| Performance of Nomex Military Uniforms in Attacks by Flame Field Expedient Weapons - A Literature Study |
MAR 2007 |
23 pages |
| Authors:
Ramon D. Sellers; Jr. Carr Virgil J.; APPLIED RESEARCH ASSOCIATES INC TYNDALL AFB FL
|
 | The purpose of this final report is to highlight on the development and design of flame resistant uniforms such as Nomex brand uniforms and whether they provide greater protection from burns than Desert Camouflage Uniforms (DCUs). Assessments on the Nomex uniforms and DCUs have been made based on the research evaluations and tests conducted by government and industry. Various types of fabrics have also been evaluated to determine which provide ... |
|
| Instrumented Indentation of M855 Cartridge, Core, and Jacket Materials |
AUG 2005 |
28 pages |
| Authors:
Mark R. VanLandingham; Thomas F. Juliano; Matthew J. Hagon; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| Instrumented indentation was used to estimate the mechanical properties of as-processed materials used in 5.56-mm M855 projectiles. Three indentation tip geometries were used: a Berkovich tip, a 1- m-radius conical tip with a 90 cone angle, and a 25- m-radius conical tip also with a 90 cone angle. Because the Berkovich tip geometry is close to that of an ideal pyramid, the resulting measurements of elastic modulus and hardness for ... |
|
| Using Composites in Seismic Retrofit Applications |
20 APR 2005 |
201 pages |
| Authors:
V. M. Karbhari; AEROSPACE CORP EL SEGUNDO CA
|
| This report was prepared to provide a comprehensive review of the state-of-the-art for using composite materials for seismic retrofit applications. The emphasis is on seismic retrofit of reinforced concrete columns. The report is presented in eleven chapters. Chapters 1-3 provide a basic introduction to composite materials, including discussions on the types of matrix and reinforcement materials, processing methods, and basic mechanics. Polymer matrix composites with continuous carbon or glass fibers ... |
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| HVOF Application of Nickel and Nickel Alloy to Tungsten Heavy Alloy for Jacketed Penetrators |
NOV 2003 |
20 pages |
| Authors:
John V. Kelley; Russell Kilbane; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| In recent years, there has been an increased desire to replace depleted uranium (DU) anti-armor penetrators with tungsten heavy alloy (WHA) penetrators. However, the ballistic performance of WHA does not compare with that of DU. Many methods of improving the ballistic properties of tungsten have been explored. One recent method includes jacketing a long thin core of WHA with a more ductile metal. This report examines the use of thermal-sprayed, ... |
|
| Loose-Tube Neutral Tether Fiber Optic Termination Procedure |
JUN 2001 |
|
| Authors:
Martin F. Bowen; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
 | Neutral tethers for unmanned underwater vehicles may contain a bundle of single-mode, optical fibers that are protected inside flexible stainless steel tubing. To date the author knows of no commercially available systems or kits that substitute for the following procedure, which is a step-by-step method for terminating electro-optical, loose-tube tether assemblies when used in oil- compensated, underwater applications. This procedure alone will not result in a load-bearing assembly. It assumes ... |
|
| Reinforced Metal Structural Jackets for Advanced Gun Barrels |
26 APR 2001 |
14 pages |
| Authors:
James M. Burnett; Horst Gigerenzer; Eric Pennell; Craig Dampier; TRITON SYSTEMS INC CHELMSFORD MA
|
| High performance reinforced metals are being developed that have a series of desirable properties for gun barrel structural jacket applications. The two materials of interest are reinforced aluminum and reinforced titanium. Both of these materials possess very high strength, high fatigue resistance, high temperature resistance, and low density. Ongoing work to apply these promising materials to high performance gun barrels includes diffusion bonding to specified liners, material characterization, development of ... |
|
| Covering Achievements of the US Air Force Thrust Cell Technologies Program and Light Weight Thrust Chamber Assembly Program |
JUN 1999 |
|
| Authors:
Bruce Farner; Brian Wherley; Don Ulmer; Scott Claflin; Suzanne Ferrell; BOEING NORTH AMERICAN INC CANOGA PARK CA ROCKETDYNE DIV
|
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| Assembly and Method for Furcating Optical Fibers |
14 MAY 1999 |
16 pages |
| Authors:
