抄録
In this paper, we examine the implicit soil/water coupling elastic-plastic calculation algorithm with contact conditions on the crack surfaces in order to obtain stress and strain fields near a crack tip under the biaxial compressive loads. It is important to elucidate the fracture criterions under compressive loads such as the explanation of the existence and the creation of long faults, landslide in slope ground and so on. We find that the mode II crack extension can be explained by plastic effect near a crack tip using Cam-Clay model under the undrained condition. We also find, under the drain condition, that localized strain region appears perpendicularly from a crack tip, which caused by the softening plasticity with absorbency.
