| Brick Paving Systems in Expeditionary Environments: Field Testing |
Jul 2012 |
101 pages |
| Authors:
Haley P Bell; Quint Mason; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS GEOTECHNICAL AND STRUCTURES LAB
|
 | Personnel of the U.S. Army Engineer Research and Development Center were tasked by Headquarters, Air Force Civil Engineer Support Agency, to determine the feasibility of using face bricks as an alternative to concrete or asphalt paving for low-volume roads and military aircraft parking aprons in expeditionary environments. Because paving materials and equipment can be scarce in these areas, the use of recycled bricks from existing infrastructure might provide a local ... |
|
| Putting Lives on the Line: The Fast Rope Glove Challenge |
Jun 2012 |
29 pages |
| Authors:
Noel J Trew; John D Camping; Robert A Lee; Corey R Bean; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN EFFECTIVENESS DIRECTORATE
|
| To protect their hands from rope friction burns during Fast Rope insertions, US troops must wear bulky leather outer gloves on top of their tactical gloves. This makes it difficult for them to operate their weapons and other pieces of kit once on the ground. This evaluation examines some possible candidate materials that may be used to make one pair of gloves for both the fast rope descent and for ... |
|
| C-5 Corrosion Program 2011 |
Aug 2011 |
40 pages |
| Authors:
Dan McTish; LOCKHEED MARTIN AERONAUTICS CO PINELLAS PARK FL
|
| Presentation Overview: Corrosion Program Team, Corrosion Control Website, Corrosion Program Concerns, Non-Chrome Paint System Evaluations, Coatings for Abrasion Protection, Plastic Media Blasting for Paint Removal, Material Changes to Resolve Corrosion and SCC Issues, Aircraft Wash Procedure Development, Av-Dec Tape/Gasket Usage, Lavatory Modification to Resolve Leaks, Structural Grind-Out Limitations for Surface Corrosion, Structural Bonding Process and Certification, CPC Usage, C-5M Refurbishment and Anti-Skid Removal Evaluation. |
|
| Optimized Deposition Parameters & Coating Properties of Cobalt Phosphorus Alloy Electroplating for Technology Insertion Risk Reduction |
Oct 2010 |
51 pages |
| Authors:
Ruben Prado; John Benfer; Diana Facchini; Keith Legg; NAVAL AIR SYSTEMS COMMAND JACKSONVILLE FL
|
| Optimized plating deposition parameters were obtained using a Design of Experiment (DOE) approach. These parameters were validated through supplemental testing and found to be non-embrittling with improved fatigue and neutral salt fog corrosion performance as compared to hard chromium electroplate. The nCoP deposit did exhibit reduced hardness (560 VHN) and reduced taber wear abrasion performance as compared to hard chromium electroplate. Producibility evaluations were performed utilizing a J52 Shaft section ... |
|
| Thermal Diffusion Galvanizing or TDG: A Cost Effective, Environmentally Friendly Process |
Feb-2009 |
21 pages |
| Authors:
Moshe Moked; DISTEK N A LLC ELK GROVE VILLAGE IL
|
| CONCLUSION: TDG allows for the deposition of a highly corrosion and abrasion resistant, non-toxic non-polluting zinc/iron alloy on practically any part to thicknesses ranging from 10 to 300 microns cleanly, efficiently and uniformly. TDG vastly increases the service life of steel parts, in a safe, environmentally friendly process without regards to geometry or complexity. |
|
| Plasma-Arc Deposited Elemental Boron Film for use as a Durable Nonstick Coating |
SEP 2007 |
27 pages |
| Authors:
C. C. Klepper; HY-TECH RESEARCH CORP RADFORD VA
|
| Report developed under Small Business Innovation Research Contract. Under this Phase I SBIR contract, HY-Tech Research performed development of an abrasion resistant, non-stick coating for cookware used by the U.S. Army in the field. The deposition technique uses a vacuum arc source of elemental boron, a high-temperature material with excellent hardness, lubricity and chemical inertness. HY-Tech's boron arc source is based on the vacuum (cathodic) arc process, which produces the ... |
|
| Ionic Liquid Lubrication of MEMS Devices: An AFM Based Analysis and Evaluation on Test Devices (Preprint) |
DEC 2006 |
33 pages |
| Authors:
Jose Naninaparampil; Kalathil C. Eapen; Andrey A. Voevodin; Jeffrey H. Sanders; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
|
