Elastic-Plastic Analysis on Residual Stress in a Metal by a Single Shot

Abstract

Dynamic elastic-plastic finite element analysis was carried out in order to clarify what quantity controls the distribution of residual stress in a metal induced by the impingement of a shot. The impingement was modeled by a single rigid shot and a S45C flat target, whose elastic-plastic behavior was assumed to be isotropic and independent of strain rate. The numerical analysis revealed that the maximum contact pressure q0 determined by the Hertz theory of elastic contact dominates the generation of residual stress distribution in a metal target by a single shot.