圧力容器の延性不安定破壊評価 : 荷重変位線図を用いた評価手法の提案

概要

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This paper presents a new scheme for the estimation of unstable ductile fracture using the J-integral. The proposed method uses a load-versus-displacement diagram which is generated using fully plastic solutions. By this method, the phenomena of the ductile fracture can be grasped visually. Thus, the parametrical survey can be executed far more easily than before. Then, using the proposed method, unstable ductile fracture is analyzed for single-edge cracked plates under both uniform tension and pure bending. In addition, several parametrical surveys are performed concerning (1) J-controlled crack growth, (2) compliance of the structure, (3) ductility of the material (i. e., J-resistance curve), and (4) scale of the structure (i. e., screening criterion). As a result, it is shown that the proposed method is especially effective for the parametlical study of unstable ductile fracture.
一般社団法人日本機械学会の論文
1990-01-25