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Micromechanical modeling of mortar as a matrix-inclusion composite with drying effects

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2013
auteur(s) Chen Da; Shen Wan Qing; Shao Jian-Fu; Yurtdas Ismail
journal (abréviation) International Journal for Numerical and Analytical Methods in Geomechanics (Int J Numer Anal Meth Geomech)
volume (numéro) 37 (9)
pages 1034 – 1047
résumé A micromechanical analysis is presented for the description of elastic and plastic behavior of a cement-based material (mortar). The mortar is considered as a composite material constituted with cement paste and sand grain. The mechanical behavior of cement paste is described by an elastoplastic model, while a linear elastic behavior is adopted for sand grains. A non-linear homogenization approach based on Hill’s incremental model is proposed for the determination of macroscopic properties of mortar composite. Further, influences of water saturation degree on mechanical behavior are taken into account by considering capillary effects on plastic deformation of cement paste. Comparisons between numerical simulations and experimental data are presented.
mots clés composite materials; mortar; concrete; micromechanics; homogenization; desiccation
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