| Wear Resistant Rubber Tank Track Pads. |
OCT 1975 |
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| Authors:
Edward W. Bergstrom; ROCK ISLAND ARSENAL IL GENERAL THOMAS J RODMAN LAB
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 | 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 ... |
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| Ten-Year Aging of Elastomeric Vulcanizates in Panama, Alaska, and Illinois. |
JUL 1974 |
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| Authors:
Edward W. Bergstrom; ROCK ISLAND ARSENAL IL GENERAL THOMAS J RODMAN LAB
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| Vulcanizates prepared from commercially available elastomers, many of which have been introduced since 1955, were exposed outdoors in Alaska; Rock Island, Illinois; and in the Panama Canal Zone to compare the effects of exposure in arctic, temperate, and tropic environments. Aging data collected on pads exposed as long as ten years are presented. The effects of rain forest vs. open sun exposure in Panama are compared as well as the ... |
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| Material Development for Improved Rubber Track Pads. |
APR 1974 |
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| Authors:
Edward W. Bergstrom; ROCK ISLAND ARSENAL IL GENERAL THOMAS J RODMAN LAB
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| Various reinforcement agents other than or in addition to carbon black were evaluated in efforts to improve the wear resistance of rubber compounds for potential use as track pads. These included Hi-Sil precipitated silica, lignin-rubber latex coprecipitates, 3/4-inch fiber wire, and brass-plated and low-carbon electrogalvanized wire cloth. The addition of wire cloth significantly improved the resistance to heat buildup of vulcanizates. Service test results after 384 miles on a cross-country ... |
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| Development of Wear-Resistant Elastomers for Track Pads. |
OCT 1972 |
33 pages |
| Authors:
Edward W. Bergstrom; ARMY WEAPONS COMMAND ROCK ISLAND IL GENERAL THOMAS J RODMAN LAB
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 | Correlation between service test wear ratings and laboratory test data obtained at room temperature for tear strength, resistance to crack growth, and abrasion resistance, as previously reported by the Research Directorate of this Command, has been confirmed in the most recent service test conducted at ATAC and Yuma. Of even more importance was the finding that the results of tear tests and crack growth tests conducted at 250 F correlated ... |
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| Rubber Pads for Tank Track |
JUL 1971 |
43 pages |
| Authors:
Edward W. Bergstrom; John R. Cerny; ARMY WEAPONS COMMAND ROCK ISLAND IL RESEARCH DEVELOPMENT AND ENGINEERING DIRECTORATE
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| Investigations of rubber compounding, service test evaluation, and rubber-to-metal bonding were made. The injection-molding of track pads was attempted. Numerous compounds were developed for optimum properties, and track pads prepared from these compounds were service tested to determine actual wear resistance. Long-term aging tests on millable polyester urethane track pads and rubber-to-metal bonded specimens were completed. Compounds based on Stereon 750, HYTRANS elastomers, SBR/polybutadiene blends, and EPDM provided pads with ... |
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| Prediction of Wear Resistance of Rubber Track-Pads by Standard Laboratory Tests. |
JUL 1971 |
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| Authors:
Edward W. Bergstrom; ARMY WEAPONS COMMAND ROCK ISLAND IL RESEARCH DEVELOPMENT AND ENGINEERING DIRE CTORATE
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| Various laboratory tests were investigated to determine if such tests could be used in predicting the wear resistance of rubber track pads. The main causes of track pad failure in service tests performed over the past 17 years were found to be chunking, cutting and abrasion. These service-induced failures were believed to be caused by poor tear strength (especially at elevated temperatures), poor resistance to crack growth, and poor abrasion ... |
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| Development of Rubber Pads for Tracked Vehicles |
FEB 1970 |
52 pages |
| Authors:
Edward W. Bergstrom; John R. Cerny; ARMY WEAPONS COMMAND ROCK ISLAND IL RESEARCH DEVELOPMENT AND ENGINEERING DIRECTORATE
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| Improvement in the wear resistance of rubber track pads was sought through compounding studies and evaluation of rubber-to-metal bonding agents. Correlation was sought between laboratory tests on the rubber component of track pads and service tests on the entire pad. Track pads fabricated from millable polyester urethanes provided improved service over that of commerical control pads. Small amounts of calcium oxide in millable polyester urethane vulcanizated eliminates the internal porosity ... |
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| Five Year Aging of Elastomeric Vulcanizates in Panama, Alaska and Illinois. |
DEC 1968 |
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| Authors:
Edward W. Bergstrom; ARMY WEAPONS COMMAND ROCK ISLAND IL SCIENCE AND TECHNOLOGY LAB
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| Vulcanizates prepared from commercially available elastomers were exposed outdoors in Alaska; Rock Island, Illinois; and the Panama Canal Zone to compare the effects of exposure to arctic, temperate, and tropic environments. Aging data collected on pads exposed as long as five years are presented as part of a planned ten year program. Results show that aging is generally more severe in Panama than in Alaska or Rock Island, although some ... |
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