xcGair D. Brown; Yancy T. Jeleniewski; Robert A. Throm; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An assembly that includes a fiber-containing structure that contains a plurality of optical fibers and a furcation tube assembly that includes a plurality of loose tube optical fiber cables. Each of the loose tube optical fiber cables includes a hollow inner tube; a support structure that includes strength members, the support structure surrounding the hollow inner tube; and, a protective jacket surrounding the support structure. The assembly further includes a ... |
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| SESAMS Leaves its Mark on Marines |
28 AUG 1998 |
3 pages |
| Authors:
Jason J. Bortz; MARINE CORPS SYSTEMS COMMAND QUANTICO VA
|
| The Special Effects Small Arms Marking System provides realistic and safe training for Marines by using special rounds filled with color paste that leave a visible mark where ever it hits. The rounds can currently be used with slightly modified M-16A2s or M9s. |
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| Amendment for Install Modular Manufacturing Works Teams at A DAM |
17 JUL 1998 |
|
| Authors:
GILBERT (CHARLES) ASSOCIATES INC MARIETTA GA
|
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| Final Technical Report for Modular Work Teams at Maryland Clothing |
17 JUL 1998 |
84 pages |
| Authors:
Robert L. Lowder; GILBERT (CHARLES) ASSOCIATES INC MARIETTA GA
|
| The PPFG T1-P1, Phase II, short tem project conducted by Charles Gilbert Associates, Inc. at The New Maryland Clothing Company continued the process of changing the manufacture of Army Dress Uniform Coats from conventional line concepts to Modular Manufacturing Work Teams. Phase II of the project installed teams at the start of the manufacturing process to Baste Under collar, which completed all operations through Final Inspection. Five teams were covered ... |
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| Roller Shaft Extractor |
17 MAR 1998 |
|
| Authors:
David N. Strong; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| All extractor for use in removing a solid. smooth. press fit shaft from a housing where access to the shaft is restricted The extractor has a jacket and a collet. The collet fits around the shaft and the collet in turn fits within the jacket. The exterior of the collet end within which the shaft is placed is tapered and this tapered portion of the collet fits within a similarly ... |
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| Flames and Liquid Fuel in an SI Engine Cylinder during Cold Start |
MAY 96 |
14 pages |
| Authors:
S. Campbell; E. Clasen; C. Chang; K. T. Rhee; RUTGERS - THE STATE UNIV PISCATAWAY NJ DEPT OF MECHANICAL AND AEROSPACE ENGIN EERING
|
| The flame propagations in the very first firing and subsequent cycles in an SI engine during cold start were studied to gain a better understanding of reaction fronts associated with liquid fuel (regular unleaded) in the cylinder. This work was performed using the Rutgers high-speed spectral infrared digital imaging system on a single-cylinder engine with optical access. The engine was mounted with a production engine head mated with a conventional ... |
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| Fiber Optic Loose Tube Buffer to Fan-Out Tube Adapter System. |
05 DEC 1995 |
|
| Authors:
Keith E. Sommer; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An adapter system protects optical fibers transitioning from a close-pack configuration within a rigid loose tube buffer to a fanned-out configuration using fan-out tube assemblies. Each fan-out tube assembly includes a hollow furcation tube surrounded firstly by a stranded strength member and secondly by an outer jacket surrounding the stranded strength member. The adapter system includes a first sleeve secured to an end of the loose tube buffer, a second ... |
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| Electro-Optical Coaxial Tow Cable. |
21 NOV 1995 |
|
| Authors:
Peter E. Seaman; Thomas R. Stottlemyer; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A marine tow cable has both coaxial electronic and fiber optic data transmission capabilities wherein the coaxial core conductors are positioned at thc neutral axis or center line of the cable with the coaxial shield conductor circumscribing a dielectric material there-between. Embedded within the dielectric material matrix, separating the core conductors and the shield conductor, are fiber optic transmitters helically circumscribing the core conductors. Surrounding the electro-optical assembly is a ... |
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| Design and Analysis of Composite Wraps for Concrete Columns |
