| Ground Vehicle Power and Mobility Overview |
30 MAY 2007 |
28 pages |
| Authors:
Jennifer Hitchcock; TACOM RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
|
| ARIES Navigation System Accuracy and Track Following |
MAR 2002 |
97 pages |
| Authors:
Thanh V. Nguyen; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF MECHANICAL ENGINEERING
|
 | One of the greatest challenges associated with the Autonomous Underwater Vehicle (AUV) is reliability, accuracy, and the high precision navigation system for its submerged operations. Data collected for later analysis can be meaningful if and only if, the precise location of the vehicle is known at the time the information is recorded. A reliable AUV must be able to determine its global position in the absence of external transmitting devices. ... |
|
| Computer Model Predictions of the Local Effects of Large, Solid-Fuel Rocket Motors on Stratospheric Ozone |
10 SEP 94 |
23 pages |
| Authors:
P. F. Zittel; AEROSPACE CORP EL SEGUNDO CA
|
| The solid-fuel rocket motors of large space launch vehicles release gases and particles that may significantly affect stratospheric ozone densities along the vehicle's path. In this study, standard rocket nozzle and flowfield computer codes have been used to characterize the exhaust gases and particles through the afterburning region of the solid-fuel motors of the Titan IV launch vehicle. The models predict that a large fraction of the HCl gas exhausted ... |
|
| HEMTT Dynamic Sensitivity to Small Obstacles at Low Velocities. Volume 1, Field Tests |
01 APR 94 |
156 pages |
| Authors:
Randolph A. Jones; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
|
| U.S. Army Waterways Experiment Station conducted dynamic tests using the M977 Heavy Expanded Mobility Tactical Truck (HEMTT) in both the empty and loaded configuration crossing low profile linear obstacles in both vehicle tracks. The obstacle heights were: 0.25, 0.50, 0.75, 1.00, 1,50, 2.00, 2.50 and 3.00 inches. The tests were designed to simulate the process of weigh-in-motion (WIM). The data collected were also used in a separate study which validated ... |
|
| Natural Resources: Defense and Interior Can Better Manage Land Withdrawn for Military Use |
APR 94 |
59 pages |
| Authors:
GENERAL ACCOUNTING OFFICE WASHINGTON DC NATIONAL SECURITY AND INTERNATIONAL A FFAIRS DIV
|
| The law defines how DoD and the Department of the Interior agencies are to operate in managing the resources of lands controlled by the military. Military needs have priority over resource management. DoD is authorized to establish military uses on the lands without consulting with Interior, and Interior's resource management activities require DoD concurrence. The law requires Interior to develop a resource management plan after consultation with DoD. It also ... |
|
| Traction Boot for Tires |
08 APR 1992 |
17 pages |
| Authors:
Joseph G. Warner; DEPARTMENT OF THE ARMY WASHINGTON DC
|
| The invention is a flexible boot that wraps around a tire to vary the tractive effect of a tire. The boot is a band with a different tread pattern on either side, and the treads may have different tractive effects depending on which way the tread rotates relative to the ground. Either tread pattern can be configured to hold the boot on the tire if that pattern faces radially inwardly ... |
|
| Dynamic Terrin |
30 DEC 91 |
290 pages |
| Authors:
M. Moshell; UNIVERSITY OF CENTRAL FLORIDA ORLANDO INST FOR SIMULATION AND TRAINING
|
| This research deals with battlefield terrain modified after the program has begun. It demo's, for example, a tractor plowing ground, changing the terrain in real time. Also, a fluid flow study demo'd a tractor breaching a dammed fluid pond and shows the flow to the lowest elevation. berms, craters, ditches, flowing water, vehicle track marks, complex motion of rigid objects. |
|
| Lunar Surface Mobility Studies Past and Future |
NOV 89 |
|
| Authors:
Gerald W. Turnage; Don C. Banks; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS GEOTECHNICAL LAB
|
 | WES efforts contributed to selection of the metal-elastic wheels successfully used on the Lunar Roving Vehicle (LRV) and produced a quantitative description of the high-level mobility capabilities of a concept tracked running gear proposed for future US lunar surface applications (the Elastic Loop Mobility System, or ELMS). This paper reviews highlights of those Apollo-era studies--first, the determination and quantitative characterization of two terrestrial soils each successfully processed to provide a ... |
