浅裂纹三点弯曲试件弹塑性断裂参数J和δ的研究

Research in Elastic Plastic Fracture J and δ for Three Point Bent Specimen with Shallow Crack

研究了浅裂纹三点弯曲试件断裂参数Ｊ和δ的关系，并提出了浅裂纹δ值减小因子ｍ的计算式。此外，根据实验与三维有限元计算的结果，对浅裂纹的Ｊ、δ值及ｍ值进行了分析。

The present paper deals with relationship of elastic fracture J and δ for the three point bent specimen, and deduces an equation used to calculate reduction factor m of δ value for shallow crack. According to experiment results and 3 D FEM computation, the values of J, δ and m for shallow crack are analyzed. An new method for strength design and damage analysis of shallow crack is proposed.