Comptes Rendus
An approximate solution to the problem of cone or wedge indentation of elastoplastic solids
Comptes Rendus. Mécanique, Volume 333 (2005) no. 5, pp. 389-395.

The model developed in this Note makes it possible to determine the value of the mean indentation pressure usually named hardness from the elastoplastic properties of materials and also the shape of the cone or that of the wedge. The approximation rests upon the definition of a linear elastic solid which has the same indentation pressure as the material actually indented. Cases of cone and wedge indentation are studied. A method to determine the uniaxial stress–strain curve of materials from indentation tests is given. The results are validated using finite element simulations.

Le modèle développé dans cette Note permet de déterminer la valeur de la pression moyenne d'indentation (habituellement dénomée dureté) à partir des propriétés élastoplastiques des matériaux. L'approximation développée repose sur la définition d'un solide élastique linéaire dont la pression moyenne d'indentation est la même que celle du matériau réellement indenté. Une méthode d'identification de la courbe contrainte-déformation uniaxiale à partir d'essais d'indentation est proposée. Les résultats sont ensuite validés à l'aide de calculs par éléments finis.

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DOI: 10.1016/j.crme.2005.04.001
Keywords: Solids and structures, Cone Indentation, Elastoplasticity, Representative stress, Identification method
Mot clés : Solides et structures, Indentation cônique, Elastoplasticité, Contrainte représentative, Méthode d'identification

Guillaume Kermouche 1; Jean-Luc Loubet 2; Jean-Michel Bergheau 1

1 LTDS, UMR 5513 CNRS/ECL/ENISE, 58, rue Jean-Parot, 42023 Saint-Etienne cedex 2, France
2 LTDS, UMR 5513 CNRS/ECL/ENISE, 36, avenue Guy-de-Collongue, 69134 Ecully cedex, France
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Guillaume Kermouche; Jean-Luc Loubet; Jean-Michel Bergheau. An approximate solution to the problem of cone or wedge indentation of elastoplastic solids. Comptes Rendus. Mécanique, Volume 333 (2005) no. 5, pp. 389-395. doi : 10.1016/j.crme.2005.04.001. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2005.04.001/

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