Abstract
It is important to evaluate the stress intensity factors of surface cracks in fracture mechanics. Numerical evaluations have been done by the three dimensional finite element method witch, however, needs a lot of labor to prepare the data. The boundary element method has the advantage on this point. But, its computational time is long because of the dense coefficient matrix. Therefore, the authors have developed the three dimensional boundary element code BEM 3 D for the super-computer and have shown that BEM 3 D can carry out the elastic analyses of surface cracks in a short computational time.
