Plasticity criterion for porous medium with cylindrical void

Yves-Patrick Pellegrini

doi:10.1016/S1631-0721(02)01527-9

Plasticity criterion for porous medium with cylindrical void
[Un critère de plasticité pour un matériau poreux à vide cylindrique]

Yves-Patrick Pellegrini ¹

¹ Département de physique théorique et appliquée, CEA, BP 12, 91680 Bruyères-le-Châtel, France

Comptes Rendus. Mécanique, Volume 330 (2002) no. 11, pp. 763-768.

Résumé
Abstract

On développe à partir du critère de Gurson un nouveau critère de plasticité pour un matériau poreux à vides cylindriques, en contraintes planes. D'une forme simple et sans paramètres ajustables, ce critère est non-analytique par rapport à la porosité et présente un point anguleux. Il reproduit de façon satisfaisante des résultats numériques récents de Francescato et al. pour différentes porosités.

A simple Gurson-based yield criterion for porous materials with cylindrical voids in plane stress is proposed. With no adjustable parameters, it compares quite satisfactorily with recent numerical data by Francescato et al. for different porosities. It is non-analytic with respect to the porosity, and displays an angulous point.

Reçu le : 2002-01-30
Accepté le : 2002-09-11
Publié le : 2002-10-09

DOI : 10.1016/S1631-0721(02)01527-9

Keywords: porous media, ductile behavior, perfect plasticity, Gurson model, cylindrical voids, homogenization
Mots-clés : milieux pareux, comportement ductile, plasticité parfaite, modèle de Gurson, cavités cylindriques, homogénéisation

Affiliations des auteurs :

Yves-Patrick Pellegrini ¹

¹ Département de physique théorique et appliquée, CEA, BP 12, 91680 Bruyères-le-Châtel, France

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Yves-Patrick Pellegrini. Plasticity criterion for porous medium with cylindrical void. Comptes Rendus. Mécanique, Volume 330 (2002) no. 11, pp. 763-768. doi : 10.1016/S1631-0721(02)01527-9. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/S1631-0721(02)01527-9/

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