JUN 95 |
35 pages |
| Authors:
Christopher P. Hoppwl; Travis A. Bogetti; John W. Gillespie Jr; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Composite jackets for concrete columns can potentially renew deteriorated structures and improve seismic resistance. Several experimental investigations have demonstrated that composite wraps increase load carrying capacity and ductility of concrete columns subjected to axial compression. This paper describes a theoretical model to predict the nonlinear stress-strain response of the wrapped columns as a function of geometry and the constitutive behavior of the concrete and column wrap. Model predictions are compared ... |
|
| Naval Research Laboratory Array Cable Qualifying Test Program |
01 AUG 94 |
21 pages |
| Authors:
Richard C. Swenson; T. A. Howell; NEPTUNE TECHNOLOGIES INC PICAYUNE MS
|
| In 1993, Neptune Technologies designed and fabricated two prototype array cables under NRL's support. Briefly, these two generic cables consisted of a monolay construction utilizing 18 singles and atwisted pair construction incorporating seven twisted pairs. Each conductor core was strengthened with an overbraid of Kevlar, then one core was jacketed with a braided sleeve of polyester which incorporated a fuzz type fairing, while the monocore incorporated an extruded jacket with ... |
|
| The Effects of Commercial Tempered Glass on Rifle Bullet Deflection |
AUG 94 |
102 pages |
| Authors:
Henri C. Lambert; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| Since the inception of special weapons and emergency response teams into modern law enforcement units, marksman teams have been employed to provide selective firepower during contingency operations such as barricaded suspects and hostage situations. During these operations, police marksmen are frequently confronted with storefront commercial tempered glass, a significant obstacle that may deflect bullets in an unpredictable manner. This study was conducted in order to explore and quantify the deflection, ... |
|
| Strum-Suppressant Cable for Towed Arrays. |
04 JAN 1994 |
|
| Authors:
Anthony A. Ruffa; Norman Toplosky; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A fairing for use with a tow cable and operable to suppress strumming vibrations induced in the cable as it is towed generally longitudinally of its length through water includes a plurality of tab members extending in continuous, end to end fashion over the longitudinal length of the cables' outer jacket. Each of the tab members extends radially outwardly from the outer jacket in angularly spaced relation to adjacent tab ... |
|
| Simple Procedure for Jugular Vein Cannulation of Rats |
1994 |
|
| Authors:
John F. Wyman; Timothy J. Moore; Michael S. Buring; NAVAL MEDICAL RESEARCH INST BETHESDA MD
|
| Jugular vein cannulation of rats is a method widely used in biochemical toxicology studies to allow intravenous administration of toxicants and/or temporal collection of blood samples. Methods typically used for this surgery produce tissue trauma, may partially interrupt the systemic circulation, and require a fair amount of practice by the technician in order to achieve proficiency. The method described here is simple to perform, produces minimal trauma to the rat ... |
|
| Structural Analysis and Fatigue Test of the Ranger Anti-Armor/Anti- Personnel Weapon System (RAAWS) |
DEC 93 |
38 pages |
| Authors:
Thomas E. O'Brien; James A. Neese; Christopher S. Rinaldi; Daniel J. Corrigan; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS
|
| The Ranger Anti-Armor/Anti-Personnel Weapon System (RAAWS) was investigated to determine its structural strength and fatigue life. The RAAWS is an 84-mm lightweight, shoulder-Fired recoilless weapon produced by FFV Ordnance, Sweden. The tube consists of a thin steel rifled liner overwrapped with a graphite/epoxy composite jacket. This investigation includes a finite element stress analysis, firing tests, laboratory strain and material property tests, and fatigue tests to determine the interim safe fatigue ... |
|
| Toxicity in the Rat of Smoke Produced by Combustion of Aircraft Audio Cable Insulation |
31 OCT 93 |
16 pages |
| Authors:
R. L. Carpenter; J. Rossi; T. K. Narayanan; M. S. Buring; J. A. Rivera; NAVAL MEDICAL RESEARCH INST BETHESDA MD
|
| The combustion toxicity of three audio cable jacketing materials (polyether polyurethane, thermoset rubber, and thermoset rubber with a flame retardant additive) was investigated by burining known amounts of the insulation materials in a modified FAA exposure system. Douglas Fir was used as a positive control and to provide calibration with other experiments. The FAA exposure system was modified to allow introduction of clean air at the termination of the smoke ... |
