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A new impact test for the identification of a dynamic crack propagation criterion using a gas-gun device

Nistor, Ionel and Pantalé, Olivier and Caperaa, Serge A new impact test for the identification of a dynamic crack propagation criterion using a gas-gun device. (2006) Journal de Physique IV - Proceedings, vol. 134 . pp. 713-718. ISSN 1155-4339

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Official URL: http://dx.doi.org/10.1051/jp4:2006134110

Abstract

The modelling of damage and fracture behaviour under high rates of loadings for metallic structures presents the more and more interests for engineering design, especially for crash phenomena. In order to perform a numerical simulation of such phenomena a crack propagation criterion must be identified using adapted laboratory tests. The objective of this paper is to present a new impact test intended for the identification of a cohesive crack criterion implemented into a home-made FEM code based on Extended Finite ElementMethod. Therefore, a double-notched specimen is impacted using a gas-gun device in order to obtain different crack paths depending on projectile speed. A post-impact macro-photographic observation allows to measure the crack path, the angles and the advancing length. These experimental results are used as input responses in the identification procedure for determining the crack cohesive criterion parameters. Some experimental results, for an aluminium alloy crack criterion identification, are presented to illustrate the proposed approach.

Item Type:Article
Additional Information:Thanks to EDP Sciences editor. The definitive version is available at http://dx.doi.org/10.1051/jp4:2006134110
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Laboratory name:
Laboratoire Génie de Production - LGP (Tarbes, France) - Conception Mécanique Assistée par Ordinateur - CMAO
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Deposited By: Olivier Pantalé

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