Abstract
The serrated type of chip is formed by the occurrence of the localization of the plastic shear deformation, hi order to simulate the serrated type of chip formation, this study has considered Lemaitre's damage model. In Lemaitre model, there is only one parameter to control the damage rate. The damage rate will have a correlation with a value of the ductile fracture strain that is affected by both the stress triaxiality and Lode angle. Hence, this study considered the dependence of the stress triaxiality and Lode angle on the parameter. The numerical experiments were conducted by assuming three kinds of model for the parameter. A model that considers the effect of the reduction of the damage under high temperature and high compression as well as the effect of the stress triaxiality and Lode angle obtained appropriate chip formation.
