层裂损伤发展过程的数值分析  

Numerical Analysis on the Damage Evolution in Spallation of Ductile Materials

作　　者：张凤国[1] 秦承森[1] 周洪强[1] 

机构地区：[1]北京应用物理与计算数学研究所,北京100088

出　　处：《兵工学报》2007年第10期1223-1228,共6页Acta Armamentarii

基　　金：国家自然科学基金资助项目(10476027)

摘　　要：用数值方法定性地分析了延性材料损伤过程中孔洞数密度分布的变化情况,及其与材料中应力变化过程之间的关系,以及孔洞数目在空间上的分布情况。同时还分析了初始成核孔洞大小以及计算参数对自由面速度曲线、损伤发展和孔洞数在空间上分布的影响。分析了不同时刻孔洞成核与增长对损伤度的影响。The variation of void number density distribution, the relation between the variation and the stress history in damage evolution of spallation of ductile materials and the space distribution of void number were analyzed numerically and qualitatively. The influences of the nucleated void sizes and some modeling parameters on the free surface velocity, the space distribution of void number, as well as the damage evolution in spallation were also investigated and discussed. In addition, the effect of the void nucleation and its growth at different times on the damage were also investigated and analyzed.

关 键 词：固体力学 层裂损伤 孔洞数密度分布 孔洞的成核与增长 自由面速度 延性材料 

分 类 号：O346.1[理学—固体力学]