Accession Number : AD0761082

Title :   Coalescence of Cavities During Dynamic Fracture,

Corporate Author : BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD

Personal Author(s) : DE Rosset,William S.

Report Date : JAN 1973

Pagination or Media Count : 54

Abstract : Two different modeling schemes have been used to predict the effect of coalescence on the observed growth laws of cavities during dynamic fracture. The first approach describes the coalescence problem 13 as a set of coupled equations. A simple physical model is proposed for which these equations can be solved analytically. Experimental data on void growth in aluminum during dynamic fracture are seen to fit the growth law predicted by the model. The second approach uses a computer simulation of cavity coalescence. Using true nucleation and growth laws which are linear in time, this particular simulation predicts that the observed growth rate will be exponential in time. (Author)

Descriptors :   (*FRACTURE(MECHANICS), MATHEMATICAL MODELS), CRACK PROPAGATION, LOADS(FORCES), IMPACT TESTS, ALUMINUM, COMPUTER PROGRAMS

Subject Categories : Metallurgy and Metallography
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE