三次元表面き裂の延性不安定破壊に関する研究 : 第1報 : COA一定条件によるき裂進展解析

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In this paper, the stable crack growth of three dimensional surface crack has been analyzed by the Line Spring Method. The elastic-plastic stiffness of a line spring element is evaluated by the complementary energy of the single edge notched specimen. The COA criterion is used for the crack growth analysis and the change of the surface crack configuration is analyzed with increasing applied stress. The penetration loads are estimated for the various surface crack configurations and are compared with those the net section stress criterion. The qualitative agreement is obtained between two results. But, for some configurations, the tearing instability arises before the crack penetration and the net section stress criterion becomes invalid for those configurations.ラインスプリング法により弾塑性状態における表面き裂材のき裂進展解析をCOA一定条件を用いて行い，き裂貫通の実断面応力基準と比較検討した．
社団法人日本機械学会の論文
1985-01-25