|
| Electro-Optical Coaxial Tow Cable. |
19 AUG 1993 |
|
| Authors:
Peter E. Seaman; Thomas Stottlemeyer; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An improved marine tow cable is disclosed having both coaxial electronic and fiber optic data transmission capabilities wherein the coaxial core conductors are positioned at the neutral axis or center line of the cable with the coaxial shield conductor circumscribing a dielectric material therebetween. Embedded within the dielectric material matrix, separating the core conductors and the shield conductor, are fiber optic transmitters helically circumscribing the core conductors. Surrounding the electro-optical ... |
|
| Sliding Breech Block System for Repetitive Electronic Ignition. |
10 AUG 1993 |
|
| Authors:
Jack S. Bernardes; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A sliding breech block system and method for repetitive fifing of electrothermal cartridges in an electrothermal gun are provided. The sliding breech block system comprises a high-power. low resistance, flexible coaxial cable which is routed through a sliding breech-block, a pulse-forming network, and two groups of bristles for conducting the pulses from the breech block to the electrothermal cartridge. The power cable comprises two layers of individually insulated, multi-strand wires ... |
|
| Dynamic Strains in an Orthotropically-Wrapped Gun Tube Part I. Theoretical |
JUL 93 |
|
| Authors:
Thomas E. Simkins; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS
|
| The axial symmetric equations of motion for a cylinder wrapped with an orthotropic jacket are used to compute the effect of jacket properties on the lowest axial symmetric critical velocity. It is shown that an orthotropic jacket. often used to strengthen a cylinder, may actually result in a critical velocity lower than that of the cylinder without the jacket unless the jacket stiffness to mass properties are sufficiently high. Vibrations, ... |
|
| Composite Reinforced Gun Barrels. |
25 MAY 1993 |
|
| Authors:
Amarnath P. Divecha; Subbash D. Karmarkar; Scott M. Hoover; William A. Ferrando; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A composite reinforced gun barrel with a composite of a titanium, nickel, or FeCrA1Y alloy matrix reinforced with round filaments or rectangular ribbons made of molybdenum or tungsten. The composite layer may be bonded directly onto the barrel or it may be bonded to a steel jacket which can then be heat shrunk onto an existing gun barrel. |
|
| OMNI-Directional Hydrophone. |
13 OCT 1992 |
|
| Authors:
Stanley A. Fisher; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An omni-directional hydrophone having a pair of fiber-optic windings wrapped around a resilient ball to form a spherical acoustic sensor is provided. The fiber-optic pair has a first fiber which has a bonded jacket and a second fiber which has an unbonded jacket. The fiber with the bonded jacket is sensitive to both vibration of the mounting structure and impinging acoustic signals. The fiber with the unbonded jacket is sensitive ... |
|
| Evaluation of Personal Cooling Systems in Conjunction with Explosive Ordnance Disposal Suits |
JUN 92 |
|
| Authors:
J. Frim; Andrew Morris; DEFENCE AND CIVIL INST OF ENVIRONMENTAL MEDICINE DOWNSVIEW (ONTARIO)
|
| This study examined the capabilities of three technologies (a liquid cooled undergarment, a thickly- ribbed vest of hydrophylic nylon, and an air vest) to alleviate thermal strain in personnel working in Explosives Ordnance Disposal (EOD) clothing under environmental conditions of 18 deg C and 40% relative humidity (rh), 340 C and 40% rh, and 34 deg C and 80% rh. Simulated EOD tasks consisted of treadmill walking (10 min), unstacking/carrying/stacking ... |
|
| Nonlinear Stress Analysis of Composite-Jacketed Steel Cylinders Subjected to High Internal Pressure |
MAR 92 |
|
| Authors:
Peter C. Chen; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS
|
| This report presents a nonlinear stress analysis of a thick-walled compound tube subjected to high internal pressure. The compound tube is constructed of a steel liner and a graphite-bismaleimide outer shell. Analytical expressions for the stresses, strains, and displacements are derived for all loading ranges up to failure. Numerical results for the stresses and the maximum value that the compound tube can contain without failure are presented. Compound Tube, Composite ... |
|