|
| Evaluation of an Aluminum Replaceable Pad Track for the M-1 Main Battle Tank |
SEP 1988 |
223 pages |
| Authors:
Daniel F. Carbaugh; Mark A. Holtz; ALUMINUM CO OF AMERICA CLEVELAND OH
|
| An aluminum replaceable pad track, capable of utilizing existing T- 156 track hardware, was analyzed using both empirical and finite element analyses. The track was to be interchangeable with the current T-156 track at a minimum weight penalty. Such a track was analyzed and its load carrying capability in tension and torsional loads were predicted by correlating track load with block stress and comparing that with the strength levels of ... |
|
| Durability Testing of Tank Track Rubber Compounds under Cyclic Loading |
15 OCT 87 |
57 pages |
| Authors:
Gregory B. McKenna; Kathleen M. Flynn; NATIONAL BUREAU OF STANDARDS GAITHERSBURG MD
|
| The mechanical durability of three tank track rubber compounds, designated as 15TP-14AX 15NAT-25A and 15TP-R were evaluated within the framework of cycle shifted failure envelop (CSFE) model for rupture of carbon black filled rubbers. It was found that, while the CSFE model is imperfect, it serves as a useful framework for evaluating the mechanical durability of the rubber compounds. The three rubber compounds could be ranked for durability in creep ... |
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| Tracked Vehicle Weight Distribution and Ground Pressure |
15 MAY 87 |
|
| Authors:
ARMY TEST AND EVALUATION COMMAND ABERDEEN PROVING GROUND MD
|
| This document describes procedures for determining weight distribution and ground pressure of tracked vehicles. Weight distribution influences the life of suspension components and affects vehicle mobility and transportability. Ground pressure also provides an indication of vehicle flotation which affects mobility when traversing soft terrain. Keywords: Traversing soft terrain; Vehicle platform scale method; Wheel platform scale method. |
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| Evaluation of Radiation Techniques for Improving the Mechanical Properties of Tank Pads |
OCT 86 |
|
| Authors:
Byron J. Lambert; Joseph Silverman; MARYLAND UNIV COLLEGE PARK LAB FOR RADIATION AND POLYMER SCIENCE
|
| This report describes the development work involved in processing T- 142 tank pads with elastomers cured by high energy electrons. Two hundred such pads have been delivered to Yuma Proving Grounds for field testing. Also presented are the studies which demonstrate that design and manufacture of pads by means of this technology involves commercially available electron beam generators under circumstances where there is no radioactivity in the product or in ... |
|
| Proceedings of the Asian-Pacific Conference of International Society for Terrain-Vehicle Systems (1st) Held in Beijing, Ching on 4-8 August 1986 |
AUG 86 |
|
| Authors:
INTERNATIONAL SOCIETY FOR TERRAIN-VEHICLE SYSTEMS
|
| Tire (Wheel)-Soil Interaction and Vehicle Dynamics; Track-Soil Interaction and Tracked Vehicle Dynamics; Tool-Soil Interaction and other Topics. |
|
| Organic Composite Applications for the M1/M1A1 |
JUL 86 |
84 pages |
| Authors:
Allen F. Pivitt; GENERAL DYNAMICS CORP WARREN MI LAND SYSTEMS DIV
|
| The potential use of organic composite materials for various components in the M1/M1A1 tank to save weight is examined. Components incorporating these materials may be designed to replace components currently fabricated from steel or aluminum. A total of 49 M1/M1A1 components have been examined. Weight reduction will result in longer suspension component life. In particular, track pad and torsion bar life will increase, and life cycle costs will be reduced ... |
|
| Acoustic Directivity Patterns for Army Weapons. Supplement 4. The Multiple Launch Rocket System |
FEB 86 |
|
| Authors:
Paul D. Schomer; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| Environmental noise emissions of the Multiple Launch Rocket System (MLRS) weapon were measured in order to develop acoustic directivity patterns. Ignition noise was analyzed using C-weighting and separated from rocket engine noise, which was analyzed using A-weighting. The vehicle track noise, being very similar to that of the Bradley Fighting Vehicle (BFV), reported in Supplement 3, was not measured. (Author) |
|
| The Recycling and Reclamation of Used Tank Track Pins |
