Résumé
Abstract:It is well known that the temperature of a shot peened part notably increases duringthe treatment. These thermal effects are seldom considered in experimental ornumerical work related to shot peening. It is of interest to evaluate precisely thequantity of kinetic energy of the shot that is transformed into heat during the impact.This could be of interest to develop non-destructive methods to evaluate the shotpeening process and to improve the existing numerical models for shot peening.The purpose of this paper is to present a model of a single shot impacting a part andto analyze the thermal effects due to the shot. A dedicated experimental device hasbeen developed in order to realize thermal measurements during and after theimpact: a high-frequency infrared camera records thermal maps of the rear face ofthe steel plate submitted to the impact; then, an adapted thermal model, togetherwith a Gauss-Newton parameter identification procedure allows the identification ofthe heat source. The experiment is modeled using finite element analysis including athermo-elasto plastic model. This allows to quantify the thermal history of variousparts of the specimen and to evaluate the coupling between the mechanical behaviorand the temperature field.