Title: Ductile fracture prediction in metal forming processes

Authors: M. Vaz Jr., N. De Santi Jr., G.O. Verran

Addresses: Department of Mechanical Engineering, State University of Santa Catarina, 89223-100 Joinville, Brazil. ' Department of Product Design, Schulz S.A., 89219-000 Joinville, Brazil. ' Department of Mechanical Engineering, State University of Santa Catarina, 89223-100 Joinville, Brazil

Abstract: Numerical prediction of ductile failure in metal forming processes under generic deformation paths has been a challenge to researchers. Ductile fracture indicators for tensile-dominant problems have been described in the literature since early nineties; however, compressive-dominant forming operations yield different failure mechanisms, which cause most of the classical indicators to fail. This work describes a modelling strategy based on damage concepts which accounts for both void opening (tension) and void closure (compression) effects. The numerical results are validated against experimental results for compression tests and tensile tests of notched specimens.

Keywords: finite element method; FEM; material failure; damage mechanics; ductile fracture; fracture prediction; metal forming; modelling; void opening; tension; void closure; compression tests; tensile tests.

DOI: 10.1504/IJMMS.2008.020508

International Journal of Mechatronics and Manufacturing Systems, 2008 Vol.1 No.2/3, pp.232 - 242

Published online: 28 Sep 2008 *

Full-text access for editors Access for subscribers Purchase this article Comment on this article