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A micromechanical model for porous materials with a reinforced matrix

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2016
auteur(s) Ghorbanbeigi Hamid; Shen Wan Qing; Yurtdas Ismail; Shao Jian-Fu
journal (abréviation) Mechanics Research Communications (Mech Res Comm)
volume (numéro) 72
pages 81 – 86
résumé In this study a micromechanical model is proposed for ductile porous material whose matrix is reinforced by small inclusions. The solid phase is described by a pressure sensitive plastic model. Based on works of Maghous et al. [6], a macroscopic plastic criterion is firstly obtained by using a two-step homogenization procedure. The effect of porosity at the mesoscale and the influence of inclusions at the microscale are taken into account simultaneously by this criterion. With a non-associated plastic flow rule, the micro-macro model is applied to modeling of mechanical behavior of a cement paste. In particular, we have considered at the microscopic scale the formation of calcite grains by carbonation process in the solid matrix. The studied cement paste is then seen as a reinforced matrix–pore system. Comparisons between numerical results and experimental data show that the proposed model is able to capture the main features of the mechanical behavior of the studied material.
mots clés Micromechanics; Multiscale approach; Porous materials; Cement paste; Carbonation
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