Thermo-Elasto-Plastic Model for Shot Peening: A Numerical and Experimental Approach

Author:  Rouquette Rouhaud Pron Fran
Source:  Conf Proc: ICSP-9 (pg 113-118)
Doc ID:  2005060
Year of Publication:  2005
Abstract:  
ABSTRACT It is well known that the temperature of a shot peened part notably increases during the treatment. These thermal effects are seldom considered in experimental or numerical work related to shot peening. It is of interest to evaluate precisely the quantity 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 shot peening 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 and to analyze the thermal effects due to the shot. A dedicated experimental device has been developed in order to realize thermal measurements during and after the impact: a high-frequency infrared camera records thermal maps of the rear face of the steel plate submitted to the impact; then, an adapted thermal model, together with a Gauss-Newton parameter identification procedure allows the identification of the heat source. The experiment is modeled using finite element analysis including a thermo-elasto plastic model. This allows to quantify the thermal history of various parts of the specimen and to evaluate the coupling between the mechanical behavior and the temperature field.