THERMO-ELASTO-PLASTIC MODEL FOR SHOT PEENING : A NUMERICAL AND EXPERIMENTAL APPROACH
Résumé
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.
Domaines
Sciences de l'ingénieur [physics]
Origine : Fichiers produits par l'(les) auteur(s)
