An analysis of the strength of anisotropic granular assemblies via discrete methods

Galindo Torres, Sergio, Pedroso, Dorival, Williams, David and Muhlhaus, Hans (2014). An analysis of the strength of anisotropic granular assemblies via discrete methods. In: Advances in Computational Mechanics. 1st Australasian Conference on Computational Mechanics (ACCM2013), Sydney, Australia, (525-530). 3-4 October 2013. doi:10.4028/

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Author Galindo Torres, Sergio
Pedroso, Dorival
Williams, David
Muhlhaus, Hans
Title of paper An analysis of the strength of anisotropic granular assemblies via discrete methods
Conference name 1st Australasian Conference on Computational Mechanics (ACCM2013)
Conference location Sydney, Australia
Conference dates 3-4 October 2013
Proceedings title Advances in Computational Mechanics   Check publisher's open access policy
Journal name Applied Mechanics and Materials   Check publisher's open access policy
Place of Publication Stafa-Zurich, Switzerland
Publisher Trans Tech Publications
Publication Year 2014
Sub-type Fully published paper
DOI 10.4028/
Open Access Status
ISBN 9783038350682
ISSN 1660-9336
Volume 553
Start page 525
End page 530
Total pages 6
Collection year 2015
Language eng
Formatted Abstract/Summary
This paper presents a study on the macroscopic strength characteristics of granular assemblies with three-dimensional complex-shaped particles. Different assemblies are considered, with both isotropic and anisotropic particle geometries. The study is conducted using the Discrete Element Method (DEM), with so-called sphero-polyhedral particles, and simulations of mechanical true triaxial tests for a range of Lode angles and confining pressures. The observed mathematical failure envelopes are investigated in the Haigh-Westergaard stress space, as well as on the deviatoric-mean pressure plane. It is verified that the DEM with non-spherical particles produces results that are qualitatively similar to experimental data and previous numerical results obtained with spherical elements. The simulations reproduce quite well the shear strength of assemblies of granular media, such as higher strength during compression than during extension. In contrast, by introducing anisotropy at the particle level, the shear strength parameters are greatly affected, and an isotropic failure criterion is no longer valid. It is observed that the strength of the anisotropic assembly depends on the direction of loading, as observed for real soils.
Subjects 2200 Engineering
Keyword Discrete element method
Failure criteria
True triaxial test
Anisotropic media
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

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Created: Mon, 23 Jun 2014, 17:30:24 EST by Mr Sergio Galindo Torres on behalf of School of Civil Engineering