抄録
In linear fracture mechanics, stress intensity factors which control the fracture behavior of materials are calculated from stress distributions acting on crack surfaces, with the aid of superposition even for remote applied stresses. A method of evaluating such stress distributions from each mode of discontinuous displacement along a crack with mode I and II components has been proposed by the authors. In this study, the calculation method, which was restricted to constant stress fields, has been developed for use in nonuniform stress fields so that it can be applied to fatigue cracks with residual stresses in the wake of the propagation. Using this method, local stress distributions which control the crack deformation and stress intensity factors KΙ and KII for the fatigue crack were predicted under a mixed-mode stress condition, and effects of residual stresses near the fatigue crack on mode II crack deformation were discussed.
