J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 903-907
Effects of microstructural heterogeneity on the spallation behavior of materialsHaiying Wang1, Yong Liu1, 2, Mengfen Xia1, 3, Fujiu Ke1, 4 and Yilong Bai1
1 LNM, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, PR China
2 Graduate School of Chinese Academy of Sciences, Beijing 100039, PR China
3 Department of Physics, Peking University, Beijing 100871, PR China
4 Department of Applied Physics, Behang University, Beijing 100084, PR China
Published online: 26 July 2006
It is of utmost importance to understand the spallation behaviour of heterogeneous materials. In this paper, a driven nonlinear threshold model with stress fluctuation is presented to study the effects of microstructural heterogeneity on continuum damage evolution. The spallation behavior of heterogeneity material is analyzed with this model. The heterogeniety of mesoscopic units is characterized in terms of Weibull modulus m of strength distibution and stress fluctuation parameter k. At high stress, the maximum damage increases with m; while at low stress, the maximum damage decreases. In addition, for low stress, severe stress fluctuation causes higher damage; while for high stress, causes lower damage.
© EDP Sciences 2006