SharePoint
Aide
Faire avancer la sûreté nucléaire

La Recherchev2

Publications

Elastic behavior of porous media with spherical nanovoids


Fermer

Authentification

Email :

Mot de passe :

​International Journal of Solids and Structures, Volume 84, 1 mai 2016, Pages 99-109

Type de document > *Article de revue

Mots clés >

Unité de recherche > IRSN/PSN-RES/SEMIA/LPTM

Auteurs > HALLER Xavier, MONERIE Yann, PAGANO Stéphane, VINCENT Pierre-Guy

Date de publication > 01/05/2016

Résumé

​This study is devoted to the effective elastic properties of nanoporous media containing spherical nanovoids. Nanocomposites materials are strongly dependent on their nanometric characteristic lengths. This size effect cannot be directly modeled using the classical homogenization schemes based on the Eshelby inclusion problem. However recent studies have extended the continuum mechanics and well-known micromechanical models to the nanoscale. In this paper, it is shown that these models can be replaced in a unified framework using the morphologically representative pattern-based approach of Stolz and Zaoui (1991) and therefore can be generalized to more complex microstructures. Following this approach, new bounds and estimates are derived. Two particular cases are treated: (i) the case of an ellipsoidal spatial distribution of the voids, (ii) the case of a biporous material containing both spherical nanovoids and randomly oriented spheroidal microvoids. The second case is typical of the microstructure of the irradiated uranium dioxide (UO2). Thereby, the associated result could be used for determining the poro-elastic properties of these doubly voided materials.