| X-Ray Diffraction Study of Residual Stresses in Metal Matrix Composite- Jacketed Steel Cylinders Subjected to Internal Pressure |
MAR 92 |
23 pages |
| Authors:
S. L. Lee; M. Doxbeck; G. Capsimalis; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS
|
| The study of aluminum/silicon carbide metal matrix composite (MMC)- jacketed steel structural components was made because of their light weight and high stiffness. Steel 'liner' cylinders were wrapped with MMC 'jackets' with an all-hoop layup and put through various degrees of hydraulic autofrettage and thermal soak. In this report, the results from our x-ray diffraction residual stress measurements on cylinders using a position-sensitive scintillation detection system are discussed. Our experimental ... |
|
| Weight Reduction of Isotropic Cylinders Using Equivalent Compound Cylinders |
FEB 92 |
17 pages |
| Authors:
Mark D. Witherell; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS
|
| A monoblock isotropic cylinder can be reduced in weight by replacing material from its outer diameter with a lightweight stiff composite material, such that the resulting compound cylinder has a bore radial displacement (per unit of internal pressure) equivalent to that of the original monoblock design. This report is a study of the weight savings that can be achieved by using different composite materials to replace isotropic materials in cylindrical ... |
|
| High Pressure Fiber Optic Connector Plug. |
12 NOV 1991 |
|
| Authors:
Roger L. Morency; Gerald E. Holmberg; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A fiber optic cable connection for high pressure environments utilizes a fiber optic cable having (1) a multiplicity of fiber optic strands, extending axially therein, (2) a strength member extending axially in spaced relationship thereabout, (3) an outer jacket, and (4) a filler matrix within the strength member and in which the strands are encased, a precision connector with an inner face having an axially extending from the transverse wall ... |
|
| Residual Stresses in a Prestressed Steel Pressure Vessel Wrapped with Multilayered Composites |
NOV 91 |
19 pages |
| Authors:
Peter C. Chen; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS
|
| This report presents an analytical solution for predicting residual stresses in a steel pressure vessel wrapped with a multilayered composite jacket. The numerical results for the hoop stresses before and after complete unloading are obtained for a subscale test tube. The steel liner is elastic- plastic, and the composite layup (02902)4 consists of 16 layers made of graphite bismaleimide produced by Fiberite Corporation. |
|
| Multi-Mission Ballistic Resistant Jacket. |
29 OCT 1991 |
|
| Authors:
Michael L. Lewis; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An improved ballistic resistant soft body armor jacket that is fit-adjustable, relatively lightweight, multi-mission adaptable, buoyant, fire-resistant, non hydroscopic and impervious to salt water and most petroleum-based fluids. The jacket shell consists of four basic ballistic resistant components: a back panel, left and right front panels in combination with side portions, and a permanent collar. It is of wrap around character and uniquely provides a minimum of one inch overlap ... |
|
| Armored Optical Fiber Cable Interconnection for Dual Payout Systems. |
08 OCT 1991 |
|
| Authors:
Fay A. Hoban; Harold S. Duff; Andrew W. Marten; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An armored optical fiber cable interconnection and method of making the interconnection with a self-sealing, low-strength joint with relatively low optical attenuation, has an inner fiber carrying jacket, an outer protective jacket, and an intermediate armored jacket of stranded material. The interconnection ends are assembled with a doubled layer of armored jacket over an intermediate protective jacket portion all sealed and held in place with a length of shrink tubing ... |
|
| Elastic-Plastic Analysis of a Steel Pressure Vessel Wrapped with Multilayered Composites |
OCT 91 |
26 pages |
| Authors:
Peter C. Chen; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS
|
| An elastic-plastic analysis of stresses and strains in an internally pressurized, composite-jacketed cylinder is studied here. Each layer is orthotropic but with different material properties. Analytical expressions are derived for a steel pressure vessel wrapped with multilayered composites. Numerical results are obtained for three types of composite jackets. The interface pressure, hoop strains, and stresses in the liner and jacket are presented. |
