A micromechanics-based gradient model and the effect of high-order stress and particle rolling on localizations for granular materials

被引：0
作者：
Chenxi Xiu
Xihua Chu
机构：
[1] Wuhan University,School of Civil Engineering
来源：
Granular Matter | 2017年 / 19卷
关键词：
Granular materials; Gradient model; Non-affine projection scheme; Micromechanics; Heterogeneity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
This study develops a gradient model to consider heterogeneity of granular materials by means of a thermo-micromechanics method and the hypothesis of kinematics. In this model, the macroscopic variables are related to the micro information by a non-affine projection scheme. Numerical examples illustrated the capability and performance of the presented model in modeling deformation patterns in case of considering particle rolling and not considering particle rolling, and investigated the validity for the stress–strain relation of the presented model.
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[1]  
Li X(2005)A discrete particle model and numerical modeling of the failure modes of granular materials Eng. Comput. 22 894-920
[2]  
Chu X(2015)Two scale modeling of behaviors of granular structure: size effects and displacement fluctuations of discrete particle assembly Struct. Eng. Mech. 55 315-334
[3]  
Feng Y(2000)Change of scale in granular materials Eur. J. Mech. A Solids 19 999-1014
[4]  
Chu X(2005)A consistent return mapping algorithm for pressure-dependent elastoplastic Cosserat continua and modelling of strain localisation Comput. Struct. 83 1-10
[5]  
Cun Y(1991)Simulation of strain localization: a reappraisal of the cosserat continuum Eng. Comput. 8 317-332
[6]  
Xiu C(1990)Constitutive relation for a particulate medium with the effect of particle rotation Int. J. Solids Struct. 26 437-453
[7]  
Cambou B(1987)The thickness of shear bands in granular materials Géotechnique 37 271-283
[8]  
Chaze M(1999)FEc—studies on the influence of initial void ratio, pressure level and mean grain diameter on shear localization J. Numer. Anal. Met. 23 2045-2074
[9]  
Dedecker F(2002)Patterns of shear zones in granular bodies within a polar hypoplastic continuum Acta Mech. 155 71-94
[10]  
Li X(2003)Numerical investigations of shear localization in a micro-polar hypoplastic material J. Numer. Anal. Met. 27 325-352
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