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Numerical study of localization in soil systems

Kristensson, Ola LU and Ahadi, Aylin LU (2005) In Computers and Geotechnics 32(8). p.600-612
Abstract
A numerical study of the mechanical behavior of heterogeneous soil systems, consisting of a bulk of sand with embedded stiff gravel inclusions or soft clay inclusions, is performed. A solution scheme using parallel computing is employed when analyzing two different categories of problems. First, a homogenization problem is studied, where use of a single representative volume element subjected to plane strain compression offers the possibility to investigate the coupling between the response at a local scale and at a global scale. Second, a plane strain footing problem with different heterogeneous soil systems is analyzed using a traditional finite element formulation. The material model utilized for the soil is a large deformation... (More)
A numerical study of the mechanical behavior of heterogeneous soil systems, consisting of a bulk of sand with embedded stiff gravel inclusions or soft clay inclusions, is performed. A solution scheme using parallel computing is employed when analyzing two different categories of problems. First, a homogenization problem is studied, where use of a single representative volume element subjected to plane strain compression offers the possibility to investigate the coupling between the response at a local scale and at a global scale. Second, a plane strain footing problem with different heterogeneous soil systems is analyzed using a traditional finite element formulation. The material model utilized for the soil is a large deformation formulation of non-associated elasto-plasticity with an isotropic hardening law, able to represent dilation. It was found that the shape of the gravel or clay inclusions in the systems had no significant effect on the global responses, whereas the strain localizations in the two different soil systems, sand-gravel and sand-clay, were found to have different character. The effect of the initial density on the response was clearly observed in the localization patterns. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
RVE, finite, homogenization, element analysis, soil, localization, elasto-plasticity
in
Computers and Geotechnics
volume
32
issue
8
pages
600 - 612
publisher
Elsevier
external identifiers
  • wos:000236322600005
  • scopus:32644451728
ISSN
0266-352X
DOI
10.1016/j.compgeo.2005.12.001
language
English
LU publication?
yes
id
4bb22d55-c8d4-4d7a-b8f2-cbcbcb3496d0 (old id 208510)
date added to LUP
2007-08-20 13:08:21
date last changed
2017-01-01 04:43:09
@article{4bb22d55-c8d4-4d7a-b8f2-cbcbcb3496d0,
  abstract     = {A numerical study of the mechanical behavior of heterogeneous soil systems, consisting of a bulk of sand with embedded stiff gravel inclusions or soft clay inclusions, is performed. A solution scheme using parallel computing is employed when analyzing two different categories of problems. First, a homogenization problem is studied, where use of a single representative volume element subjected to plane strain compression offers the possibility to investigate the coupling between the response at a local scale and at a global scale. Second, a plane strain footing problem with different heterogeneous soil systems is analyzed using a traditional finite element formulation. The material model utilized for the soil is a large deformation formulation of non-associated elasto-plasticity with an isotropic hardening law, able to represent dilation. It was found that the shape of the gravel or clay inclusions in the systems had no significant effect on the global responses, whereas the strain localizations in the two different soil systems, sand-gravel and sand-clay, were found to have different character. The effect of the initial density on the response was clearly observed in the localization patterns.},
  author       = {Kristensson, Ola and Ahadi, Aylin},
  issn         = {0266-352X},
  keyword      = {RVE,finite,homogenization,element analysis,soil,localization,elasto-plasticity},
  language     = {eng},
  number       = {8},
  pages        = {600--612},
  publisher    = {Elsevier},
  series       = {Computers and Geotechnics},
  title        = {Numerical study of localization in soil systems},
  url          = {http://dx.doi.org/10.1016/j.compgeo.2005.12.001},
  volume       = {32},
  year         = {2005},
}