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A comparative micromechanical analysis of the effective properties of a geomaterial: Effect of mineralogical compositions

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2010
auteur(s) Abou-Chakra Guery Ariane; Cormery Fabrice; Shao Jian-Fu; Kondo Djimédo
journal (abréviation) Computers and Geotechnics (Computers and Geotechnics)
volume (numéro) 37 (5)
pages 585 – 593
résumé In order to provide a physical interpretation of the variation of the mechanical properties of Callovo-Oxfordian argillite with mineral composition, we implement three linear homogenization schemes. The argillite is modeled as a three phase material composed of a clay matrix and inclusions of quartz and calcite. It is shown that, unlike the dilute scheme and the self-consistent scheme, the Mori-Tanaka model describes the in situ experimental data well. The determined properties are finally used in a finite element computation. The aim is to evaluate the effect of mineral composition on the elastic response of the excavation of a vertical shaft in the context of the underground laboratory of Meuse/Haute Marne.
mots clés Geomaterials; Linear homogenization; Homogenization schemes; Experimental validation; Rock micromechanics
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