AUG 1985 |
64 pages |
| Authors:
J. T. Snyder; J. F. Wallace; CASE WESTERN RESERVE UNIV CLEVELAND OHDEPT OF METALLURGY AND MATERIALS SCIENCE
|
| This investigation was directed at determining the feasibility of recycling used tank track pins. Tank track pins manufactured from SAE 865OH alloy steel bar were tested in bending fatigue thus establishing the fatigue life characteristics of production pins. These pins were quenched and tempered, induction hardened and shot peened during manufacturing. To determine recycleability, several pins were fatigued at various stress levels to approximately 80 percent of their expected life, ... |
|
| Improvement in the Fatigue Behavior of Tank Track Pins |
AUG 1985 |
95 pages |
| Authors:
J. F. Wallace; A. M. Said; CASE WESTERN RESERVE UNIV CLEVELAND OHDEPT OF METALLURGY AND MATERIALS SCIENCE
|
| This investigation is aimed at improving the fatigue behavior of tank track pins through the use of better processing methods and materials. Five different compositions of steels investigated: SAE 865OH, 4340, 4140, 8620 and 1045. These were subjected to the following treatments: induction hardening, stress shot peening, nitriding and carburizing. All steels except 1045, received final treatment of shot peening. Tension-tension bending fatigue tests were conducted on these pins to ... |
|
| Improved Performance Band Track Program: Test Report |
APR 85 |
132 pages |
| Authors:
S. W. Miller; S. Fox; AAI CORP BALTIMORE MD
|
| A seventeen inch lightweight improved performance band track was developed for use on the Automotive Test Rig (ATR), a 14 ton amphibious vehicle, under contract to the David Taylor Naval Ship R&D Center. The track was designed utilizing corrosion resistant materials to perform in a marine environment. Using data obtained from a laboratory test, a track was fabricated and installed on a M113 surrogate test vehicle. The performance testing has ... |
|
| Electrical Properties of Tank Pad Rubber: A Feasibility Study |
JAN 85 |
41 pages |
| Authors:
L. C. Burton; J. Patt; VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG
|
| The purpose of this work is to investigate the feasibility of electrical measurements for improving the life and reliability of tank track pad rubber. Immediate goals are to determine if electrical measurements can be used to distinguish various types of rubbers used in tank track pads, to obtain more fundamental information about the electrical properties of the rubber, and to make recommendations. The most important results were related to the ... |
|
| Lightweight MBT Track Pin Development |
JAN 1985 |
78 pages |
| Authors:
Albin M. Nowitzky; DWA COMPOSITE SPECIALTIES INC CHATSWORTH CA
|
| An 18 month program was conducted by DWA Composite Specialties, Inc., for the U.S. Army Tank-Automotive Command Research and Development Center, Warren, for Light Weight MBT (Main Battle Tank) Track Pin Development. The track pin is composed of a DWA1 20(registered) liner installed by interferences (shrink) fit into an outer steel casing. DWA1 20(registered) is a metal matrix composite incorporating aluminum powder and ceramic particulate reinforcement. The DWA1 20(registered) system ... |
|
| Fatigue Measurement for Remaining Life |
SEP 84 |
34 pages |
| Authors:
S. B. Catalano; ARMY TANK-AUTOMOTIVE CENTER WARREN MI
|
| The objective of this work was to follow track pin surface residual stress as a function of fatigue test cycles. Twenty pins were selected from a group of 250 new T-142 track pins for this test. They were selected on the basis of being representative of pins having median values of surface residual stress as received from the shot peening operation in manufacturing. Residual stress measurements were made in both ... |
|
| T-156 Track with Removable Pad |
SEP 1984 |
12 pages |
| Authors:
A. B. Kendall; STANDARD PRODUCTS CO PORT CLINTON OH
|
| The T-156 track being used on the M1 vehicle is made with the roadwheel path rubber and ground pad rubber molded on an integral unit around a binocular style metal insert. The life of this track shoe is severely limited by the rate of wear and chunking to the ground pad side of the track shoe. This contract is an effort to develop modifications to the shoe body and to ... |
|
| Rubber Compound Development for Improved Military Tank Track. Phase II |
AUG 1984 |
|
| Authors:
M. B. Hoying; GOODYEAR TIRE AND RUBBER CO ST MARYS OH
