Ductile fracture prediction in metal forming processes. (29th September 2008)

• Record Type: Journal Article
• Authors: Vaz Jr., M.; De Santi Jr., N.; Verran, G.O.
• Is Part Of: International journal of mechatronics and manufacturing systems. Volume 1:Number 2/3(2008)
• Page Start: 232
• Page End: 242
• Publication Date: 2008-09-29
• Subjects: finite element method -- FEM -- material failure -- damage mechanics -- ductile fracture -- fracture prediction -- metal forming -- modelling -- void opening -- tension -- void closure -- compression tests -- tensile tests; Mechatronics -- Periodicals; 629.89
• Languages: English
• ISSNs: 1753-1039

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.