Rate effects in dense granular materials: Linear stability analysis and the fall of granular columns

Lemiale, V., Muhlhaus, H. B., Meriaux, C., Moresi, L. and Hodkinson, L. (2011) Rate effects in dense granular materials: Linear stability analysis and the fall of granular columns. International Journal For Numerical and Analytical Methods In Geomechanics, 35 2: 293-308. doi:10.1002/nag.895


Author Lemiale, V.
Muhlhaus, H. B.
Meriaux, C.
Moresi, L.
Hodkinson, L.
Title Rate effects in dense granular materials: Linear stability analysis and the fall of granular columns
Journal name International Journal For Numerical and Analytical Methods In Geomechanics   Check publisher's open access policy
ISSN 0363-9061
1096-9853
Publication date 2011-02
Year available 2010
Sub-type Article (original research)
DOI 10.1002/nag.895
Volume 35
Issue 2
Start page 293
End page 308
Total pages 16
Place of publication West Sussex, United Kingdom
Publisher John Wiley & Sons
Collection year 2012
Language eng
Abstract In this paper, the suitability of rate-dependent constitutive relationships to model the rheology of granular materials is investigated. In particular, the formation of shear bands as predicted by this approach is studied. First, a rate-dependent model is investigated in terms of a linear stability analysis. It turns out that at low to moderate strain rates, the orientation of shear bands tends to vary from the so-called Roscoe and Coulomb solutions towards a unique admissible orientation with an increase of the so-called inertial number I. This effect is confirmed by numerical simulations of a compression test performed with a particle in cell finite element program. To further assess the validity of continuum approaches for the simulation of dense granular flows, a quasi-static fall of a granular column is studied numerically and the results are confronted to available experimental data. It is shown that a satisfying agreement is obtained at different aspect ratios and for the two materials investigated in this paper, i.e. sand and glass beads. The results reported in the present paper demonstrate the relevance of continuum approaches in the modelling of dense granular flows.
Keyword Granular columns
Finite element
Shear bands
Linear stability analysis
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article first published online: 11 MAR 2010

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
Earth Systems Science Computational Centre Publications
 
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Created: Sun, 06 Mar 2011, 00:12:16 EST