J. Phys. IV France
Volume 105, March 2003
Page(s) 3 - 10

J. Phys. IV France
105 (2003) 3
DOI: 10.1051/jp4:20030165

Constitutive parameters identification for elastoplastic materials in finite deformation

H. Bel Hadj Salah1, A. Khalfallah1, A. Znaidi1, A. Dogui1 and F. Sidoroff2

1  Laboratoire de Génie Mécanique, École Nationale d'Ingénieurs de Monastir, Av. Ibn El Jazzar, 5019 Monastir, Tunisia
2  Laboratoire de Triobologie et Dynamique des Systèmes, École Centrale de Lyon, 36 avenue Guy de Collongue, BP. 163, 69131 Ecully cedex, France

In this contribution, inverse identification methods of constitutive laws for elastoplastic behaviour are compared. These proposed inverse algorithms are composed on a finite element calculation combined with an optimisation procedure. They are applied to identify material anisotropic coefficients using a set up of easy performed tests. The used experimental data are the plane tensile test and the off axes tensile tests. The data correspond to various virtual elastoplastic orthotropic materials where quadratic or non quadratic criteria with or without associated normality are considered. Three identification methods are compared to find anisotropic parameters. Particular attention is devoted to the impact of the hypothesis on identified parameters.

© EDP Sciences 2003