Numog VI

Calibration and numerical validation of a micromechanical damage model

Abstract

The mechanical behaviour of brittle geomaterials is strongly determined by the growth and nucleation of microcracks. In the present work, a micromechanical damage model is numerically implemented and calibrated on a sandstone. First we present the general framework and the physical features assumed for the anisotropic damage. Then, the model is used to simulate the mechanical behaviour of the material under triaxial and proportional compression. The results show good agreements between the experience and the model predictions, and allow to give more insight on the dominant mechanisms of deformation.

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