|
| Using compound 17CD737 which was developed under phase I of this contract, fifty T-142 track pads and one vehicle set of T-156 track shoe assemblies were fabricated and shipped to TACOM for their analysis. |
|
| Direct Analysis of Heavily Loaded Carbon Black Filled Styrene-Butadiene Rubber Used in Tank Track Pads by FT-IR |
JUN 1984 |
|
| Authors:
J. M. Sloan; J. P. Clements; ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA
|
| Infrared spectra have been obtained of a heavily loaded (50 per hundred) carbon black filled styrene-butadiene rubber using a Fourier transform infrared spectrometer (FT-IT). Attenuated total reflectance (ATR) spectroscopy sampling employing a germanium (Ge) internal reflectance element was found to yield quality infrared spectra where other techniques have failed. Subtle changes were observed between the spectra of the filled and unfilled styrene- butadiene rubber (SBR). These changes are attributed to ... |
|
| Rubber Compound Development for Improved Military Tank Track. Phase I |
DEC 1983 |
|
| Authors:
M. B. Hoying; GOODYEAR TIRE AND RUBBER CO ST MARYS OH
|
| Ten each T-156 blocks were prepared from six different experimental compounds for analysis by TACOM. The compounds were formulated without regard for the requirements of Mil-T-11891B. These six compounds were chosen after laboratory testing of over 110 experimental formulations. |
|
| Preparation of T-156 Track and T-142 Pads with Restraining Band |
24 OCT 83 |
18 pages |
| Authors:
Michael B. Hoying; GOODYEAR TIRE AND RUBBER CO ST MARYS OH
|
| The objective of this work was to produce T-142 pads and T-156 blocks containing a constraining band which would reduce stress within the rubber when the rubber is under load, thereby decreasing the amount of chunking. Laboratory analysis of T-156 blocks containing a restraining band showed that the band did provide improved sidewall stiffness. Production of the T-156 blocks and T-142 pads was very labor intensive and required extreme care ... |
|
| M60 Clean Air Winter Test |
APR 1983 |
23 pages |
| Authors:
Mark D. Osborne; MICHIGAN TECHNOLOGICAL UNIV HOUGHTON KEWEENAW RESEARCH CENTER
|
| Two air induction systems on the M6O series tank were evaluated in falling snow. One tank used the standard air cleaner blower motor system (ACBM) while the other tank incorporated the Vehicle Exhaust Dust Ejector System (VEDES). None of the air filter elements on either tank became clogged with snow during the test. The check valves froze shut on the VEDES tank, while the ACBM became frozen with slush. The ... |
|
| Ground Contact Area Measurement Device. |
29 OCT 1982 |
|
| Authors:
Wahner E. Brooks; DEPARTMENT OF THE ARMY WASHINGTON DC
|
| The area of contact between a moving load transfer device (such as a wheel or track) and the surface can be rapidly and accurately measured to determine its magnitude and shape for use in evaluating mobility potential or determining appropriate adjustments to the transfer device(s). An array of load sensors is disposed in an assembly placed in the path of the transfer device(s). The assembly maintains the sensors in relative ... |
|
| M1 Winter Tank Test (Traction Devices) |
OCT 1982 |
38 pages |
| Authors:
R. L. Smith; MICHIGAN TECHNOLOGICAL UNIV HOUGHTON KEWEENAW RESEARCH CENTER
|
| Performance tests were conducted on an Abrams M1 tank to determine the overall vehicle operating characteristics and the effectiveness of traction aids on iced and snowy surfaces. The tests involved a comparison of how the M1 tank handled with an unmodified T156 track, a T156 track with ice shoes, and a T156 track with tungsten carbide tipped studs. The vehicle was tested for stopping distance, slope climbing ability, and the ... |
|
| Hardening of Armored Vehicle Suspension Components |
18 JUN 1982 |
12 pages |
| Authors:
Hubert Comminge; ARMY MOBILITY EQUIPMENT RESEARCH AND DEVELOPMENT COMMAND FORT BELVOIR VA
|
| Vulnerability analysis has predicted severe losses of armored combat units in all mine environments. This prompted investigations for providing countermine hardened suspensions for armored vehicles. The following guidelines were developed for hardening tank track shoes and roadwheels thus providing enhanced survivability: (1) Suspension components should be hardened to demonstrate enhanced blast survival from the explosion of a unidirectional shallow-buried charge. (2) Hardened components should not exceed the weight of current ... |
