The Finite Element Analysis of Fatigue Crack Opening Behavior Using Two Dimensional Eight Node Isoparametric Element

2차원 8절점 등매개요소를 사용한 피로크랙개구거동의 유한요소해석

The fatigue crack opening behavior is analyzed using finite element method. Because extremely fine mesh subdivision is required when using constant stress constant strain triangular element, this study uses conventional two dimensional eight node isoparametric elements. Since plasitc zone size is similar to crack propagating length per each load cycle because of relatively large element size, a new analysis model that a crack propagates every two load cycle is suggested. the opening load and crack opening displacement can be obtained accurately by this method.