A thermodynamically consistent framework for saturated viscoplastic rock-materials subject to damage

DUFOUR ; WONG ; ARSON ; DELERUYELLE ; PEREIRA

Type de document
ARTICLE A COMITE DE LECTURE REPERTORIE DANS BDI (ACL)
Langue
anglais
Auteur
DUFOUR ; WONG ; ARSON ; DELERUYELLE ; PEREIRA
Résumé / Abstract
The aim of this study is to build a thermodynamically consistent theoretical framework to model viscoplasticity and damage in saturated geomaterials. The induced anisotropic damage is represented by a second-order tensor. The key point of the model formulation is the definition of a "double effective stress", stemming from the concept of "damaged effective stress" (used in Continuum Damage Mechanics to couple damage and viscoplasticity in solids), and from the concept of "hydro-mechanical effective stress" (used in poromechanics to account for solid-fluid interactions). The dissipation potential is expressed as a function of the "double effective stress", which makes it possible to couple creep, fluid flow and damage in a consistent framework. © 2012 Elsevier Ltd. All rights reserved.
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