|
| Gyroklystron Device Having Multi-Slot Bunching Cavities. |
06 AUG 1991 |
|
| Authors:
Steven H. Gold; Arne W. Fliflet; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A gyrokystron device includes an electron beam source, a plurality of bunching cavities and an output cavity. A first bunching cavity has an input coupling aperture for receiving an rf signal from an rf signal injecting source. Each of the bunching cavities has a first pair of substantially uniform-angle slots of a preselected angle, which are diametrically opposed, and extend axially, parallel to the direction of the electron beam and ... |
|
| High Pressure Fiber Optic Connector Plug. |
07 DEC 1990 |
|
| Authors:
Gerald Holmberg; Roger Morency; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A fiber optic cable connection for high pressure environments utilizes a fiber optic cable having (1) a multiplicity of fiber optic strands extending axially therein, (2) a strength member extending axially in spaced relationship there about, (3) an outer jacket, and (4) a filler matrix within the strength member and in which the strands are encased, a precision connector with an inner face having an axially extending recess and with ... |
|
| Elastic-Plastic Analysis of a Thick-Walled Composite Tube Subjected to Internal Pressure |
OCT 89 |
|
| Authors:
Peter C. Chen; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS
|
| Organic composites have become familiar structural components in many applications that require high stiffness and low weight. A current problem in Army cannon design is to replace a portion of the steel wall thickness with an organic composite. The steel liner maintains the tube-projectile interface and shields the composite from the extremely hot gases. The steel also has elastic properties in the radial direction that are better than the composited ... |
|
| Efficiency of the Thermal Jacket on the Delivered Temperature of Prewarmed Crystalloid Intravenous Fluid |
89 |
|
| Authors:
Danny R. Bowen; VIRGINIA COMMONWEALTH UNIV RICHMOND
|
| A quasi-experimental research design was used to determine the relationship between the flow rate and the delivered temperature of prewarmed crystalloid intravenous solutions when using the Thermal Jacket, an insulation device designed for intravenous fluid bags, as compared to a conventional blood warning apparatus. One control and three experimental groups were used. Fluids in Group 1 (control group), Group 2, and Group 4 were prewarmed in a microwave oven to ... |
|
| An Investigation of Stresses and Strains in an Internally Pressurized, Composite-Jacketed, Steel Cylinder |
NOV 88 |
|
| Authors:
M. D. Witherell; M. A. Scavullo; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET WEAPONS LAB
|
| This report presents the results of a theoretical and experimental investigation of the effects on bore strain when a portion of the wall thickness of a steel cylinder is replaced with organic composite material. The pressure vessel is pressurized internally and the bore strain is theoretically predicted and experimentally measured as a function of wall ratio. Theoretical results for various ratios of steel to composite, from all-steel to all-composite, are ... |
|
| Semi-Foamed Polyethylene Molding Tape. |
26 JUL 1988 |
|
| Authors:
Raymond J. Phillips; Douglas O'Brien; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| The present invention relates to an insulated covering for electrical hardware and more particularly to a tape covering for bonding a cable jacket to the strength member of an electrical connector for use in a cable system that is buoyant in seawater. A semi-foamed polyethylene tape for use in the molding of foamed jacket polyethylene cables is disclosed. After tumble mixing low density foaming polyethylene, ethylene vinyl acetate co-polymer and ... |
|
| Method of Making Cable Assembly for Use in an Antenna Element Assembly. |
07 JUN 1988 |
|
| Authors:
Raymond J. Phillips; Douglas O'Brien; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A semi-foamed polyethylene tape for use in the modeling of foamed jacket polyethylene cables. After tumble mixing low density foaming polyethylene, ethylene vinyl acetate co-polymer and polyethylene color concentrate, the tape is extruded on a thermoplastic extruder having a maddox mixing screw that effectively mixes polyethylene compounds and a slot die with a suitable opening dimension. The tape is then quenched. By controlling manufacturing variables the tape is foamed to ... |
|
| Enhancing Productivity in Naval Aviation Training in a Market of Changing Demographics |
