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Title: Evolution of microcracks in brittle solids under intense dynamic loading
Authors: Wang, Z.-P. 
Lam, K.Y. 
Issue Date: 1995
Citation: Wang, Z.-P., Lam, K.Y. (1995). Evolution of microcracks in brittle solids under intense dynamic loading. Journal of Applied Physics 77 (7) : 3479-3483. ScholarBank@NUS Repository.
Abstract: An evolution equation of microcracks for brittle cracked materials subjected to an applied dynamic tensile pressure is presented. The influence of inertial effects (or kinetics) on the dynamic growth of microcracks, which is a major characteristic of intense dynamic loading, is taken into account. Numerical analysis of the evolution equation clearly indicates that microcrack growth at high strain rate (ε̇≥103 s-1) is unstable. The critical condition for microcrack dynamic growth is obtained. It is predicted that the threshold stress for dynamic growth of microcracks is dependent on the average strain rate at super-high strain rate (ε̇≥106 s-1); however, numerical result is also shown that when the average strain rate ≤105 s-1, the threshold stress can be, approximately, taken to be a constant. © 1995 American Institute of Physics.
Source Title: Journal of Applied Physics
ISSN: 00218979
DOI: 10.1063/1.359564
Appears in Collections:Staff Publications

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