A delayed damage model for the prediction of dynamic fracture experiments

Application on metallic structures

Authors

  • Arnaud Suffis Laboratoire d’Etude de Dynamique Commissariat a l’Energie Atomique - Saclay F-91191 Gif-Sur-Yvette cedex
  • Alain Combescure LaMCoS INSA-Lyon UMR CNRS 5259 18-20 Allée des sciences F-69621 Villeurbanne
  • Pierre Chevrier Laboratoire de Physique et de Mecanique des Materiaux Universite de Metz Ile de Saulcy, F-57045 Metz cedex 01

DOI:

https://doi.org/10.13052/REMN.16.601-625

Keywords:

identification, delayed damage, plate impact, spalling, finite element, numerical localization

Abstract

A delayed damage model was recently introduced to avoid artificial localization and mesh dependence in a softening material during a finite element analysis. This model is also interesting for transient applications because it requires only local information to predict damage and plastic strain rates. The physical idea behind this model is that the void growth rate cannot be infinite and hence the damage rate must be bounded. This paper shows that such a model does not require artificial numerical parameters and can be identified using classical spall fracture experiments. It was applied successfully to experiments performed on two aluminum alloys and one titanium alloy. The identification of the delayed damage parameters is presented. The model is applied to a simple numerical experiment which shows clearly that it avoids artificial numerical localization.

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Published

2007-09-20

How to Cite

Suffis, A., Combescure, A. ., & Chevrier, P. . (2007). A delayed damage model for the prediction of dynamic fracture experiments: Application on metallic structures. European Journal of Computational Mechanics, 16(5), 601–625. https://doi.org/10.13052/REMN.16.601-625

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