An inverse analysis of the Erichsen Test applied for the automatic identification of sheet materials behavior
Abstract
Among the technological tests, the Erichsen drawing test gives a more appropriate material behavior, near the limit of the real manufactured process. In this paper an inverse finite element analysis of the Erichsen test is proposed. The new idea is to use a numerical simulation of the experimental test for the rheological identi-fication of the constitutive equations available for sheet metals alloys. The inverse analysis is based on a ro-bust optimization algorithm and uses simultaneously the experimental test data and the corresponding nu-merical one. A numerical inverse analysis software named OPTPAR was developed and improved for an automatically coupling with a commercial finite element code charged to simulate the experimental test. Re-sults obtained for a virtual steel alloy will be analyzed numerically in order to validate the finite element model and the identification method. An application to an AA5182 aluminum alloy and a DC03 steel alloy will be presented.