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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Experimental Mechanics, Society for Experimental Mechanics, 2006, 46 (6), pp.735-755. 〈10.1007/s11340-006-9822-x〉
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Soumis le : mardi 27 juillet 2010 - 12:29:29
Dernière modification le : mercredi 29 novembre 2017 - 09:43:10

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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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