Micromechanical aspects of granular ratcheting

Alonso-Marroquin, Fernando, Galindo-Torres, Sergio-Andres and Wang, Yucang (2009). Micromechanical aspects of granular ratcheting. In: Nakagawa, M. and Luding, S, Powders and Grains 2009. 6th International Conference on the Micromechanics of Granular Media, Golden, Colorado, United States, (557-560). 13-17 July 2009. doi:10.1063/1.3179986

Author Alonso-Marroquin, Fernando
Galindo-Torres, Sergio-Andres
Wang, Yucang
Title of paper Micromechanical aspects of granular ratcheting
Conference name 6th International Conference on the Micromechanics of Granular Media
Conference location Golden, Colorado, United States
Conference dates 13-17 July 2009
Proceedings title Powders and Grains 2009   Check publisher's open access policy
Journal name Powders and Grains 2009   Check publisher's open access policy
Place of Publication College Park, MD, United States
Publisher Springer New York LLC
Publication Year 2009
Sub-type Fully published paper
DOI 10.1063/1.3179986
ISBN 9780735406827
ISSN 0094-243X
Editor Nakagawa, M.
Luding, S
Volume 1145
Start page 557
End page 560
Total pages 4
Language eng
Abstract/Summary The existence of granular ratcheting as a long-time behavior in granular materials is still under discussion in the scientific and engineering community. This behavior refers to the constant accumulation of permanent deformation per cycle, when the granular sample is subjected to loading-unloading stress cycles with amplitudes well bellow the yield limit. Ratcheting regimes are observed in both numerical and physical experiments. There is no controversy about the existence of ratcheting when the stress amplitudes reach the yield criterion. However, it is not clear whether this effect persists for loading amplitudes well bellow the yield limit, or whether there is a certain regime where no accumulation of deformation occurs. Early numerical simulations suggested that ratcheting may persist for extremely small loading amplitudes (Alonso-Marroquin and H. J. Herrmann, Rev. Lett. 92 5 (2004) 054301). More recent investigations drive to the conclusion that ratcheting at low stress amplitudes may be strongly influenced by the selection of the contact force (McNamara et al. Phys. Rev. E 77 (3) (2008) 31304). Here we present a numerical investigation of the dependence of granular ratcheting on contact force in a packing of spheres using the Cundall-Strack model and the McNamara correction to the contact force. We conclude that ratcheting for spherical particles is strongly influenced by the McNamara correction. The question of the existence of genuine ratcheting for small cycles for non-spherical particles is still unsolved.
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Collection: School of Civil Engineering Publications
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Created: Tue, 22 Mar 2011, 15:36:39 EST by Jeannette Watson on behalf of School of Civil Engineering