Original Article

A multiphysics model to predict the surface integrity of EDM machined parts

¹ Higher Institute of Technological Studies of Nabeul, Department of Mechanical Engineering, University Campus, Mrezgua, 8000, Nabeul, Tunisia
² Laboratoire de Mécanique, Matériaux et Procédés, ENSIT, 5 Avenue Taha Hussein Montfleury, 1008, Tunis, Tunisia

^* e-mail: adnen.tlili@nabeul.r-iset.tn
^a These authors contributed equally to this work.

Received: 31 August 2023
Accepted: 11 December 2023

Abstract

This study presented a numerical methodology to elucidate the local mechanical response of the surface layer during and after an EDM electrical discharge, aiming to refine the numerical prediction of the residual stress and strain hardening induced by this process. Advances in models, loads, and boundary conditions were proposed and simulated using the ABAQUS/Explicit computational software. A coherent thermomechanical model was formulated, incorporating Grüneisen’s hydrodynamic behavior coupled with the Johnson-Cook plasticity model. Numerical findings highlighted the efficiency of the uniform heat flux distribution model in predicting residual stresses accurately.