A new approach for the modelling of residual stresses induced by turning of 316L austenitic stainless steel
by Frederic Valiorgue, Joel Rech, Hedi Hamdi, Philippe Gilles, Jean Michel Bergheau
International Journal of Machining and Machinability of Materials (IJMMM), Vol. 4, No. 2/3, 2008

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.

Online publication date: Fri, 13-Feb-2009

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