[Modélisation micromécanique des milieux poreux déformables]
Un principe de Terzaghi modifié est proposé pour décrire les phénomènes électro-chimico-mécaniques couplés dans des argiles gonflantes fortement compactées. Le modèle à deux échelles utilise la méthode de l'homogénéisation pour un système diphasique composé de particules d'argile saturées par une solution aqueuse d'un sel complètement dissocié. Quelques résultats numériques illustrent les résultats dans un cas particulier.
A modified Terzaghi principle is proposed to describe the influence of locally coupled electro-chemo-mechanical processes in highly compacted swelling clays upon the form of the macroscopic modified effective stress principle. The two-scale model is derived using the homogenization procedure to upscale the microscopic behavior of a two-phase system composed of clay particles saturated by a completely dissociated electrolyte aqueous solution. Numerical experiments are performed to illustrate the results in a particular cell geometry.
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Publié le :
Mots-clés : milieux poreux, argiles expansives, contrainte effective, homogénéisation, Poisson–Boltzmann, pression de (disjonction) gonflement
Márcio A. Murad 1 ; Christian Moyne 2
@article{CRMECA_2002__330_12_865_0,
author = {M\'arcio A. Murad and Christian Moyne},
title = {Micromechanical computational modeling of expansive porous media},
journal = {Comptes Rendus. M\'ecanique},
pages = {865--870},
publisher = {Elsevier},
volume = {330},
number = {12},
year = {2002},
doi = {10.1016/S1631-0721(02)01543-7},
language = {en},
}
Márcio A. Murad; Christian Moyne. Micromechanical computational modeling of expansive porous media. Comptes Rendus. Mécanique, Volume 330 (2002) no. 12, pp. 865-870. doi : 10.1016/S1631-0721(02)01543-7. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/S1631-0721(02)01543-7/
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