[Influence des effets capillaires sur la résistance d'un milieu poreux non saturé]
The mechanical behavior of a partially saturated porous medium is addressed by means of a micro-to-macro reasoning. First, an estimate of the quadratic average over the solid phase of the equivalent shear strain is proposed. The latter is used in the framework of a nonlinear homogenization technique (‘modified secant’ method) in order to model the nonlinear poroelastic behavior in partially saturated conditions. The determination of the macroscopic strength criterion is then considered. Finally, the influence of membrane tension effects on strength is investigated.
On met en œuvre une démarche de changement d'échelle pour étudier le comportement mécanique d'un milieu poreux non saturé. On propose d'abord une estimation de la moyenne quadratique sur la phase solide, supposée élastique linéaire, de la déformation déviatorique équivalente. Celle-ci est mise à profit ensuite pour la modélisation du comportement poroélastique non linéaire dans le cadre d'une méthode d'homogénéisation non linéaire de type « sécante modifiée ». Pour finir, on présente une détermination approchée du critère de rupture macroscopique et on étudie l'influence des tensions de membrane sur ce critère.
Accepté le :
Publié le :
Mots-clés : Milieu poreux, Homogénéisation non linéaire, Résistance, Non saturé
Luc Dormieux 1 ; Julien Sanahuja 2 ; Samir Maghous 1
@article{CRMECA_2006__334_1_19_0,
author = {Luc Dormieux and Julien Sanahuja and Samir Maghous},
title = {Influence of capillary effects on strength of non-saturated porous media},
journal = {Comptes Rendus. M\'ecanique},
pages = {19--24},
publisher = {Elsevier},
volume = {334},
number = {1},
year = {2006},
doi = {10.1016/j.crme.2005.11.004},
language = {en},
}
TY - JOUR AU - Luc Dormieux AU - Julien Sanahuja AU - Samir Maghous TI - Influence of capillary effects on strength of non-saturated porous media JO - Comptes Rendus. Mécanique PY - 2006 SP - 19 EP - 24 VL - 334 IS - 1 PB - Elsevier DO - 10.1016/j.crme.2005.11.004 LA - en ID - CRMECA_2006__334_1_19_0 ER -
Luc Dormieux; Julien Sanahuja; Samir Maghous. Influence of capillary effects on strength of non-saturated porous media. Comptes Rendus. Mécanique, Volume 334 (2006) no. 1, pp. 19-24. doi : 10.1016/j.crme.2005.11.004. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2005.11.004/
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