| Lubrication of Micro Electro Mechanical Systems (MEMS) became very important as the devices became complex and more and more parts had interacting areas. In previous reports, self-assembled monolayers and long chains of flurocarbons were used to lubricate MEMS components with significant success. In this report, a method based on atomic force microscopy is described that measures and compares ionic liquid lubricity. Effect of ring structure is studied in the case ... |
|
| Aromatic Nylons for Transparent Armor Applications |
NOV 2006 |
9 pages |
| Authors:
John W. song; Joel Lofgren; Kyle D. Hart; Nick Tsantinis; Roy Paulson; Jay N. Hatfield; ARMY NATICK RESEARCH DEVELOPMENT AND ENGINEERING COMMAND MA NATICK SOLDIER CENTER
|
| Failure and kinetic energy absorption mechanisms upon ballistic impact of two new types of nylons, TROGAMID T-5000 (T-5000) and TROGAMIDCX7323 (CX-7323) as well as traditional materials such as polycarbonate (PC) and polymethylmethacrylate (PMMA) were examined and compared. Under ballistic impact, T-5000 showed brittle failure similar to PMMA, while CX-7323 exhibited ductile behavior similar to PC. Like PC and PMMA, the failure modes of T-5000 and CX-7323 are different from each ... |
|
| Medical Surveillance Monthly Report (MSMR). Volume 12, Number 4, May/June 2006 |
Jun-2006 |
21 pages |
| Authors:
ARMED FORCES HEALTH SURVEILLANCE CENTER SILVER SPRING MD
|
| Competent immune function and intact skin are effective defenses against pathogenic microorganisms. However, breakdowns of the physical integrity of skin (e.g., punctures, lacerations, abrasions, blisters, ulcers, stings) are common among military members. Such breakdowns can allow infectious agents (e.g., Staphylococcus aureus, Streptococcus pyogenes) to invade and proliferate in underlying tissues. Cellulitis and abscesses are the clinical expressions of such infections. Diseases of the skin and subcutaneous tissue (ICD-9-CM: 680-709) was ... |
|
| Vectran Fiber Time Dependant Behavior and Additional Static Loading Properties |
NOV 2004 |
22 pages |
| Authors:
Russell B. Fette; Marjorie F. Sovinski; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION GREENBELT MD GODDARD SPACE FLIGHT CENTER
|
| Vectran HS appears from literature and testing to date to be an ideal upgrade from Kevlar braided cords for many long-term, static-loading applications, such as tie-downs on solar arrays. Vectran is a liquid crystalline polymer that exhibits excellent tensile properties. The material has been touted as a zero creep product. The testing discussed in this report does not support this statement, though the creep is on the order of four ... |
|
| Simulation of Reaction Dynamics for Synthesis of Energetic Materials and Resistant Coatings |
10 MAR 2004 |
14 pages |
| Authors:
Sharon Hammes-Schiffer; PENNSYLVANIA STATE UNIV UNIVERSITY PARK OFFICE OF SPONSORED PROGRAMS
|
| The objective of this research was the development of theoretical and computational methods to guide the efficient synthesis of HEDM (High Energy Density Matter) for use in advanced propellants and POSS (polyhedral oligomeric silsesquioxanes) for use in coatings resistant to extreme conditions such as heat and abrasion. The research centered on the design of new methodology for the simulation of hydrogen transfer reactions. The projects included the development of the ... |
|
| Materials Research Society Symposium Proceedings Volume 740 Held in Boston, Massachusetts on December 2-6, 2002. Nanomaterials for Structural Applications |
FEB 2003 |
462 pages |
| Authors:
Christopher C. Berndt; Traugott E. Fischer; Ilya Ovid'ko; Ganesh Skandan; Thomas Tsakalakos; MATERIALS RESEARCH SOCIETY WARRENDALE PA
|
| This volume contains selected papers presented at the symposium whose thematic sessions covered nanostructured bulk materials, films, coatings and nanocomposites. These new materials are now being introduced in structural applications, such as wear resistance, plastic forming, and other load bearing applications, Nanophase or nanocrystalline materials are also being used in electronics, refractory, biological and catalytic applications, Progress in a wide range of structural applications for nanomaterials crucially depends on the ... |
|
| Hardness and Abrasion Resistance of Nanocrystalline Nickel Alloys Near the Hall-Petch Breakdown Regime |
2003 |
6 pages |
| Authors:
Christopher A. Schuh; T. G. Nieh; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF MATERIALS SCIENCE AND ENGINEERING
|
