有限変形弾塑性問題でも適用可能なJ積分やJ積分範囲ΔJに関する研究

抄録

This paper summarizes the formulations and some of the applications of the three-dimensional J-integral and J-integral range ΔJ that were proposed by the authors. The proposed crack parameters are evaluated by the domain integral method. Their values are guaranteed to be unconditionally independent of size and shape of integral domain by their formulation. The numerical examples demonstrate that the proposed crack parameters can characterize the severity of the crack tip deformation field. Hence, they can characterize the crack propagation behavior.