Modeling of multiple shots for analyzing shot peening controlled parameters on formed curvature radius

The desired peening outcome of the peening process like curvature is based on the reasonable determination of shot peening (SP) parameters. In this work, an assessment about accuracy of randomly distributed shots model was performed by comparing the experimental test. And, the comprehensive nonlinear dynamic elastic-plastic finite element analysis was conducted to reveal the difference between the regularly ordered shots model and the randomly distributed shots model in terms of induced stress and residual stress. The comparison indicated a difference between those two kinds of models under high coverage. Based on the randomly distributed shots model, we also found curvature radius increased with increasing thickness but decreased with shot velocity and increasing coverage. At last, we analyzed the reason by associating the residual distributions. Contrary to the shot peening parameters, shot velocity and coverage, the thickness of the strip is the most influential factor which inhibits the decrease of curvature radius. It should be noted that the over-high impact velocity will lead to a buckling distortion on the strip. Furthermore, the relation between the impact velocity and coverage was developed.