| The breakdown of classical Hall-Petch scaling remains an area of scientific interest, and will govern the limiting strength of nanocrystalline alloys for structural applications. In this work we discuss the hardness and scratch resistance of nanocrystalline nickel and nickel-tungsten solid solution alloys, assessed through nanoindentation and nano-scratch techniques. The materials have been prepared by electrodeposition, and are fully dense with grain sizes between 6 and 22 nm. In this range ... |
|
| An Evaluation of Application and Surface Preparation Parameters for Thermal Spray Coatings |
NOV 2001 |
313 pages |
| Authors:
Dominic J. Varcalle Jr.; Alfred D. Beitelman; ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN IL CONSTRUCTION ENGINEERING RESEARCH LAB
|
| The U.S. Army Corps of Engineers uses thermal-sprayed zinc and aluminum coatings on hydraulic structures exposed to severe impact and abrasion damage caused by ice and floating debris. These coatings are also used widely for corrosion prevention on civil engineering structures across the nation. An experimental study of the twin-wire electric arc (TWEA) spraying of zinc and aluminum coatings was conducted to demonstrate the suitability of this technology for Army ... |
|
| Evaluation of Surface Preparation and Application Parameters for Arc- Sprayed Metal Coatings |
JUL 2001 |
105 pages |
| Authors:
Alfred D. Beitelman; William Corbett; ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN IL CONSTRUCTION ENGINEERING RESEARCH LAB
|
| The U.S. Army Corps of Engineers uses an 85:15 zinc:aluminum alloy coating on hydraulic structures exposed to severe environments, such as those areas on a structure subject to impact and abrasion damage caused by ice and floating debris. Properly applied coatings of this type have lasted 8 to 10 years. However, the Corps has experienced premature failure of these systems due to inappropriate surface preparation and application procedures. Much advancement ... |
|
| Simulation of Reaction Dynamics: Nonadiabatic and Solvation Effects |
09 JAN 2001 |
8 pages |
| Authors:
Sharon Hammes-Schiffer; NOTRE DAME UNIV IN OFFICE OF RESEARCH
|
| This research involved four projects centered on the design of theoretical and computational approaches to predict promising energetic materials and to guide the efficient synthesis of these materials. First, mixed quantum/classical methodology was developed for the simulation of photochemical reactions, which could play an important role in the design and synthesis of energetic materials. Second, the time-dependent self-consistent-field reaction path Hamiltonian method was developed for the calculation of the real-time ... |
|
| Engineering Investigation of Failures of Cable Used to Tow the TDU-32A Banner Target from T2C Aircraft |
06 DEC 2000 |
96 pages |
| Authors:
Brent Meeker; NAVAL AIR WARFARE CENTER WEAPONS DIV POINT MUGU CA
|
| Twice in May of 2000, cables used to tow TDU-32A target banners broke while being towed by T2C aircraft of VT-9 flying out of Meridian MS. There had been two similar incidents in the preceding 20 months. In each case the cable broke about thirteen feet aft of the tow point on the aircraft and the banner portion of the cable was not recovered. The breaks occurred or were first ... |
|
| Physical Data Collection for Lock Wall Deterioration |
NOV 2000 |
130 pages |
| Authors:
Robert C. Patev; Paul F. Mlakar; Larry M. Bryant; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS INFORMATION TECHNOLOGY LAB
|
| A multifaceted study was performed as part of the Upper Mississippi River Illinois Waterways Navigation Study (UMR-IWW) to gather unknown or previously estimated data to assist with studying the deterioration and loss of concrete from lock walls. This effort revolved around physically monitoring barge traffic in lock chambers with time-lapse video equipment as well as measuring the actual losses from lock wall surfaces to determine the critical parameters needed for ... |
|
| Contact Mechanics of FGM Coatings |
OCT 2000 |
276 pages |
| Authors:
Fazil Erdogan; Mehmet A. Guler; LEHIGH UNIV BETHLEHEM PA
|
| The concept of grading the thermo-mechanical properties of materials provides an important tool to design new materials for certain specific functions. To take full advantage of this new tool research is needed not only for developing efficient processing methods and material characterization techniques but also for carrying out basic mechanics studies relating to the safety and durability of the FGM components. These studies may help to protect certain components against ... |
