Study of the Dynamic Response of Belleville Washers and Ring Springs.
FOSTER-MILLER ASSOCIATES INC WALTHAM MASS
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Analyses and experiments were conducted on the propagation of surge waves in Belleville washers and ring springs under impact with a moving mass and sudden release from a precompressed state. This study was performed by the Foster-Miller Associates, Incorporated, of Waltham, Massachusetts, under the direction of the Research Directorate, Weapons Laboratory at Rock Island. Springs were analyzed with the use of a multiple-element model with mass and damping, as well as a simplified single element model in which the spring is considered as an equivalent bar. The analysis of the multiple-element model dealt with nonlinearities in the load-deflection curve, and Coulomb friction between the spring elements. Time-displacement records of surge-wave propagation were obtained on three types of Belleville washer assemblies and on two designs of ring springs under conditions of dynamic impact and sudden release. The surge-wave propagation velocity in Belleville springs is in the range of 100 to 120 feet per second for impact loading, and in the range of 95 to 100 feet per second for sudden release. Similar results for ring springs are 600 to 700 feet per second for impact and 350 to 425 feet per second for impact and 350 to 425 feet per second for sudden release. Author
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