A comparative micromechanical analysis of the effective properties of a geomaterial: Effect of mineralogical compositions |
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Authors: | A Abou-Chakra Guéry F Cormery J-F Shao D Kondo |
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Institution: | 1. Université de Toulouse, UPS, INSA, LMDC (Laboratoire Matériaux et Durabilité des Constructions), 135, Avenue de Rangueil, F-31 077 Toulouse Cedex 04, France;2. Laboratory of Mechanics of Lille, UMR 8107, Cité Scientifique, 59655 Villeneuve d’Ascq, France |
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Abstract: | 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. |
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Keywords: | Geomaterials Linear homogenization Homogenization schemes Experimental validation Rock micromechanics |
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