複雑な混合モード下の破壊力学パラメータ評価に関する研究

抄録

Many fracture accidents of industrial structures are caused from fatigue crack in material. By complex shape of structure and other reasons, fatigue crack grows in the material under mixed mode cyclic loading. Therefore, exact evaluation of stress intensity factors are required to predict fatigue life of the structure including small crack. In order to evaluate stress intensity factors under mixed mode loading, the interaction integral method (IIM) is applied in 3D finite element analyses. In this study, referential solution for IIM is calculated from the component separation method for flat stationary crack problems. Solutions for stress intensity factors derived from IIM shows excellent results.