領域積分法に基づく新しい三次元J積分とΔJ積分の定式化と数値解析例

抄録

In this paper, new 3D J-integral andΔJ-integral for large strain elastic-plastic problems based on the domain integral method are presented. Their rigorous derivations are presented first. Then a numerical example for the new 3D J-integral is shown. The results show that the new 3D J-integral does not depend on the size of the integral domain. Therefore, the proposed J-integral and ΔJ may become effective engineering tools for nonlinear fracture mechanics.