|
| Fabrication of T142 Tank Track Pads for Evaluation of a Rubber-Kevlar Composite Compound |
JUN 1982 |
15 pages |
| Authors:
Clyde E. Lentz; STANDARD PRODUCTS CO PORT CLINTON OHIO
|
| A composite compound consisting of the 'Tri-Band' formulation and Kevlar fiber was developed for evaluation in T142 tank track pads. Bonding of the rubber to the fiber was achieved by addition of bonding agents to the compound. 175, T142 pads each of the 'Tri-Blend' formulation and the developed composite were molded for vehicle testing. The data given shows the physical properties of these compounds. |
|
| Terrain Microroughness and the Dynamic Response of Vehicles |
JUN 1981 |
|
| Authors:
Richard A. Weiss; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
|
| The design of vehicles with particular operating characteristics on rough terrain requires accurate descriptors of terrain roughness. At present a one parameter description of surface roughness is available that uses the standard deviation of a detrended elevation profile. In order to introduce the frequency content of the terrain into the roughness description, a three parameter model of the surface roughness power spectrum is developed whose parameters are determined from the ... |
|
| Formation and Failure of Elastomer Networks via Thermal, Mechancial and Surface Characterization. Part II |
MAY 1981 |
|
| Authors:
David W. Dwight; James E. McGrath; Ray M. Yang; VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG
|
| Systematic study of tank track pads tested on paved, cross-country, and gravel courses was done with respect to the change in thermal, surface and mechanical properties. Experimental measurements were conducted mostly on paved course pads of different service mileage and manufacturers. ESCA was utilized to monitor the oxidative degradation caused by road service. In most cases, oxygen to carbon ratio (O/C) was found to increase with increasing service mileage. Solvent ... |
|
| Analysis of Steerability of Tracked Vehicles: Theoretical Predictions versus Field Measurements. |
MAR 1981 |
48 pages |
| Authors:
George V. Baladi; Behzad Rohani; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS STRUCTURES LAB
|
| A mathematical model has been developed for predicting the steering performance of high-mobility/agility tracked vehicles in environments ranging from very soft soils to hard surfaces such as rigid pavements. The tractive forces between the terrain and the vehicle track are simulated by a rheological model that accounts for nonlinear shear-stress/shear-deformation behavior, the effect of deformation rate on shearing resistance, and the effect of pressure on shear resistance and plastic yielding. ... |
|
| Baseline Data. Volume 3. Mean Frequency for Types of Information-Seeking or Error Events Occurring under Each Type of Task Conditions |
19 SEP 1980 |
|
| Authors:
D. L. Schurman; A. J. Porsche; APPLIED SCIENCE ASSOCIATES INC VALENCIA PA
|
| Data on occurrence of information seeking and performance errors are presented for track and wheel vehicle mechanics classified by amount of prior task experience. Within this framework, information seeking behaviors are identified by type of information source used and type of information sought in relation to characteristics of the tasks performed. Error data is similarly displayed for type of performance error in relation to presence or absence of information seeking ... |
|
| Baseline Data. Volume 1. Likelihood of Occurrence (One or More Times) of Information-Seeking or Error Events Under Different Task Conditions |
19 SEP 1980 |
|
| Authors:
D. L. Schurman; A. J. Porsche; APPLIED SCIENCE ASSOCIATES INC VALENCIA PA
|
| Data on occurrence of information seeking and performance errors are presented for track and wheel vehicle mechanics classified by amount of prior task experience. Within this framework, information seeking behaviors are identified by type of information source used and type of information sought in relation to characteristics of the task performed. Error data is similarly displayed for type of performance error in relation to presence or absence of informtion seeking ... |
|
| A Terrain-Vehicle Model for Analysis of Steerability of Tracked Vehicles |
JUN 1980 |
15 pages |
| Authors:
George Y. Baladi; Behzad Rohani; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
|
