Influence of a characteristic length on shear zone formation in hypoplasticity with different enhancements

被引：62

作者：

Tejchman, J ^{[1
]}

机构：

[1] Gdansk Univ Technol, Dept Civil Engn, PL-80952 Gdansk, Poland

来源：

COMPUTERS AND GEOTECHNICS | 2004年 / 31卷 / 08期

关键词：

characteristic length; finite element method; non-local model; second-gradient model; plane strain compression; polar model; shear localization; size effect;

D O I：

10.1016/j.compgeo.2004.10.001

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

The paper presents a FE-analysis of a spontaneous shear localization inside of non-cohesive sand during plane strain compression. The calculations were carried out with a hypoplastic constitutive law enhanced by polar, non-local and second-gradient terms to model properly the shear zone formation. The hypoplastic law can reproduce essential features of granular bodies depending on the void ratio, pressure level and deformation direction. Attention was laid on the effect of the regularization technique on the load-displacement curve and shear zone thickness. The calculations were carried out with three different characteristic lengths of microstructure and two different specimen sizes. In addition, the influence of pressure, initial void ratio and boundary conditions along the top and bottom of the granular specimen on the size effect was investigated. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：595 / 611

页数：17

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