摘要
对于含有微损伤的多孔介质,由于微裂纹和微孔洞的存在,从宏观角度看,非弹性体应变会随着外载荷的变化而发生改变,即非弹性体应变不应为零。本文修正了计及损伤效应的Bodner-Partom本构模型。并以修正的本构模型对LY-12硬铝材料受到电子束辐照时产生的热击波及材料的创伤破坏效应进行了理论计算,将计算值同实验结果比较表明,两者基本上是一致的。
Because of the presense of microcracks and microvoids, the inelastic volume-strain should be changed as the consequence of the change of the external loading, i. e. , the inelastic volume-strain should not vanish. In this paper, the Bodner-Partom constitutive equation for elas-tic-viscoplastic matreials is modified. The modified Bodner-Partom constitutive equation is used when the thermal shock wave and damage effect of LY-12 aluminum attoy exposed to an electron beam are theoretically calculated. The calculated results are consistent with experimental results.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
1993年第3期225-232,共8页
Explosion and Shock Waves
基金
国家863高技术激光技术领域的资助
关键词
材料
损伤
B-P本构模型
本构模型
the modified Bodner-Partom constitutive model, electron beam, damage effect
