Pages 145-153
Based on the interface element proposed in the first report, a computational method for the analysis of dynamic crack propagation is developed by introducing the effect of inertia force. The proposed method is applied to the dynamic crack propagation in prestressed elastic plate with a center-crack and the analysis of Charpy impact test. In case of the elastic plate, it is numerically shown that the crack propagation speed increases with the prestress and it converges to the Rayleigh's wave speed. It is also shown that the crack propagation speed is determined only by the surface energy and independent on the bonding strength. Through the simulation of Charpy test, it is found that the strength increases but both the ductility and the absorbed energy decrease when the yield stress becomes large.