|
| Investigation into Acrylic Paint Cracking (APC) on Asphaltic Pavements |
JAN 2000 |
27 pages |
| Authors:
C. D. Gaughen; NAVAL FACILITIES ENGINEERING SERVICE CENTER PORT HUENEME CA
|
| The objective of this effort was to investigate Acrylic Paint Cracking (APC) on asphaltic pavements and to identify an APC coating solution. The investigation consisted of the following: 1) Site visits to asphaltic airfields, roads, and parking lots, 2) Field testing of Asphaltic Concrete (AC) and AC wearing surfaces, 3) Field and laboratory testing of six acrylic paints, and 4) Analysis of paint stresses. Findings ... |
|
| Medical Surveillance Monthly Report (MSMR). Volume 5, Number 6, August/September 1999 |
Sep-1999 |
21 pages |
| Authors:
Mark V Rubertone; John F Brundage; Kimmie F Kohlhase; Robert F DeFraites; ARMED FORCES HEALTH SURVEILLANCE CENTER SILVER SPRING MD
|
| The nature and severity of eye injuries depend on physical characteristics of impacting objects (e.g., mass, size, speed, hardness, sharpness), locations of impacts, and predispositions of the eye to various injuries. Corneal abrasions are the most common eye injury. They occur when small foreign objects (e.g., sand, twigs, wood shavings, metal particles) scratch the cornea. Objects with more momentum and sharpness can lacerate eyes or eyelids and create open wounds. ... |
|
| An Evaluation of Application and Surface Preparation Parameters for Thermal Spray Coatings |
AUG 1999 |
332 pages |
| Authors:
Dominic J. Varcalle Jr.; Alfred D. Beitelman; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| The U.S. Army Corps of Engineers uses thermal sprayed zinc and aluminum coatings on hydraulic structures exposed to severe impact and abrasion damage caused by ice and floating debris. These coatings are also used widely for corrosion prevention on civil engineering structures across the nation. An experimental study of the twin wire electric arc (TWEA) spraying of zinc and aluminum coatings was conducted to demonstrate the suitability of this technology ... |
|
| Ground-Fault Protection on Construction Sites |
1998 |
33 pages |
| Authors:
DEPARTMENT OF LABOR WASHINGTON DC OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION
|
| With the wide use of portable tools on construction sites, the use of flexible cords often becomes necessary. Hazards are created when cords, cord connectors, receptacles, and cord and plug-connected equipment are improperly used and maintained. Generally, flexible cords are more vulnerable to damage than is fixed wiring. Flexible cords must be connected to devices and to fittings so as to prevent tension at joints and terminal screws. Because a ... |
|
| Edge-Abrasion Resistance and Chemical Agent Resistance of a Radiation Modified Polyurethane Elastomer |
SEP 97 |
|
| Authors:
Dawn M. Crawford; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
 | This report provides a summary of research performed by the University of Maryland, College Park, under contract no. DAAH-O4-95-00O4. Through the contractural agreement, a commercial thermoplastic polyurethane (TPU) elastomer was modified using radiation treatment and evaluated for edge- abrasion resistance. Treated and untreated TPU were also submitted for chemical agent testing. Although the modification did not result in improved chemical agent resistance, mass loss due to edge abrasion was decreased ... |
|
| Non-Toxic, Self-Cleaning Silicone Fouling Release Coatings |
JUN 97 |
4 pages |
| Authors:
James A. Cella; GENERAL ELECTRIC CORPORATE RESEARCH AND DEVELOPMENT NISKAYUNA NY
|
| Because Duplex coatings containing silicone oils encapsulated with hard Thermoset wall materials exhibit poor abrasion resistance and a high degree of fouling, two microcapsule manufacturers have been identified for preparation of gel wall microencapsulations. A carbinol terminated PDMS and two ablative oils were synthesized for use in the compositions downselected for panel preparation for subcontractor sites. Twelve panels of each of twelve downselected formulations and a control were prepared, by ... |
|
| Combat Ration Advanced Manufacturing Technology Demonstration (CRAMTD): Leak Detector Implementation (Short Term Project (STP) #75) |
APR 97 |
66 pages |
| Authors:
Henderikus Bruins; Theodore Descovich; Ibrahim Laham; Neal Litman; RUTGERS - THE STATE UNIV NEW BRUNSWICK NJ CENTER FOR ADVANCED FOOD TECHNOLOG Y
