An Anisotropic Critical State Plasticity Model with Stress Ratio-Dependent Fabric Tensor

被引:12
作者
Norouzi, Narges [1 ]
Lashkari, Ali [1 ]
机构
[1] Shiraz Univ Technol, Dept Civil & Environm Engn, Shiraz, Iran
关键词
Sand; Fabric; Anisotropy; Critical state; Stress ratio; Flow liquefaction; GRANULAR SOILS; SAND; LIQUEFACTION; INSTABILITY; ELASTICITY; INHERENT; BEHAVIOR;
D O I
10.1007/s40996-020-00448-z
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This paper proposes a new constitutive model within the recent anisotropic critical state theory (ACST) to take into account the influence of evolving fabric on the stress-strain-strength response of anisotropic sands. Analytical proofs in support of stress-force-fabric correlations corroborate a clear connection between mobilization of the continuum level stress ratio and particle level fabric in granular media. A normalized stress ratio-dependent second-order fabric tensor is suggested here which fulfills the ACST. Dilatancy and plastic hardening modulus of a stress ratio-driven elastoplastic model with zero pure elastic domain are explicitly interrelated to the proposed stress ratio-dependent normalized fabric tensor. It is shown that the fabric-dependent model simulations agree well with the monotonic triaxial and hollow cylinder torsion shear tests data.
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页码:2577 / 2594
页数:18
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