RT Journal Article ID 5e6bb7c9549c06ca A1 Wan, Richard A1 Eghbalian, Mahdad T1 MULTISCALE MODEL FOR DAMAGE-FLUID FLOW IN FRACTURED POROUS MEDIA JF International Journal for Multiscale Computational Engineering JO JMC YR 2016 FD 2016-11-07 VO 14 IS 4 SP 367 OP 387 K1 multiscale modeling K1 hydromechanical coupling K1 mean-field theory K1 Mori-Tanaka K1 homogenization K1 damage K1 microcrack growth AB The paper deals with a closed-form continuum description of coupled fluid flow-deformation behavior of porous media with distributed strong discontinuities. Based on the underlying physics of the solid and fluid phases at the microscale, the macroscopic hydro-mechanical (HM) behavior of a representative elementary volume is eventually retrieved in the fully saturated case using the mean-field theory and Mori-Tanaka Homogenization Scheme. The heterogeneity that governs the overall HM behavior is induced by evolving microcracks described by a crack density distribution tensor. Herein, only the shape and orientation of microcracks are accounted for in the upscaling process. Examples are presented to assess the robustness of the proposed mathematical formulation. Finally, the evolution of heterogeneity in poromechanical parameters as well as hydraulic properties of the system is investigated by coupling a microcrack growth formulation under general loading conditions with fluid flow. We will briefly discuss, through material point simulations, how the proposed model can capture localized deformations and corresponding fluid transmission behavior starting from an initially homogeneous state. PB Begell House LK https://www.dl.begellhouse.com/journals/61fd1b191cf7e96f,2b8c00292c2d9c29,5e6bb7c9549c06ca.html