Abstract
Oblique incidence is often observed in the peening process due to the geometric complexity of some of the treated targets. Obliquity of the jet stream also exists as a result of the way the shots are propelled. It is therefore the purpose of this study to conduct a realistic 3D finite element (FE) analysis of the peening process involving a large number of shots impinging simultaneously at a rate sensitive target made from Ti-6Al-4V. A novel periodic cell model is developed and used to examine the effect of oblique incidence upon the induced plastic strains and residual stresses. Some aspects of the simulation are first validated against published work in literature. The periodicity of the model is also examined and verified. A parametric study is further conducted to investigate the effect of various parameters involved in peening process using the newly proposed model. Several conclusions are drawn concerning the effect of incident angle, shot diameter and friction coefficient upon the generated residual stress and plastic strain fields.
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