| This paper discusses the design and development of high-mobility/ agility tracked combat vehicles. These vehicles are tested for increased battlefield survivability through the avoidance, by high-speed and violent maneuver, of hits by high-velocity projectiles and missiles. The interrelationship between the terrain factors (such as soil type, soil shear strength and compressibility, etc.) and the vehicle's characteristics (weight, track length and width, location of center of gravity, velocity, etc.) during steering ... |
|
| Formation and Failure of Elastomer Networks via Thermal, Mechanical and Surface Characterization |
DEC 1979 |
61 pages |
| Authors:
David W. Dwight; James E. McGrath; VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG
|
| This work focussed upon development of ESCA, SEM/EDAX, TGA, DSC and TMA methodologies for synthetic elastomer compounds typically used in tank track pad service by the U. S. Army. The initial goal was to develop a molecular model of the failure mechanisms that lead to costly pad replacement. Exploratory measurements were conducted on fully compounded, uncured rubber, and pre- and post-service track pads. Studied also were laboratory-prepared samples involving variable ... |
|
| Feasibility of Composite Material Applied to Tracked and Wheeled Vehicles. |
JUN 1979 |
|
| Authors:
Boris Levenetz; Rune N. Anderson; K. R. Berg; RIGGS ENGINEERING CORP SAN DIEGO CA
|
| The purpose of this contract is to determine the feasibility of applying fiber reinforced composite materials to tracked and wheeled Army vehicle components. Seven components are included in the study. Several design concepts are shown together with load and stress analysis. Material properties are given. The projected cost of a development program is presented for components for which composite materials were determined feasible. Also a quantity cost estimate is projected ... |
|
| Ongoing Case Studies Presented at the Army Symposium on Solid Mechanics, 1978 - Case Studies on Structural Integrity and Reliability, held at Bass River, Cape Cod, Massachusetts, 3 - 5 October 1978. |
SEP 1978 |
|
| Authors:
ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MASS
|
| This report discusses the ongoing Case Studies presented at the Army Symposium on Solid Mechanics, 1978-Case Studies on Structural Integrity and Reliability, held at Bass River (Cape Cod), Massachusetts, 3-5 October 1978. |
|
| Technology Assessment of Advanced Propulsion Systems for Some Classes of Combat Vehicles. Volume 1. Summary and Main Text |
SEP 1978 |
228 pages |
| Authors:
Frederick R. Riddell; Donald M. Dix; INSTITUTE FOR DEFENSE ANALYSES ALEXANDRIA VA SCIENCE AND TECHNOLOGY DIV
|
| This paper presents the results of a study of propulsion systems for surface combat vehicles which is intended to provide information useful to the Defense Advanced Research Projects Agency in identifying high-payoff R and D prospects. The primary purposes of the paper are to: (1) quantify the technological advances needed to make major improvements in appropriate military propulsion systems and indicate relative payoffs; and (2) provide criteria for evaluation of ... |
|
| Technology Assessment of Avanced propulsion Systems for Some Classes of Combat Vehicles. Volume 3. Appendices G-M. |
SEP 1978 |
265 pages |
| Authors:
Frederick R. Riddell; Donald M. Dix; INSTITUTE FOR DEFENSE ANALYSES ALEXANDRIA VA SCIENCE AND TECHNOLOGY DIV
|
| Partial Contents: Size and Specific Fuel Consumption Relationships for Stirling Engines; Mechanical and Fluid Mechanical Transmissions for Propulsion of Land combat Vehicles and High-Speed Ships; Assessment of the Technology of Electric Transmission Subsystems for Surface Vehicles; Thrusters for Ground Combat Vehicles; and Thrusters for High-Speed Oceangoing Ships. |
|
| Track-Soil Interaction Model for the Determination of Maximum Soil Thrust |
JUL 1978 |
68 pages |
| Authors:
Leslie L. Karafiath; GRUMMAN AEROSPACE CORP BETHPAGE NY RESEARCH DEPT
|
| An analytical track-soil interaction model has been developed for the determination of maximum soil thrust. The model assumes rigid track geometry characterized by the dimensions of the main ground contact area and the approach angle. The position of the track is defined by its trim angle and sinkage at the front. Limits of interface stresses are determined by assuming soil failure in either the longitudinal or transverse direction. Within these ... |
|
