Abstract
In France, an underground research laboratory is constructed in a clay formation, called Callovo-Oxfordian argillites. In order to evaluate quantitatively the structure durability, it is necessary to achieve a good understanding of the long-term behavior of the material. Subcritical crack growth is one of main causes of time-dependent behavior in rock. In order to rigorous modeling of the time-dependent behavior of studied material, a micromechanical model incorporated subcritical damage propagation is proposed for Callovo-Oxfordian argillites in this paper. In the proposed constitutive model, the argillite is considered as a two phase composite: the clay matrix and the mineral inclusion. Based on experimental observations [1], the clay matrix is described by a time-dependent damage model and the mineral inclusions are described by a linear elastic model. The passage from the micro-scale to the macro-scale is done through different homogenization schemes for studying their influences on the subcritical propagation of cracks.
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Huang, Y., Shao, J.F. (2013). A Micromechanical Model for Time Dependent Behavior Related to Subcritical Damage in Quasi Brittle Rocks. In: Yang, Q., Zhang, JM., Zheng, H., Yao, Y. (eds) Constitutive Modeling of Geomaterials. Springer Series in Geomechanics and Geoengineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-32814-5_44
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DOI: https://doi.org/10.1007/978-3-642-32814-5_44
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-32813-8
Online ISBN: 978-3-642-32814-5
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