経路不変積分を用いた強不連続解析の精度検証に関する研究

抄録

We first examine the mesh independence of the finite element analysis making use of a damage model with incompatible elements that include a displacement discontinuous surface inside. This method is based on a strong discontinuity analysis with an assumed enhanced strain method. We then examine the independence of the width ofa discontinuous band. Finally, we estimate the method by means of verifying the accuracy of the energy release rate calculated by the J-integral and the E-integral, which are path independent integrals. As a result, we find that, by using the E-integral method, the strong discontinuity analysis is appropriate and high accurate in view of the energy release rate. We also find that the well-known J-integral is not useful to show the accuracy of the strong discontinuity analysis.