HIGH-SPEED IMPACT OF ELASTIC-PLASTIC WORK-HARDENING MATERIAL INTO A RIGID BOUNDARY

This paper described the case of impacting a cylindrical projectile of elastic-plastic work hardening material into a rigid boundary. A cyli ndrical impact test was performed, the basic technique involved firing a cylindrical projectile of copper material into a rigid anvil bar at speed ranging 50 to 250 m/s. Computer code based on finite difference numerical technique was developed to simulate the impact problem. Thi s code has the ability to predicate both the instantaneous profile and stress-strain distribution in the projectile following the impact wit h the rigid boundary. To demonstrate the capability of the developed c ode, comparisons are made between the developed code and experimental results in terms of the final shape of the deformed test specimen.