摘要
将孔洞看成一种弹性模量和泊松比都非常小的材料,在有限元计算中,通过输出该材料的体积来计算孔洞的体积。研究结果表明:采用该方法能很好地模拟孔洞的体积变化和材料的变形,避免了积分法的大量编程运算,又可以解决给定位移法中由于体积变化恒定,不能考虑晶体取向对孔洞长大影响的难题,而且在计算中能直接求解出单胞的有效力学性能,因而,该方法能较好地用于计算与分析含孔洞材料的孔洞体积和有效力学性能。
The void is treated as a material with very small Young＇s modulus and Poisson＇s ratio, and the volume of void can be obtained by outputting the material＇s volume in calculation. The results show that this method can be used to predict the change of void volume and shape during deformation. It can avoid compiling programs and be used to calculate the volume of void in the simulation of the effect of crystallographic orientation on void growth by using crystal plasticity finite element method compared with integral method and prescribed displacement method, and it can be used to predict the effective mechanical properties, so it is very useful to calculate and analyze the volume of voids and the effective mechanical properties of materials with voids.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第5期815-819,共5页
Journal of Central South University:Science and Technology
基金
国家重点基础研究发展规划项目(2005CB623706)
国际科技合作重点项目(2004DFA00200)
关键词
晶体塑性
有限元法
孔洞
力学性能
晶体取向
crystal plasticity
finite element method
void
mechanical properties
crystallographic orientation
