Title: A new approach for the modelling of residual stresses induced by turning of 316L austenitic stainless steel
Authors: Frederic Valiorgue, Joel Rech, Hedi Hamdi, Philippe Gilles, Jean Michel Bergheau
Addresses: LTDS/ENISE, 58 rue Jean Parot, Saint Etienne 42023, France. ' LTDS/ENISE, 58 rue Jean Parot, Saint Etienne 42023, France. ' LTDS/ENISE, 58 rue Jean Parot, Saint Etienne 42023, France. ' AREVA, Tour AREVA, Paris la Defense Cedex 92024, France. ' LTDS/ENISE, 58 rue Jean Parot, Saint Etienne 42023, France
Abstract: Several phenomena are involved in residual stresses generation: mechanical effects, thermal effects, microstructure modifications and/or a combination of the previous mechanisms. A lot of experimental investigations have shown the influence of machining parameters on the distribution of residual stresses but only few works have tried to model the fundamental phenomena. Past works tried to model the chip removal process by means of finite element software. Such models are very limited to predict accurately the residual stresses profiles in very narrow affected layers (some micrometers). The idea presented in this paper consists in disconnecting the chip formation process and the modelling of the mechanisms leading to the residual stresses. This approach needs to quantify the thermomechanical loads induced by the cutting tool onto the machined surface. Secondly, a finite-element model simulates the application and the movement of this thermomechanical load on to the machined surface so as to predict the residual stresses induced.
Keywords: residual stress; turning; 316L austenitic stainless steel; numerical modelling; thermomechanical loads; FEM; finite element method.
International Journal of Machining and Machinability of Materials, 2008 Vol.4 No.2/3, pp.275 - 286
Published online: 13 Feb 2009 *Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article