|
| There is currently a requirement for two 100% inspections, pre- and post-retorting in each plant producing retorted MRE pouches, looking for cuts, holes, surface defects and seal leaks. In spite of this significant investment in manpower for the inspection tasks, the final rate of rejection of lots is high. Based on USDA and AVI pouch inspection data, the MRE entree types expected to show the greatest production growth also have ... |
|
| Surface Quality Impact of Replacing Vapor Degreasers with Aqueous Immersion Systems |
MAR 97 |
87 pages |
| Authors:
C. Kodres; D. Polly; T. Hoffard; G. Anguiano; ENVIRONMENTAL PROTECTION AGENCY CINCINNATI OH RISK REDUCTION ENGINEERING LAB
|
| With effective vapor degreasing solvents environmentally suspect, other methods of cleaning metal surfaces must be used. Aqueous immersion cleaning, currently the preferred method for intermediate, lighter duty cleaning, is a promising alternative for precleaning and degreasing. Alkaline cleaners are the principal aqueous cleaner group and represent the most workable, broad substitute for vapor degreasers. The efficiencies of aqueous immersion degreasing and vapor degreasing for removing contaminants from an aluminum surface ... |
|
| Radiation Curing of Fabric Reinforced Elastomeric Composites |
26 FEB 97 |
104 pages |
| Authors:
Walter J. Chappas; Feng-Jon Chang; Joseph Silverman; MARYLAND UNIV COLLEGE PARK
|
| Ionizing radiation from cobalt-6O gamma and electron beam sources are used to investigate methods to improve the abrasion resistance of polyurethane elastomers. Radiation curing of acrylated urethane oligomers and grafting acrylonitrile onto polyurethanes were studied. Low energy electron beam and plasma surface treatment was also performed. A special device was developed to measure edge abrasion, ie. the abrasion of folded surface. This work demonstrated that radiation grafting techniques are an ... |
|
| Structure-Property Behavior of Organic-Inorganic Hybrid Materials Based on Sol Gel Chemistry |
06 DEC 96 |
95 pages |
| Authors:
Garth L. Wilkes; VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF CHEMICAL ENGINEER ING
|
| This work was directed at the synthesis and structure-property behavior of hybrid organic-inorganic network materials prepared by a sol gel reaction. Specific focus concerned the development of optically abrasion resistant coatings that could be utilized for both polymeric and metallic substrates. In the case of the latter, the purpose of the coating was to not only to supply abrasion resistance but, if possible, provide corrosion resistance as well. Considerable success ... |
|
| Surface Preparation for Bonding Iron. |
16 JUL 1996 |
|
| Authors:
Wayne C. Tucker; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| The present invention relates to an improved etchant for iron materials and a method for etching iron materials. The etchant is an aqueous solution of ferrous chloride and phosphoric acid. The etchant preferably consisting of essentially of 20.6 gm FeCl2-4H2O, 88 ml H3PO4 (concentrated 85%) and deionized water sufficient to make a 500 ml solution total. The method of etching includes the steps of preparing the surface of the iron ... |
|
| Process Monitoring and Control of Aluminum Anodizing Solutions by Ion Chromatography |
MAY 96 |
16 pages |
| Authors:
Samuel Sopok; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS
|
| Process monitoring and control of sulfuric and oxalic acids in aluminum anodizing solutions are necessary to produce high-quality coatings for the metal finishing industry efficiently. These high-quality coatings significantly increase resistance to corrosion, wear, and abrasion. The production of military armament system parts requires narrow aluminum anodizing solution tolerances, which increases the need for process monitoring and control. Current instrumental analysis methods do not provide acceptable 95% confidence level precisions ... |
|
| Abrasion Resistant, Volatile Organic Compound (VOC) Compliant Coatings for Hydraulic Structures |
FEB 96 |
91 pages |
| Authors:
Alfred D. Beitelman; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| The Corps of Engineers has used solution vinyl paints for the corrosion protection of hydraulic structures on inland waterways for many years. These coatings have an excellent service life; however, the liquid paint contains high quantities of solvents. To comply both with existing and anticipated pollution regulations, it is necessary to evaluate potential coatings to replace those currently used. Ten elastomeric polyurethanes were tested in the laboratory; six were recommended ... |
