Accession Number : AD0663820

Title :   THE EFFECTS OF SOLID STRENGTH ON THE PROPAGATION AND ATTENUATION OF SPHERICAL AND PLANE SHOCK WAVES,

Corporate Author : BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD

Personal Author(s) : Mok,Chi-Hung

Report Date : OCT 1967

Pagination or Media Count : 60

Abstract : To demonstrate the titled effects, basic equations in Lagrangian coordinates are derived for spherical and plane waves in an elastic-perfectly plastic solid. The solution is first discussed qualitatively on the basis of the method of characteristics and then is obtained numerically by using a finite difference method for a shock wave induced by a square stress pulse in time at a boundary. In agreement with Frasier's preliminary conclusions from the results of hypervelocity impact experiments in wax, the results show that the effects of solid strength are significant when the strength of the shock wave is within two orders of magnitude of the yield stress of the material. It is also indicated that precise control of the loading process is necessary to detect experimentally the possible effects of solid strength on the attenuation of shock waves. (Author)

Descriptors :   (*SHOCK WAVES, IMPACT SHOCK), (*SOLIDS, SHOCK RESISTANCE), PROPAGATION, ATTENUATION, ELASTIC PROPERTIES, PLASTIC PROPERTIES, DEFORMATION

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE