Identification of Constitutive Parameters using Hybrid ANN multi-objective optimization procedure

• DOI: 10.1007/s12289-008-0008-1
• Publication Date: 2008-03-28T22:37:02Z
• Authors: H. Aguir; A. Chamekh; H. BelHadjSalah; A. Dogui; R. Hambli
• Keywords: 0203 mechanical engineering; 02 engineering and technology

This paper deals with the identification of material parameters for an elastoplastic behaviour model with isotropic hardening using several experimental tests at the same time. But, these tests are generally inhomogeneous and finite element simulations are necessary for their analysis. Therefore an inverse analysis is carried out and the identification problem is converted into a multi-objective optimization where prohibitive computing time is required. We propose in this work a hybrid approach where Artificial Neural Networks (ANN) are trained by finite element results. Then, the multi objective procedure calls the ANN function in place of the finite element code. The proposed approach is exemplified on the identification of non-associative Hill’48 criterion and Voce parameters model of the Stainless Steel AISI 304.