|
| AASERT: Fracto-Emission from Metal Ceramic Interfaces. |
20 DEC 1995 |
4 pages |
| Authors:
J. T. Dickinson; WASHINGTON STATE UNIV PULLMAN
|
| A description of the scope of work and important results from AASERT funding is presented. The major areas of sutdy included the types of defects produced by mechanical deformation, fracture, polishing, and abrasion on inorganic single crystals and polymer surfaces and the way these defects interacted with UV laser irradiation. The use of photoluminescence to quantitatively and spatially characterize these defects is described. The role of such defects in the ... |
|
| Long-Term Field Test Results for Polyvinyl Chloride (PVC) Roofing |
DEC 1995 |
58 pages |
| Authors:
Walter J. Rossiter Jr.; James A. Lechner; David M. Bailey; Stuart D. Foltz; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| The U.S. Army Construction Engineering Research Laboratories (USACERL) has recently completed a 10-year field exposure study of the performance of polyvinyl chloride (PVC) roofing membrane materials. Membranes from three manufacturers were installed at Chanute Air Force Base, IL, Dugway Proving Ground, UT, and Fort Polk, LA. A major difference in the roof constructions was that, at Chanute, the membranes were ballasted whereas, at Dugway and Fort Polk, they were mechanically ... |
|
| REMR Management Systems - Navigation and Reservoir Structures, Condition Rating Procedures for Concrete in Gravity Dams, Retaining Walls, and Spillways |
SEP 95 |
79 pages |
| Authors:
Rupert E. Bullock; Stuart D. Foltz; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| The purpose of this report is to describe a proposed system for determining a condition index (Cl) that numerically rates the condition of the concrete in a gravity dam monolith, retaining wall, or spillway on a scale of 1 to 100 by evaluating each concrete distress objectively. The rating system described herein allows the CI to be determined by the use of a visual investigation with limited equipment. The rating ... |
|
| Conformal Temperature Sensors from Ion-Implanted Polymers |
28 APR 95 |
23 pages |
| Authors:
Mary G. Moss; James Kaufmann; Ryan E. Giedd; Yonggiang Wang; BREWER SCIENCE INC ROLLA MO
|
| Previous work demonstrated the feasibility of forming thin-film, negative temperature coefficient, temperature sensors from ion implanted polymer films Semiconductive films of ion implanted polymers have the advantage that they can be applied to a variety of substrates, including flexible plastic, and patterned by conventional lithographic processes. One major advantage is their high degree of solvent and abrasion resistance. During Phase II, polymer and processing conditions which resulted in stable films ... |
|
| Laser Filter Inserts for Goggles, Sun, Wind and Dust |
JUN 94 |
26 pages |
| Authors:
Harry A. Smith; Monis J. Manning; Edward M. Healy; POLAROID CORP CAMBRIDGE MA
|
| In order to provide eye protection for military personnel, two types of laser-protective filter elements were developed for use as inserts in the Goggles, Sun, Wind, and Dust. The elements were designed to be snapped into the goggle frame in back of the standard ballistic lens. A total of 600 Type A filter elements with optical density greater than 4.0 at 400-532 nm and photopic transmission of 44% were delivered ... |
|
| Abrasive Properties of Test and Training Site Soils: Relative Hardness of Fine Particle Fraction |
JUN 94 |
15 pages |
| Authors:
Austin W. Hogan; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
|
| The experiment reported here shows that fine soil particles contribute to abrasion, wear and ultimate failure of parachute materials in a manner somewhat analogous to 'three-body abrasion' in metals. The 'hardness' of the particles collected at several test, training and maneuver areas is examined and scaled to known natural materials and commercial abrasives. The geometric diameters of the soil grains that enter and imbed in the fibers are a primary ... |
|
| Airfield Pavement Failure Evaluation, Yap International Airport, Yap Island, Federated States of Micronesia |
JUN 94 |
|
| Authors:
