Investigation of the viscous and thermal effects on ductile fracture in sheet metal blanking process

Citation:

A. Rafsanjani, S. Abbasion, N. Irani, and A. Farshidianfar. 2009. “Investigation of the viscous and thermal effects on ductile fracture in sheet metal blanking process.” The International Journal of Advanced Manufacturing Technology, 45, 5-6, Pp. 459-469. Publisher's Version

Abstract:

In this paper, a methodology is proposed to predict the ductile damage in the sheet metal blanking process using a coupled thermomechanical finite-element method. A constitutive material model combined with the ductile fracture criteria was used. The effect of material softening due to the heat generated during plastic work in a specimen was considered in blanking simulations. To verify the validity of the proposed model, several blanking simulations are performed and the results compared with those obtained from an experimental study. The interaction of fracture initiation and temperature distribution in the sheet metal during the process was studied. The effect of velocity and the clearance on the product shape were examined. It was seen that at high punch speeds the viscous and thermal effects have significant effects on product quality.

Last updated on 10/01/2016