F-1704 長さの違いを考慮した複数き裂の進展評価手法(S59-2 規格基準の高度化に関連する研究・開発状況(2))(S59 規格基準の高度化に関連する研究・開発状況)

概要

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When stress corrosion cracking or corrosion fatigue occurs, multiple cracks are frequently initiated in the same area. The JSME Post-Construction Code prescribes a conditions for crack coalescence in the crack growth process. However, in this code, the condition is represented with their relative location. The threshold for their relative size is not provided. This study aims to examine the effect of relative crack size on the multiple crack interaction. In this study, a simulation model was applied, to simulate the crack growth process, taking into account the interference between two cracks. This model made it possible to analyze multiple crack growth behaviors for many cases (e.g. different relative position and length) that could not be studied by experiment. Based on these analyses, a crack growth evaluation method considering the difference of crack size was suggested.
一般社団法人日本機械学会の論文
2001-08-22