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JMT 2011, Vol. 19 Issue (3) :186-198    DOI: 10.3969/j.issn.2095-087X.2011.03.007
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Numerical simulation of shear band localization in geotechnical materials based on a nonlocal plasticity model
Shouxin WU1, 2, Xingran WANG2*
l. School of Civi Engineering, Southwest Jiaotong University, Chengdu 610031, China;
2. Trenchless Technology Center, Louisiana Tech University, Ruston, LA 71272, USA

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Abstract A new nonlocal plasticity model,which is based on the integral-type nonlocal model and the cubic representative volumetric element(RVE),is proposed to simulate shear band localization in geotechnical materials such as soils and rocks.An algorithm is developed to solve the resulting nonlinear system of equations.In this algorithm,the nonlocal averaging of plastic strain over the RVE is evaluated using C0 elements instead of using C1 elements to solve the second-order gradient of plastic strains.To obtain the average plastic strain,a set of special elements,called the nonlocal elements,are constructed to approximate the RVE.The updating of average stresses of the local element is based on the nonlocal plastic strain of the corresponding nonlocal elements.Numerical examples show that meshindependent results can be achieved using the proposed model and the algorithm,and the thickness of the shear band is insensitive to the mesh refinement.
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Shouxin WU
Xingran WANG
Keywordsnonlocal plasticity   shear band localization   finite element   gradient plasticity   nonlocal element     
Received 2011-07-27;

support for this work provided by Louisiana Board of Regents (RCS and Pfund);high performance grid computing resources (HPC) provided by LONI (Louisiana Optical Network Initiative)

Cite this article:   
Shouxin WU, Xingran WANG.Numerical simulation of shear band localization in geotechnical materials based on a nonlocal plasticity model[J]  JMT, 2011,V19(3): 186-198
http://jmt.swjtu.edu.cn/EN/10.3969/j.issn.2095-087X.2011.03.007      or     http://jmt.swjtu.edu.cn/EN/Y2011/V19/I3/186
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