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

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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https://hal-emse.ccsd.cnrs.fr/emse-00506126
Contributor : Pierre Charles Pinoli <>
Submitted on : Tuesday, July 27, 2010 - 12:29:29 PM
Last modification on : Thursday, February 7, 2019 - 3:10:19 PM

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Yannick Pannier, Stéphane Avril, René Rotinat, Fabrice Pierron. Identification of Elasto-Plastic Constitutive Parameters from Statically Undetermined Tests Using the Virtual Fields Method. Experimental Mechanics, Society for Experimental Mechanics, 2006, 46 (6), pp.735-755. ⟨10.1007/s11340-006-9822-x⟩. ⟨emse-00506126⟩

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