The evaluation of stress intensity factors in plate bending problems using the dual boundary element method

摘要

This paper discusses the application of the boundary element method for the determination of stress intensity factors in plate bending problems. A number of case studies having a range of plan forms, with different combinations of boundary conditions, creak configurations and loading conditions are presented to illustrate the effectiveness of the boundary element method for the fracture analysis of plates. Results of K_I, K_II and K_III stress intensity factors for linear elastic fracture mechanics are presented for the case studies considered. The J-integral method, the displacement extrapolation Methodist he quarter point approach and the stress extrapolation method have been used to determine the stress intensity factors. The boundary element results for the case studies considered in the paper have been compared with either analytical or finite element results and in all cases good agreement has been achieved.