Simulation and Modeling Investigation into Catastrophic Front-Side Bursting under Hypervelocity Impact on Pressure Vessels

Lagrange methods in AUTODYN-2D is used for investigate the relationships between impact hole size, crack size. According to characteristics of impact hole, Simply model of the impact hole is built. The model is presented by postulates the existence of two-radial cracks that emanate at the boundary of a circular hole. The relationships of impact hole size, crack size, gas pressure and the stress intensity factor which is determined by simplified linear elastic fracture mechanics are obtained. The damage process of the front wall is analyzed. The prediction model for damage and failure of front wall is built. The critical stress value is obtained.