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Identification of Elasto-Plastic Constitutive Parameters from Statically Undetermined Tests Using the Virtual Fields Method

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Abstract

This paper presents an experimental validation of the use of the virtual fields method to identify the elasto-plastic behaviour of an iron specimen from full-field measurements with the grid method and a simple heterogeneous test configuration. The experimental procedure is carefully detailed since it is of primary importance to obtain good identification results. In particular, the use of two back-to-back cameras has proved essential to eliminate out-of-plane effects. Then, the procedure for extracting the elastic parameters and the parameters of a Voce’s hardening model using the virtual fields method is presented. The results are very convincing and encouraging for future developments using more complex test geometries leading to fully multi-axial stress states. It is a first step towards the development of such inverse procedures as an alternative to difficult and costly methods involving homogeneous tests using multi-axial testing machines.

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Authors and Affiliations

  1. Laboratoire de Mécanique et Procédés de Fabrication (JE 2381), Ecole Nationale Supérieure d’Arts et Métiers, Rue Saint-Dominique, BP 508, 51006, Châlons-en-Champagne Cedex, France

    Y. Pannier, S. Avril (SEM member), R. Rotinat (SEM member) & F. Pierron (SEM member)

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  1. Y. Pannier
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  2. S. Avril
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  3. R. Rotinat
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  4. F. Pierron
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Correspondence to R. Rotinat.

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Pannier, Y., Avril, S., Rotinat, R. et al. Identification of Elasto-Plastic Constitutive Parameters from Statically Undetermined Tests Using the Virtual Fields Method. Exp Mech 46, 735–755 (2006). https://doi.org/10.1007/s11340-006-9822-x

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  • DOI: https://doi.org/10.1007/s11340-006-9822-x

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