考虑岩土材料各向异性与应力方向性的等效非线性模型

doi:10.13722/j.cnki.jrme.2017.0883

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Abstract In order to describe the anisotropy and the stress direction dependence of geomaterials，a new stress tensor，named the equivalent stress tensor，was defined on the basis of the internal stress of granular materials，so that the stress magnitude，fabric level together with the directional relationship between the stress and fabric can be described. The isotropic constitutive models were used to describe the mechanical properties of particle interfaces and the equivalent stress was used to describe the contact stress between particles. The existing isotropic models can be modified into the anisotropic ones with the equivalent stress method. A new non-linear model was thus established which takes the anisotropy and the stress direction dependence of geomaterials into account. The new model has only three parameters which can be determined by the rigorous theoretical calculations and simple laboratory tests. The nonlinear model predicts accurately the anisotropic shear deformation and peak strength of specimens from the results of shear tests with the principal stress in fixed direction.

Key words： geotechnical engineering equivalent stress stress directivity anisotropy nonlinear model deformation

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	Articles by authors
	DONG Tong1
	2
	KONG Liang2
	ZHENG Yingren1
	YUAN Qingmeng2
	LIU Wenzhuo2

Cite this article:

DONG Tong1,2,KONG Liang2, et al. Equivalent nonlinear model considering the anisotropy and the stress directionality of geomaterials[J]. , 2018, 37(2): 506-512.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2017.0883 OR http://www.rockmech.org/EN/Y2018/V37/I2/506

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