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FE-Implementation of Elasto-Plastic Model for Granular Materials and Analysis of Foundations

Ahadi, Aylin LU (2002) Fifth World Congress on Computational Mechanics (WCCM V) In Proceedings of the Fifth World Congress on Computational Mechanics (WCCM V), July 7-12, 2002, Vienna, Austria
Abstract
The non-associated plasticity model

is utilized to simulate a three dimensional nonlinear finite

element analysis on sand. The model is a three-dimensional

generalization of the Cam-Clay model with yield- and flow potential

functions expressed in a common format, but with different shapes

and hardening rule depending on both the shear and volumetric

stains, which enables modelling of dilation. The model has been

implemented as a user-defined mechanical material behavior in

ABAQUS finite element code using an implicit integration algorithm

with explicit update of the hardening parameter. The implemented

subroutine UMAT in ABAQUS is verified by carrying... (More)
The non-associated plasticity model

is utilized to simulate a three dimensional nonlinear finite

element analysis on sand. The model is a three-dimensional

generalization of the Cam-Clay model with yield- and flow potential

functions expressed in a common format, but with different shapes

and hardening rule depending on both the shear and volumetric

stains, which enables modelling of dilation. The model has been

implemented as a user-defined mechanical material behavior in

ABAQUS finite element code using an implicit integration algorithm

with explicit update of the hardening parameter. The implemented

subroutine UMAT in ABAQUS is verified by carrying out a triaxial

test on single element and comparing the result to the experimental

data and implementation in the high level language MATLAB. The

implemented subroutine is used to study the influence of the

rigidity of the footing. Simulation with both absolute rigid and

absolute flexible footings are carried out and the deformation

behaviour, the differences in vertical and contact stress

distributions beneath the footing are presented. In addition the

effects of using large strains are investigated by simulating a

flexible strip footing resting on sand and comparing the

deformation behaviour to the small strain solution.} (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
FE-implementation, integration algorithm, granular material, footing analysis
in
Proceedings of the Fifth World Congress on Computational Mechanics (WCCM V), July 7-12, 2002, Vienna, Austria
pages
10 pages
publisher
Proceedings of the Fifth World Congress on Computational Mechanics (WCCM V), July 7-12, 2002, Vienna, Austria
conference name
Fifth World Congress on Computational Mechanics (WCCM V)
ISBN
3-9501554-0-6
language
English
LU publication?
yes
id
fcd8f271-f83e-40a4-96d3-8cf494e1e75d (old id 589467)
date added to LUP
2008-02-13 10:39:34
date last changed
2016-04-16 07:32:31
@misc{fcd8f271-f83e-40a4-96d3-8cf494e1e75d,
  abstract     = {The non-associated plasticity model<br/><br>
is utilized to simulate a three dimensional nonlinear finite<br/><br>
element analysis on sand. The model is a three-dimensional<br/><br>
generalization of the Cam-Clay model with yield- and flow potential<br/><br>
functions expressed in a common format, but with different shapes<br/><br>
and hardening rule depending on both the shear and volumetric<br/><br>
stains, which enables modelling of dilation. The model has been<br/><br>
implemented as a user-defined mechanical material behavior in<br/><br>
ABAQUS finite element code using an implicit integration algorithm<br/><br>
with explicit update of the hardening parameter. The implemented<br/><br>
subroutine UMAT in ABAQUS is verified by carrying out a triaxial<br/><br>
test on single element and comparing the result to the experimental<br/><br>
data and implementation in the high level language MATLAB. The<br/><br>
implemented subroutine is used to study the influence of the<br/><br>
rigidity of the footing. Simulation with both absolute rigid and<br/><br>
absolute flexible footings are carried out and the deformation<br/><br>
behaviour, the differences in vertical and contact stress<br/><br>
distributions beneath the footing are presented. In addition the<br/><br>
effects of using large strains are investigated by simulating a<br/><br>
flexible strip footing resting on sand and comparing the<br/><br>
deformation behaviour to the small strain solution.}},
  author       = {Ahadi, Aylin},
  isbn         = {3-9501554-0-6},
  keyword      = {FE-implementation,integration algorithm,granular material,footing analysis},
  language     = {eng},
  pages        = {10},
  publisher    = {ARRAY(0x79c1298)},
  series       = {Proceedings of the Fifth World Congress on Computational Mechanics (WCCM V), July 7-12, 2002, Vienna, Austria},
  title        = {FE-Implementation of Elasto-Plastic Model for Granular Materials and Analysis of Foundations},
  year         = {2002},
}