| A Study of Elastomeric Materials for Tank Track Pads |
JUN 1978 |
39 pages |
| Authors:
Costas G. Gogos; Rodney D. Andrews; STEVENS INST OF TECH HOBOKEN NJ DAVIDSON LAB
|
| One of the major problems in track pad performance and expected life is heat generation brought about by the periodic loading of the pads and their viscoelastic (partly dissipative) nature. This problem has been simulated numerically making use of a number of simplifying assumptions. The results are included in this final report. We are currently investigating experimentally each of the material variables for a given number of'model' elastomers and are ... |
|
| Development of Advanced Concepts for Noise Reduction in Tracked Vehicles |
AUG 1977 |
|
| Authors:
Thomas R. Norris; Ronald B. Hare; Anthony G. Galaitsis; Georges R. Garinther; FMC CORP SAN JOSE CA ORDNANCE ENGINEERING DIV
|
| This investigation develops an understanding of the noise sources, the acoustical and vibratory paths through which energy enters the hull structure, and the mechanism by which noise arrives at personnel locations. A theoretical and experimental analysis of primary noise source of the vehicle, i. e. the track and suspension system, consisted of three phases: (1) The design of a computer program to simulate the track and suspension; (2) The isolation ... |
|
| Computer-Aided Design and Manufacturing for Closed-Die Forging of Track Shoes and Links. |
JUL 1976 |
|
| Authors:
Carl F. Billhardt; Nuri Akgerman; Taylan Altan; BATTELLE COLUMBUS LABS OHIO
|
| In the program, a computerized method was developed (a) for designing blocker and finisher dies for forging track shoes and links, and (b) for manufacturing blocker dies via numerical control (NC) machining techniques. The computer-aided design and manufacturing (CAD/CAM) method, developed was incorporated in a system of computer programs called TRACKS. This system has been verified by using two military track-shoe forgings, the T-130 and the T-142. TRACKS has the ... |
|
| Establishment of Rapid X-ray Diffraction Inspection Techniques for Residual Stresses. |
JUN 1976 |
|
| Authors:
Salvatore B. Catalano; ARMY TANK-AUTOMOTIVE RESEARCH AND DEVELOPMENT COMMAND WARREN MICH
|
| An automatic stress analyzer has been used for rapid measurement of residual stresses in track pins and torsion tubes. With this equipment measurements can be made from ten to one-hundred times faster than with conventional equipment. The equipment is a recent development and few are in existence. A unique feature of the unit at TARADCOM is that it has been interfaced with a computer for purposes of drawing isostress plots. ... |
|
| Track Tension Control. |
06 JAN 1976 |
|
| Authors:
John F. Kopera; william e. lawson; James P. Carr; DEPARTMENT OF THE ARMY WASHINGTON D C
|
| The patent relates to a method whereby a known vehicle normally operating on independently suspended trailing arms and pneumatic tires can be converted to a tracked vehicle by wrapping endless tracks around the tire tread areas in multiples of two. An expansible wheel-connector device is provided for causing the trailing arms and wheels to deflect in unison, thereby maintaining track tension and tire-track interengagement, minimizing uneven final drive torque loadings, ... |
|
| Wear Resistant Rubber Tank Track Pads. |
OCT 1975 |
|
| Authors:
Edward W. Bergstrom; ROCK ISLAND ARSENAL IL GENERAL THOMAS J RODMAN LAB
|
| Certain chemical heat stabilizers provided a significant reduction in heat buildup to various experimental track pad vulcanizates while others provided a significant improvement in tear resistance at 250F. Although the resistance to heat buildup through the use of wire cloth may be improved in some cases the use of wire cloth in track pads is not feasible because of the chunking and delamination problems associated with its use under dynamic ... |
|
| Testing of a Demountable Tire Roadwheel Concept |
AUG 1975 |
26 pages |
| Authors:
John W. Cameron; ARMY TANK-AUTOMOTIVE COMMAND WARREN MI
|
| This program evaluates a demountable tire roadwheel. The purpose is to make it possible to replace roadwheels on tracked vehicles in the field as contrasted with present roadwheels having bonded and molded in place solid rubber tires which require stocking complete roadwheels and returning roadwheels to the factory to have new tires molded on. If successful, the logistic burden would be reduced. |
|
Reports by Keyword(s)
VEHICLE TRACKS
