Experimental evidence and analyses of results of three-dimensional (3D) tests show that the shape of the failure surface for soils is influenced by the microstructure. A fabric tensor employed in the method describes the material microstructure and a novel anisotropy state variable is properly defined in the term of the two joint invariant of loading direction tensor and fabric tensor, then a failure criterion of anisotropic soil is put forward with the novel anisotropy state. In view of the relationship of fabric and stress state, the proposed criterion not only can describe the effect of microstructure on material anisotropy on the condition of nonrotating and rotating stresses, but also it has a clear physical significance parameter. The failure criterion compared with experimental results show that it is able to capture the experimental behavior with good accuracy.
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