A Micromechanical Model for Time Dependent Behavior Related to Subcritical Damage in Quasi Brittle Rocks
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 micromechanicai 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.
argillite subcritical crack growth micromechanical model
Yaoying Huang J.F.Shao
LML,UMR 8107 CNRS,University of Lille,59655,Villeneuve dAscq,France College of Civil and Transportation Engineering,HOHAI University,Nanjing China
国际会议
北京
英文
323-326
2012-10-15（万方平台首次上网日期，不代表论文的发表时间）