus on Advances and Needs in Multi-Spectral Transparent Materials Technology. Held at the Harbourtowne Golf Resort and Conference Center, St. Michaels, MD, ... |
|
| Electronic State Distributions of YBa2Cu3O7-x Laser Ablated Plumes |
Sep-2008 |
219 pages |
| Authors:
Patrick D Kee; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Emission from YBCO laser-ablated plumes was studied to characterize the PLD process. A KrF laser was used to ablate a bulk YBCO target at oxygen pressures ranging from 50-400 mTorr. Spectra were collected for the 500-860 nm bandpass at target distances ranging from 31.4-55.0 mm. Line fluences were corrected for self-absorption, and state distributions were calculated using recently updated transition probabilities. Electronic temperatures ranged from 0.28 +/- 0.01 eV to ... |
|
| Evaluation of Impact Mitigation and Health Monitoring Tradeoffs in Composite Missile Casing Design Using Iterative Inversion Loads and Damage Identification Methods |
26-Jul-2008 |
14 pages |
| Authors:
Douglas E Adams; Jonathan White; Nick Stites; Nathan Yoder; Carlos Escobar; PURDUE UNIV LAFAYETTE IN
|
| Sensing, modeling, and data analysis techniques for health monitoring of composite missile casings (carbon filament wound and S2 glass filament wound) have been developed. Here, the term health monitoring is used to refer to both loads identification and damage identification for the purpose of assessing the material state and structural performance of a missile casing pressure vessel. Impact loads were located and quantified using a single sensor without a detailed ... |
|
| Molecular Design of Sulfonated Triblock Copolymer Permselective Membranes |
03-Jul-2008 |
|
| Authors:
Aleksey Vishnyakov; Alexander V Neimark; RUTGERS - THE STATE UNIV PISCATAWAY NJ DEPT OF CHEMICAL AND BIOCHEMICAL ENGINEERING
|
| Search for novel polymeric electrolyte membranes (PEM) suitable as permselective diffusion barriers is one of the key problems in engineering new protective materials. The goal of the project was to get a better understanding of the physical and chemical factors governing sorption and permeability of phosphoorganic agents in PEM made of sulfonated triblock copolymers of styrene and lower olefins by means of multiscale molecular simulations. These materials are of special ... |
|
| Autonomous Quality Space Imagery for LEO/GEO Space Operations |
01-Jun-2008 |
21 pages |
| Authors:
David K Geller; John McInroy; UTAH STATE UNIV LOGAN
|
| Our overall goal is to develop, implement and transfer accurate new numerical methods for solving moving boundary problems in materials science. We have three specific objectives: (1) Combine semi-Lagrangian time stepping, accurate contouring and fast geometric algorithms to develop and implement accurate, efficient and general new methods for moving sharp interfaces; (2) Develop a fast modular open source moving interface code for transfer to other researchers, labs and industry; (3) ... |
|
| Electronic Warfare for Cyber Warriors |
01-Jun-2008 |
31 pages |
| Authors:
Daniel E Rauch; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This research paper provides complete course content for the AFIT EENG 509, Electronic Warfare class. It is intended as a replacement for the existing course and designed for Intermediate Developmental Education (IDE) students in the Cyber Warfare degree program. This course provides relevant academic courseware and study material to give cyber warriors an academic and operational perspective on electronic warfare and its integration in the cyber domain. |
|
| The CREATIVE Decontamination Performance Evaluation Model |
Jun-2008 |
37 pages |
| Authors:
Erin E Shelly; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD
|
| The project objective is to develop a semi-empirical, deterministic model to characterize and predict laboratory-scale decontaminant efficacy and hazards for a range of: chemical agents (current focus on HD); operational surfaces common to ground vehicle, aircraft, equipment construction (e.g., aluminum, glass, CARC, silicone); realistic threat challenges (0.5-10 g/sq m); environmental conditions (10-40 deg C); and decontamination process parameters (Decon, residence time). The model will enable faster characterization of decontaminant performance ... |
