Spallation analysis with a closed trans-scale formulation of damage evolution

被引:8
作者
Wang Haiying
Bai Yilong
Xia Mengfen
Ke Fujiu
机构
[1] Chinese Academy of Sciences,LNM, Institute of Mechanics
[2] Peking University,Department of Physics
[3] Beijing University of Aeronautics and Astronautics,Department of Applied Physics
关键词
spallation; statistical microdamage mechanics; damage evolution; damage localization; closed trans-scale formulation;
D O I
10.1007/BF02489378
中图分类号
学科分类号
摘要
A closed, trans-scale formulation of damage evolution based on the statistical microdamage mechanics is summarized in this paper. The dynamic function of damage bridges the mesoscopic and macroscopic evolution of damage. The spallation in an aluminium plate is studied with this formulation. It is found that the damage evolution is governed by several dimensionless parameters, i.e., imposed Deborah numbersDe* andDe, Mach numberM and damage numberS. In particular, the most critical mode of the macroscopic damage evolution, i.e., the damage localization, is determined by Deborah numberDe*. Deborah numberDe* reflects the coupling and competition between the macroscopic loading and the microdamage growth. Therefore, our results reveal the multi-scale nature of spallation. In fact, the damage localization results from the nonlinearity of the microdamage growth. In addition, the dependence of the damage rate on imposed Deborah numbersDe* andDe, Mach numberM and damage numberS is discussed.
引用
收藏
页码:400 / 407
页数:7
相关论文
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