Author(s)

Y.F. Al-Obaid

Abstract

Multiple shot analysis in shot-peening using finite elements Y.F. Al-Obaid Faculty of Technological Studies, PAAET, f.O. Boz ABSTRACT A computer program OB AID has been used to analyze complex target plate and allows for dynamic loading due to impinging single and multiple shot. Theoretical model using three dimensional isoparametric finite element has been presented, in which a provision is made for the surface hardening and cyclic impact loading caused by multiple shots. Theoretical model agrees reasonably well with other models. INTRODUCTION Shot peening is viewed as a process involving multiple and progressively repeated impact. The object is to include compressive residual stresses in the surface of the target. A general form of residual stress in a typical shot-peening operation is shown in Figure 1. The impact of spherical shots, which usually takes place at a high velocity - 100 m/sec, also causes plastic deformation which results in chang

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