Accession Number : AD0643282

Title :   COMPLETE DYNAMIC RESPONSE OF RATE-SENSITIVE STRUCTURES,

Corporate Author : CATHOLIC UNIV OF AMERICA WASHINGTON D C

Personal Author(s) : Perrone,Nicholas ; El-Kasrawy,Tamim

Report Date : OCT 1966

Pagination or Media Count : 27

Abstract : A mathematical model is presented of a pressure loaded rather than an impulsively loaded structural element. As the prototype of a general structure the dynamically loaded thin ring is considered. For a constant pressure pulse, exact and approximate responses are calculated and differ by only a few percent. In the approximate solution the yield stress is taken to be a constant associated with the peak strain rate (which occurs at the instant of load termination). The results suggest that one should be able to determine the complete response of a complex structure with arbitrary load pulse by enforcing an impulse/momentum change condition, while neglecting forces arising owing to deformation, to determine the initial strain rate distribution. The associated yield stress distribution may be calculated and assumed to be constant at each field point during the entire motion. This enormous simplification should bring a wide variety of practical physical problems within the scope of accurate solution via relatively modest effort. (Author)

Descriptors :   (*LOADS(FORCES), DYNAMICS), (*STRUCTURES, LOADS(FORCES)), STRESSES, STRAIN(MECHANICS), MATHEMATICAL MODELS, PRESSURE

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE