The present work considers the impact pressure distribution of droplets striking the surface for predicting the stresses induced on it. It assumes that this impact pressure acts on the surface over a certain time period after which this pressure is released. It makes use of Reichardt's theory for predicting the droplet velocity distribution and liquid impact theory for predicting the impact pressure and duration of impact of high velocity droplets. For predicting residual stresses on the surface and sub surface of material subjected to water jet peening, transient dynamic elastic plastic finite element analysis was performed by considering multi set of droplets impact on target surface.
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