Discrete modelling results of a direct shear test for granular materials versus FE results

Kozicki, J., Niedostatkiewicz, M., Tejchman, J. and Muhlhaus, H.-B. (2013) Discrete modelling results of a direct shear test for granular materials versus FE results. Granular Matter, 15 5: 607-627. doi:10.1007/s10035-013-0423-y


Author Kozicki, J.
Niedostatkiewicz, M.
Tejchman, J.
Muhlhaus, H.-B.
Title Discrete modelling results of a direct shear test for granular materials versus FE results
Journal name Granular Matter   Check publisher's open access policy
ISSN 1434-5021
1434-7636
Publication date 2013-01-01
Sub-type Article (original research)
DOI 10.1007/s10035-013-0423-y
Open Access Status
Volume 15
Issue 5
Start page 607
End page 627
Total pages 21
Place of publication Heidelberg, Germany
Publisher Springer
Abstract The intention of this paper is to present a comparison of the results of discrete element and finite element simulations of a simple shear test for medium dense cohesionless sand. Such a comparison may provide useful information on the limitations and possible advantages of micro-polar continuum models for granular media as compared with discrete element models. To simulate the discrete nature of sand at the micro-level during shearing, the 3D discrete open-source model YADE developed at Grenoble University was used. Contact moments at spheres were assumed to capture the influence of force eccentricities due to grain roughness. Attention was paid to some micro-structural events (such as vortices, force chains, vortex structures, local void ratio fluctuations) appearing in a shear zone and kinetic, elastic and dissipated energies in granular specimen. The results of the discrete element simulations were compared with the corresponding finite element (FE) solutions based on a micro-polar hypoplastic constitutive model for granular material. A satisfactory agreement between discrete and FE results was achieved. Advantages and disadvantages of both approaches are outlined.
Keyword Direct shear test
Discrete element method
Finite element method
Micro-polar hypoplasticity
Sand
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
Official 2014 Collection
 
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