par Massart, Thierry,Jacques ;Selvadurai, Patrick A.P.S.
Référence Canadian Conference on Nonlinear Solid Mechanics(4th: July 2013: Montreal, Canada), Proceedings of 4th the Canadian Conference on Nonlinear Solid Mechanics
Publication Publié, 2013-07-31
Publication dans des actes
Résumé : A computational homogenization technique was recently used to investigate the role of dilatancy on the stress-induced permeability evolution in a granitic material. A representative volume element (RVE) accounting for the fabric of the heterogenous geomaterial can be combined with a fine-scale dilatant interfacial decohesion model for this purpose. This approach is extended in this paper to the context of excavation damage. The proposed computational homogenisation procedure is exploited within a FE² approach. A finite element approach is used at the macroscopic scale to model the material degradation caused by excavation, using representative volume elements to deduce the material response of each macroscopic point. The results of such computations are next used as a basis to evaluate the ensuing permeability evolution by homogenising the fluid transport properties of the corresponding degraded RVEs.