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Article Dans Une Revue Engineering Fracture Mechanics Année : 2022

Determination of the fracture energy of rocks from size effect tests: Application to shales and carbonate rocks

Résumé

An experimental technique based on size effect for the measurement of the fracture energy of rocks from core-based specimen is presented. It requires a simple apparatus and specimens may be easily obtained from cores. In order to obtain the fracture energy of the material, the non-dimensional energy release rate appearing in the size effect law, which is not available in the literature, needs to be computed first. This is done with the help of a continuum damage model. Computations have been performed for 4 different geometrically similar specimens and for 3 different values of the fracture energy. The non-dimensional energy release rate is back calculated from the fits of the size effect law. For the shale rocks tested, we obtain a fracture energy in between 86 J/m2 and 90 J/m2. For the limestones, we obtain a wider range, from 8 J/m2 to 70 J/m2, depending on their porosity.

Domaines

Génie civil

Dates et versions

hal-04193943 , version 1 (01-09-2023)

Identifiants

Citer

Gilles Pijaudier-Cabot, Alireza Hajimohammadi, Olivier Nouailletas, Christian La Borderie, Anton Padin, et al.. Determination of the fracture energy of rocks from size effect tests: Application to shales and carbonate rocks. Engineering Fracture Mechanics, 2022, 271, pp.108630. ⟨10.1016/j.engfracmech.2022.108630⟩. ⟨hal-04193943⟩
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