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Title of Journal: J Cent South Univ

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Abbravation: Journal of Central South University

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Springer Berlin Heidelberg

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DOI

10.1002/jsfa.2740050809

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ISSN

2227-5223

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Development of nonlinear crossanisotropic model f

Authors: Cheng Chen Zhengming Zhou
Publish Date: 2013/07/10
Volume: 20, Issue: 7, Pages: 1992-2000
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Abstract

Numerous experimental studies reveal that the mechanical and deformational behaviors of sands are dependent on the combined effect of void ratio and stress To predict this complex behavior of sands a hypoelastic model is developed based on the crossanisotropic elasticity model which involves four parameters bulk module tangent Young’s module volume deformation coefficient and Poisson ratio A parameter defined as virtual peak deviatoric stress dependent on state parameter is introduced into hyperbolic stressstrain relationship to determine tangent Young’s module In addition an existing fitting equation for isotropic compression curves and an existing dilatancy equation which can consider the effect of state of sands are employed to determine bulk module and volume deformation coefficient Thirteen model constants are involved in the proposed model the values of which are fixed for a sand over a wide range of initial void ratios and initial confining pressures Well known experimental data for drained and undrained triaxial compression tests of Toyoura sand are successfully modeled

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