Abstract
This study is devoted to a micro-macro model of plastic deformation in a clayey rock which is composed of a ductile porous clay matrix and linear elastic mineral grains. By making use of nonlinear homogenization methods with a two-step homogenization procedure, we derive a closed form expression of the macroscopic plastic criterion which accounts for the effects of pores and of mineral inclusions simultaneously. Then, a non-associated flow rule is proposed. Comparisons between the predictions of the full micro-macro model and available experimental data show that the proposed model is able to capture the main features of the mechanical behavior of the clayey rock.KeywordsPorous MediumRigid InclusionMineral InclusionClayey RockClay MatrixThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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