FAILURE CRITERION OF ANISOTROPIC SAND WITH METHOD OF MACRO-MESO INCORPORATION
LI Xuefeng1，2，HUANG Maosong1，2，QIAN Jiangu1，2
(1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education，Tongji University，Shanghai 200092，China；2. Department of Geotechnical Engineering，Tongji University，Shanghai 200092，China)
Abstract：With the method of macro-meso incorporation，a failure criterion of anisotropic sand is proposed. A new anisotropic state variable is properly defined by two invariables of a joint tensor combined by loading direction tensor and fabric tensor from the mesoscopic point of view；then a failure criterion of anisotropic sand is put forward by introducing the new anisotropy state variable into macroscopic equation. In view of the relationship between fabric and stress state，the proposed criterion not only can describe the effect of mesostructure on material anisotropy under conditions of non-rotating and rotating stresses，but also has the clear physical significance parameters. Verifying the proposed criterion with a series of experimental data，the results show that the effects of mesostructure on anisotropic strength and peak friction angle are well captured by the proposed criterion under three-dimensional condition；and the adaptability and validity of the method can be confirmed from the comparison and analysis of calculated results.
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2010, Vol. 29 