Steve L. Webster; Gary L. Anderton; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS GEOTECHNICAL LAB
|
| An airfield pavement investigation was performed in January 1994 at Yap International Airport, Yap Island, Federated States of Micronesia, to determine the causes of premature pavement failures. Field testing included a pavement condition survey, dynamic cone penetrometer (DCP) tests, in situ water content measurements, and a drainage investigation. Laboratory testing included gradation and asphalt content tests on the asphalt concrete, and sieve analysis, Los Angeles Abrasion, Atterburg limits, and soaked ... |
|
| Simulation of Manufacturing Processes |
MAY 94 |
31 pages |
| Authors:
C. A. Hall; T. A. Porsching; PITTSBURGH UNIV PA DEPT OF MATHEMATICS AND STATISTICS
|
| This report summarizes research surrounding the simulations of two manufacturing processes-the finishing and/or repair of material surfaces and the stamping of sheet metal parts. Regarding the surface finishing project, a unified mathematical theory for the process of material removal by abrasion (grinding and polishing) was developed. Then strategies were formulated for, material removal by Operator controlled (OC) or Computer Numerically Controlled (CNC) machines. For, the sheet metal stamping project, certain ... |
|
| Construction Productivity Advancement Research (CPAR) Program. Performance of Concretes Proportioned with Pyrament Blended Cement |
APR 94 |
106 pages |
| Authors:
Tony B. Husbands; Philip G. Malone; Lillian D. Wakeley; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS STRUCTURES LAB
|
| Pyrament Blended Cement (PBC) is known in the construction industry for its ability to gain strength rapidly and achieve very high early strength. The Waterways Experiment Station (WES) conducted a laboratory evaluation of concretes made with PBC to determine if these concretes perform better than concretes made with ordinary portland cement (OPC) in tests of various aspects of concrete durability. For this study, six concretes based on PBC-XT were proportioned ... |
|
| Epoxy-Functional Fluoropolyol Polyacrylate Coating of Optical Fibers. |
29 MAR 1994 |
|
| Authors:
Liliana Klinger; James R. Griffith; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An infinite network polymer containing fluorine as a coating or cladding material for optical fibers. Fluoropolymers, such as silicone amine C0-C16 fluoroepoxy resin and cis-trans fluoropolyol polyacrylate, reduce water permeability because of the bonding between the fluoropolymer and the substrate. The fluoropolymers exhibit substantially increased moisture resistance when compared to conventional fiber coating materials. Variations in chemical structure effect physical properties of the polymer and different compounds can be chosen ... |
|
| Repair, Evaluation, Maintenance, and Rehabilitation Research Program Overlays on Horizontal Concrete Surfaces: Case Histories |
FEB 94 |
104 pages |
| Authors:
Roy L. Campbell Sr; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS STRUCTURES LAB
|
| This study documents the current practices for overlaying horizontal concrete surfaces as a first phase in the development of performance criteria for concrete overlays. The case histories presented were typically for overlays completed within the last 10 years and located at Corps of Engineers civil works projects. Overlays documented included bonded conventional, low-slump, fly-ash, silica-fume, polymer-modified, and fiber-reinforced concretes. Unbonded overlays were also documented. Although the information obtained for each ... |
|
| Evaluation of Alternate F-14 Wing Lug Coating |
01 DEC 93 |
28 pages |
| Authors:
Janet L. McGovern; Alan E. Ankeny; NAVAL AIR WARFARE CENTER AIRCRAFT DIV WARMINSTER PA AIR VEHICLE AND CREW SYST EMS TECHNOLOGY DEPT
|
| The F-14 wing lug is coated with specific formulation polyurethane coating which prevents scoring of the wing lug by providing a wear surface for the outside diameter of the wing pivot bearing. The manufacture of this coating material was discontinued in 1991 because the original formulation used talcs which contained asbestos as impurities. The new formulation, containing asbestos free talcs, was inadequate in providing the abrasion resistance required to protect ... |
|
| A Preliminary Evaluation of the Phosphazene Resin PPZ |
OCT 93 |
24 pages |
| Authors:
