溶接材の二次元き裂進展シミュレーション

概要

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Crack growth analyses of inhomogeneous CT (Compact Type) specimens are carried out by means of the two-dimensional finite-element method. The CT specimen is made of a welded plate of A533B-and HT80-type steel. The fusion line exists perpendicular to the crack direction. By changing the ratio of the widths of the two metals, the three specimens are analyzed. Based on the experimental results, generation phase analyses are conducted. The J-integral is evaluated using several conventional equations, and their availabilities for inhomogeneous material are discussed. The results show that the effect of the fusion line is strong when it is located in front of the crack tip. The crack tip fields are compared with HRR (Hutchinson-Rice-Rosengren) solutions and their deviations from the HRR solutions are measured by the Q-factor. The change of the stable crack growth condition is discussed using Q-factor.
一般社団法人日本機械学会の論文
1994-01-25