第３部門③

[13007-12-03] Elasto-plastic Fatigue Crack Propagation Analysis Considering Crack Surface Corrosion Effect (Proceedings of Symposium on Applied Mechanics)

*HOMARE SHIBATA¹, KEISUKE SATOH², RICCARDO FINCATO³, SEIICHIRO TSUTSUMI³ (1. Sumitomo Heavy Industries, Ltd.・Osaka University, 2. Sumitomo Heavy Industries, Ltd., 3. Osaka University)

Keywords:Fatigue Crack Propagation, Corrosion, Elasto-pastic Analysis, Crack Closure

Recently, multiple fatigue life extension techniques have been proposed utilizing crack closure, while no detailed numerical analyses have been conducted for them. On the other hand, the authors have been inventing an unconventional elasto-plasticity model called the Fatigue SS Model and proposed the assessment method on crack propagation life based on it. This study aims to follow numerically fatigue crack propagation experiments considering corrosion effect. The result shows good agreement with the crack propagation behavior even before and after corrosion procedure.