Adam J. Jaglowski; Karin M. Gabriel; Marc S. Pepi; ARMY RESEARCH LAB WATERTOWN MA MATERIALS DIRECTORATE
|
| A phosphazene material, PPZTM, is reported by Idemitsu Petrochemical Company (Tokyo, Japan) to have excellent chemical and abrasion resistance properties for hardcoating applications. An evaluation of the chemical resistance of this coating is presented. PPZ coated on poly(ethylene terephthalate) (PET) films were challenged with simulants (2-chloroethyl ethyl sulfide (CEES), 2-chloroethyl methyl sulfide (CEMS), diisopropyl methyphosphonate (DIMP)) and a decontaminant (DS-2) via a droplet test method. Preliminary results showed that the ... |
|
| Abrasion Resistance Evaluation Method for High-Density Polyethylene Jackets Used on Small Diameter Submarine Cables |
JAN 1993 |
103 pages |
| Authors:
Kevin G. Booth; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
|
| A standard off-the-shelf Taber Abraser instrument is used to quantify the abrasive wear resistance of high-density polyethylene jackets on small diameter submarine cables. The procedures developed and used resulted in reliable and repeatable data and form the basis for an evaluation method of abrasive wear resistance. The wear rates of HDPE cable jacket and flat sheet specimens were compared. |
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| Effects of the Abrasiveness of Test and Training Site Soils on Parachute Life |
MAY 92 |
33 pages |
| Authors:
Austin W. Hogan; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
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| The failure of individual parachutes, as a function of service life and exposure, has long been of interest. Examination of a sampling of parachutes used by the U.S. Army and the U.S. Forest Service 'Smokejumpers' indicates that suspension lines begin to degrade during the first 30 users. Laboratory tests confirmed that suspension line degradation is the most common way that parachutes fail, and that this degradation is primarily a result ... |
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| F-14 Wing Lug Coating Investigation |
15 FEB 92 |
26 pages |
| Authors:
Donald J. Hirst; Charles R. Hegedus; RUTGERS - THE STATE UNIV NEWARK NJ DEPT OF PHYSICS
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| F-14 wing lugs have been painted with a special coating which prevents wear of the bearing and lug, and subsequent failure of the wing. The coating originally designated for this application contained talcs (extender pigments) which contain small concentrations of asbestos, causing discontinued manufacturing of the talcs and the coating. Since the performance of this coating is considered critical to flight, a replacement was needed to prevent grounding of the ... |
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| Repair, Evaluation, Maintenance, and Rehabilitation Research Program. Underwater Repair of Concrete Damaged by Abrasion-Erosion |
DEC 91 |
348 pages |
| Authors:
Kamal H. Khayat; CALIFORNIA UNIV BERKELEY DEPT OF CIVIL ENGINEERING
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| The grinding action of waterborne debris circulating in concrete stilling basins, open channels, navigation locks, and other hydraulic structures can lead to abrasion damage several feet in depth. Damaged areas need to be periodically repaired to ensure the functionality and safety of the hydraulic facility. Traditionally, these repairs have been carried out after dewatering the damaged area; however, such practice can interfere with the operations of the facility and can ... |
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| A Preliminary Evaluation of Diamond-Like Carbon Coated Polycarbonate |
SEP 91 |
17 pages |
| Authors:
Alex J. Hsieh; Peter G. Dehmer; Pearl W. Yip; ARMY LAB COMMAND WATERTOWN MA MATERIAL TECHNOLOGY LAB
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| The deposition of diamond like carbon (DLC) films on polycarbonate substrate has recently been achieved at room temperature by Diamonex, Inc. via a unique ion beam system. These diamond-like carbon coatings have considerable potential as wear-resistant protective hardcoatings for transparent armor systems. Aspects of ballistic behavior, abrasion resistance, thermal stability, and chemical resistance of the coating and any influence it has on the impact performance of the polycarbonate substrate were ... |
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Reports by Keyword(s)
ABRASION
