每年出版 6 期
ISSN 打印: 1543-1649
ISSN 在线: 1940-4352
Indexed in
MULTISCALE MODEL FOR DAMAGE-FLUID FLOW IN FRACTURED POROUS MEDIA
摘要
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.
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Eghbalian Mahdad, Wan Richard, Pouragha Mehdi, Fung Larry S., Numerical modeling of fracturing in permeable rocks via a micromechanical continuum model, International Journal for Numerical and Analytical Methods in Geomechanics, 43, 10, 2019. Crossref
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Eghbalian Mahdad, Pouragha Mehdi, Wan Richard, A three‐dimensional multiscale damage‐poroelasticity model for fractured porous media, International Journal for Numerical and Analytical Methods in Geomechanics, 45, 5, 2021. Crossref
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Wan Richard G., Eghbalian Mahdad , Pouragha Mehdi , Fung Larry S.K., Multiscale Computations of Hydraulic Fracture Propagation in Low-Permeability Heterogeneous Rocks, Day 2 Thu, April 11, 2019, 2019. Crossref