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Simulation of shear band development in a sand-gravel system

Ahadi, Aylin LU and Kristensson, Ola LU (2003) International Workshop on Prediction and Simulation Methods in Geomechanics
Abstract
A Geomaterial structures always involves local inhomogeneities in the material, which give rise to shear bands in the soil structures. This phenomenon decreases the strength of the material considerable and it is the objective of this paper to study the material behaviour micromechanically or locally and then investigate global responses. The imperfections are introduced in form of stiff gravel particles embedded in the sand. The material model utilized is based on the non-associated elasto-plasticity concept with isotropic hardening law, able to represent dilation. The coupling between the local and global scales is achieved by use of a homogenization technique, in which a Representative Volume Element (RVE) is utilized. Characteristics... (More)
A Geomaterial structures always involves local inhomogeneities in the material, which give rise to shear bands in the soil structures. This phenomenon decreases the strength of the material considerable and it is the objective of this paper to study the material behaviour micromechanically or locally and then investigate global responses. The imperfections are introduced in form of stiff gravel particles embedded in the sand. The material model utilized is based on the non-associated elasto-plasticity concept with isotropic hardening law, able to represent dilation. The coupling between the local and global scales is achieved by use of a homogenization technique, in which a Representative Volume Element (RVE) is utilized. Characteristics such as bearing capacity, development of shear bands, their dependency on the material parameters, initial test conditions and mesh size are studied (Less)
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author
organization
publishing date
type
Contribution to conference
publication status
published
subject
keywords
finite element analysis., elasto-plasticity, localization, RVE, soil
pages
4 pages
conference name
International Workshop on Prediction and Simulation Methods in Geomechanics
language
English
LU publication?
yes
id
9419ed24-a5cc-48fa-8ff3-636b4d85bd49 (old id 635545)
date added to LUP
2008-02-13 10:38:39
date last changed
2016-04-16 10:45:50
@misc{9419ed24-a5cc-48fa-8ff3-636b4d85bd49,
  abstract     = {A Geomaterial structures always involves local inhomogeneities in the material, which give rise to shear bands in the soil structures. This phenomenon decreases the strength of the material considerable and it is the objective of this paper to study the material behaviour micromechanically or locally and then investigate global responses. The imperfections are introduced in form of stiff gravel particles embedded in the sand. The material model utilized is based on the non-associated elasto-plasticity concept with isotropic hardening law, able to represent dilation. The coupling between the local and global scales is achieved by use of a homogenization technique, in which a Representative Volume Element (RVE) is utilized. Characteristics such as bearing capacity, development of shear bands, their dependency on the material parameters, initial test conditions and mesh size are studied},
  author       = {Ahadi, Aylin and Kristensson, Ola},
  keyword      = {finite element analysis.,elasto-plasticity,localization,RVE,soil},
  language     = {eng},
  pages        = {4},
  title        = {Simulation of shear band development in a sand-gravel system},
  year         = {2003},
}