FEM analysis of a crack in a bimaterial plate based on the crack tip stress method

摘要

The finite element method (FEM) is useful for the stress analysis and used widely in general. However, it is still not necessarily easy to obtain the highly accurate values of the stress intensity factors by FEM. Recently, a method for calculating the highly accurate values of stress intensity factors is proposed by H. Nisitani, based on the usefulness of the stress values at a crack tip calculated by FEM. This method is called the crack tip stress method. In this study, the crack tip stress method is applied to the problems of the bimaterial plate with a crack subjected to tension. Then the accuracy of the present analysis is discussed through the exact stress intensity factors obtained by the body force method (BFM).