01 MAR 88 |
|
| Authors:
Jomills H. Braddock Ii; Robert L. Crain; Marylee C. Taylor; Shi-Chang Wu; JOHNS HOPKINS UNIV BALTIMORE MD CENTER FOR SOCIAL ORGANIZATION OF SCHOOLS
|
| This study analyzes CNATRA Automated Training Jackets, a new survey of NASC accessions, and extensive structured interview data to: 1) describe the complex flow of Student Naval Aviators (SNAs) through the various paths of the aviation training pipeline in terms of attrition/completion patterns and training times; 2) examine the extent to which technical major and AQT/FAR scores predict training success for Student Naval Flight Officers (SNFOs) and Student Naval Pilots ... |
|
| Method and Apparatus for Treatment of Hypothermia by Electromagnetic Energy. |
11 AUG 1987 |
|
| Authors:
Richard G. Olsen; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An apparatus and method for rewarming hypothermia victims utilizes mutually inductive first and second helical coils supported in spaced relation around a subject's torso, the combination of coils and subject having a resonant frequency in the 2 MHz to 20 MHz radio frequency range. An automatic tuner couples an RF generator to energize the coils at the resonant frequency. A portable verison utilizes flexible coils on an insulating and spacing ... |
|
| Characterizing Particle Combustion in a Rijke Burner |
29 MAY 87 |
|
| Authors:
J . C. Finlinson; R. W. Nelson; M. A. Nelson; M. W. Beckstead; BRIGHAM YOUNG UNIV PROVO UTAH DEPT OF CHEMICAL ENGINEERING
|
| The principle objective of this study is to identify and develop an understanding of the mechanisms whereby acoustic suppressants modify an acoustic wave. The experimental bases for the technical approach of this study is a Rijke burner which generates combustion oscillations. During the past year three major modifications were made to the Rijke burner to facilitate obtaining more reproducible data: (1) The cooling jacket was rebuilt to give better heat ... |
|
| Fairing Stops for Plastic-Jacketed Underwater Tow Cable |
JAN 87 |
|
| Authors:
Charles R. Rein; NAVAL OCEAN RESEARCH AND DEVELOPMENT ACTIVITY NSTL STATION MS
|
| The construction and installed details of mechanical stops for use with fairing segments on plastic jacketed underwater tow cables are explained. Installation is easy, consumes about one man-minute per stop, and requires no tools. The parts do not have to be threaded onto the tow cable from one end, they are very inexpensive, and are available off the shelf. Slight modification of the off-the-shelf parts is generally necessary. The technique ... |
|
| Optical Fibers with Reduced Pressure Sensitivity to High Frequency Acoustic Field. |
11 NOV 1986 |
|
| Authors:
Nicholas Lagakos; James H. Cole; Joseph A. Bucaro; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A pressure insensitive optical fiber waveguide comprising an optical fiber including an optical core and a concentric cladding; a substrate concentrically surrounding the optical fiber; and a fiber jacket substrate including at least two coatings concentrically surroundings the substrate wherein the innermost coating has a small Young's modulus and the outermost coating has a high Young's modulus. (Patent). |
|
| Polarization-Preserving Single Mode Fiber Coupler. |
16 SEP 1986 |
|
| Authors:
Moges Abebe; William K. Burns; Carl A. Villarruel; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| The present invention relates generally to fiber optical couplers, and more particularly to the fabrication of polarization-preserving fiber optical couplers. Optical-fiber-to-fiber couplers for coupling an optical beam from one or more fibers to another fiber or fibers are known in the art. A polarization-preserving single mode fiber coupler is fabricated by a method which does not require mutually aligning the fiber polarization axes provided the actual misalignment angle is is ... |
|
| Corrosion of Aluminum Jackets on Aboveground Heat Distribution Systems |
SEP 86 |
|
| Authors:
Kirk E. Cooper; Ellen G. Segan; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| Severe corrosion of aluminum sheet used as a protective jacket on aboveground heat distribution systems has occurred at several military installations. This study was conducted to determine the cause of this corrosion and to recommend revisions to guide specifications on the design, selection and construction on insulation systems on aboveground systems. Used and virgin materials were tested to determine the source of failure. It was concluded that the pitting corrosion ... |
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Reports by Keyword(s)
JACKETS
