Identification des paramètres matériau à partir d'un essai hétérogène par mesures de champs

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HAL Id: hal-01495626

https://hal.archives-ouvertes.fr/hal-01495626

Submitted on 25 Mar 2017

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Identification des paramètres matériau à partir d’un essai hétérogène par mesures de champs

Pascale Balland, Laurent Tabourot, Olga Incandela, Christophe Déprés

To cite this version:

Pascale Balland, Laurent Tabourot, Olga Incandela, Christophe Déprés. Identification des paramètres matériau à partir d’un essai hétérogène par mesures de champs. 8e Colloque national en calcul des structures, CSMA, May 2007, Giens, France. �hal-01495626�

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Université de Savoie,

Laboratoire SYstèmes et Matériaux pour la MEcatronique, Polytech’Savoie, BP 80439, F 74 944 Annecy le Vieux Cedex.

pascale.balland@univ-savoie.fr

RÉSUMÉ. Une méthode d’identification et de recalage des paramètres de la loi de comportement de la tôle et des coefficients de frottement entre la tôle et les outils pour rendre les simulations d'opérations d'emboutissage par code éléments finis réalistes et fiables est proposée.

Le principe consiste notamment à rechercher le jeu de paramètres qui permette la meilleure reproduction par simulation numérique d'un essai hétérogène. La méthode de stéréo- corrélation est alors utilisée pour déterminer, lors de l'essai, les cartographies de déformations qui serviront, avec l’évolution de la force, de cibles pour l'ajustement des paramètres.

ABSTRACT. A method of identification of parameters of behaviour laws for a sheet of metal and of friction parameters between the metal and the tools is proposed to make the simulations of deep-drawing operations by finite element code realistic and accurate.

The principle consists in finding the set of parameters which enables to reproduce by numerical simulation the heterogeneous test. The stereo-correlation method is then used to complete the evolution of the load of the punch with the data of the cartography of strains as references in order to adjust the parameters.

MOTS-CLÉS :– identification de paramètres – lois de comportement – essai hétérogène – emboutissage.

KEYWORDS:– identification of parameters – behaviour constitutive laws – heterogeneous test - deep-drawing operation.

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