Practical Verification of Ductile Failure Curves

Abstract

This paper deals with the ductility of workpiece materials in connection with forming. The concept of the failure curve is used as a phenomenological means to describe the ductility in dependence on the state of stress. On the basis of analysis and experiment, two different forming operations are studied in order to evaluate the practical relevance of ductile failure curves. These processes are sheet bending and backward can extrusion. As an illustrative material, recycled aluminium of moderate ductility is used.