Application of fast multipole Galerkin boundary integral equation method to elastostatic crack problems in 3D

Fast multipole method (FMM) has been developed as a technique to reduce the computational cost and memory requirements in solving large-scale problems. This paper discusses an application of FMM to threedimensional boundary integral equation method for elastostatic crack problems. The boundary integral equation for many crack problems is discretized with FMM and Galerkinʹs method. The resulting algebraic equation is solved with generalized minimum residual method (GMRES). The numerical results show that FMM is more e cient than conventional methods when the number of unknowns is more than about 1200 and, therefore, can be useful in large-scale analyses of fracture mechanics