The unified sand model and 3D numerical implementation

被引：0
|
作者：
Wang Z.-J. [1 ,2 ]
Zhao B.-M. [1 ,2 ]
机构：
[1] Key Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing
[2] School of Civil Engineering, Beijing Jiaotong University, Beijing
来源：
Gongcheng Lixue/Engineering Mechanics | 2021年 / 38卷 / 10期
关键词：
ABAQUS; Constitutive model; Critical state; Generalized plasticity; Sand; Secondary development;
D O I：
10.6052/j.issn.1000-4750.2020.10.0728
中图分类号：
学科分类号：
摘要：
Based on the generalized plasticity theory and critical state concept, a three-dimensional constitutive model for unified modelling of sand behavior is proposed with a set of material parameters. By the User-defined Material (UMAT) subroutine interface in ABAQUS, the constitutive model of sand is developed and compiled with Fortran. The comparison between the simulations and experimental results of three kinds of sand, i.e., the Toyoura sand, the Fuji River sand and the Tokachi sand, shows that the finite element method could effectively simulate the stress-strain curve over a large range of confining pressures and initial densities. Therefore, the model can better reflect the deformation and strength characteristics of soil under a three-dimensional stress state, where the phenomenon that loose sand contracts while dense sand dilates under shearing is well described. The research can be further applied to numerical analyses related to geotechnical engineering to provide more efficient and practical solutions. © 2021, Engineering Mechanics Press. All right reserved.
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页码：181 / 187and247
相关论文
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