|
| Evaluation of Synthetic Fuel in Military Tactical Generators |
JUN 2008 |
40 pages |
| Authors:
Ruben Alvarez; Edwin A. Frame; SOUTHWEST RESEARCH INST SAN ANTONIO TX BELVOIR FUELS AND LUBRICANTS RESEARCH FACILITY
|
| A program was developed to compare data on performance, fuel economy and exhaust emissions during side by-side evaluations of military tactical generator sets while using various fuels, including Fischer-Tropsch (FT) synthetic aviation kerosene fuel. The generators identified as Tactical Quiet Generators, 10kW 60 Hz, MEP-803A were provided by the Mobile Electric Power Group at Ft. Belvoir, VA. All three generators were operated on a 25-hour break-in run using Ultra-Low Sulfur ... |
|
| Development of Permeable Reactive Barriers (PRB) Using Edible Oils |
Jun-2008 |
159 pages |
| Authors:
Robert C Borden; NORTH CAROLINA STATE UNIV AT RALEIGH
|
| At the start of this project, neat and emulsified vegetable oil had been used at several different sites to simulate anaerobic biodegradation of chlorinated solvents and other contaminants in groundwater. However, little was known about the transport, retention and biodegradation of these materials in the subsurface or the impact of these materials on contaminant fate. This project included a series of laboratory, field and numerical modeling studies aimed at improving ... |
|
| Production of Optical Quality Free Standing Diamond Wafer |
19 MAY 2008 |
16 pages |
| Authors:
Mark Dubinskiy; ONYX OPTICS INC DUBLIN CA
|
| Valdosta Optics Laboratory, Incorporated (VOLI) is pursuing the capabilities of developing synthetic diamond and diamond-like materials, and integrating and implementing these materials in various applications, particularly as a high performance heat spreader for solid state laser (SSL) components, optical coatings, and active engineering materials for micro-electro-mechanical systems (MEMS) and sensors. The current focus is on three key research and development directions, namely: 1) optical quality, highly oriented polycrystalline diamond (PCD) ... |
|
| Studies of Real Roughness Effects for Improved Modeling and Control of Practical Wall-Bounded Turbulent Flows |
22 APR 2008 |
183 pages |
| Authors:
Kenneth T. Christensen; Yanhua Wu; ILLINOIS UNIV AT URBANA-CHAMPAIGN DEPT OF MECHANICAL SCIENCE AND ENGINEERING
|
| The present effort investigates the effects of practical roughness replicated from a turbine blade damaged by deposition of foreign materials or statistical and structural characteristics of wall turbulence. Two-dimensional particle image velocimetry (PIV) measurements are performed in the streamwise-wall-normal plane of turbulent boundary layers at momentum Reynolds numbers of 8000 and 13000. The surface conditions include a smooth wall and two highly-irregular rough walls. These rough surfaces have the same ... |
|
| Thick Film Metastable Materials via Laser Processing |
18 APR 2008 |
7 pages |
| Authors:
Craig B. Arnold; PRINCETON UNIV NJ
|
| Over course of this project, the objective has evolved based on the results obtained. In the original proposal, our objective was basically to study the interaction between the incident laser and the multiphase materials that are used in laser direct write deposition in order to produce metastable phases of materials for improved performance in a variety of applications such as energy storage and corrosion resistant systems. Based on our results ... |
|
| Multiscale Modeling and Computation of Liquid Crystal Polymers, Polymer Blends, and Polymer Nanocomposites: Investigation of Rheology and Material Properties |
15 APR 2008 |
11 pages |
| Authors:
Qi Wang; FLORIDA STATE UNIV TALLAHASSEE DEPT OF MATHEMATICS
|
| High-performance polymeric materials such as liquid crystal polymers and polymer nano-particle composites have many military applications. The project aimed to study the mesoscopic structure formation during flow processing and characterization of material properties in solid states. Significant progress has been made to model the materials and to understand their rheological properties in melt or solution processing. Electrical and thermal conduction properties of the nanocomposites are characterized by the low volume ... |
|
Reports by Keyword(s)
MATERIALS
