Finite Element Simulation of Shot Peening

Author:  Andy Levers, Alan Prior
Source:  The Shot Peener magazine, Vol 09/Issue 3, Fall 1995
Doc ID:  1995013
Year of Publication:  1995
Abstract:  
Introduction The finite element method is well suited to the analysis of structures containing complex residual stress patterns, for example the springback of press formed sheet components after removal from the tool. It is clear that this method could also be used to examine the deformation of a component that contains a residual stress field created by shot peening. The difficulty in this simualtion is to identify the residual stress pattern created from a given shot peening process and to validate the deformation arising from that stress field during and after the peening process. In this paper we describe two investigations currently being undertaken into the use of finite element analysis for the examination of shot peening. The first uses an explicit finite element program to analyse in detail the stress field created by individual and repeated sht impacts. The second uses the implicit finite element method to creare stress fields in relatively simple structures and predict the resulting deformation. The combination of these two methods has enabled the deformarion of peened components to be predicted for a wide range of peening parameters and provides a valuable tool in the design and use of peening processes.