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Conference Paper: On the physical meaning of equivalent skeleton void ratio for granular soil with fines

TitleOn the physical meaning of equivalent skeleton void ratio for granular soil with fines
Authors
Issue Date2013
PublisherAmerican Institute of Physics. The Journal's web site is located at http://proceedings.aip.org/
Citation
The 7th International Conference on Micromechanics of Granular Media: Powders and Grains 2013, Sydney, New South Wales, Australia, 8 -12 July 2013. In AIP Conference Proceedings, 2013, v. 1542, p. 257-260 How to Cite?
AbstractRecent research on the behavior of silty sand usually involves the use of equivalent skeleton void ratio to characterize its packing density state. The equivalent skeleton void ratio is a modified void ratio by the introduction of a parameter b to account for the participation of fines in the force chains. However, the parameter b is poorly understood. This paper presents an investigation into the physical meaning of the equivalent skeleton void ratio by conducting a series of discrete element method (DEM) simulations on biaxial tests of assemblies of coarse and fine particles. The simulation results reveal that the parameter b is a state variable dependent on confining pressure, packing density and particle gradation and it varies during shearing. It should not be treated as a constant as reported in the literature. It is also found that the distribution pattern of fine particles in the skeleton of the assembly plays a crucial role in the overall macroscopic response. Contraction is principally induced by the movement of fine particles out of the force chains and dilation is generally involved with the migration of fine particles into forces chains. Furthermore, a new expression of the equivalent skeleton void ratio is put forward with the introduction of the parameter d to take into account the absence of large particles from force chains, along with comparisons between this new definition for the equivalent skeleton void ratio and the existing one. © 2013 AIP Publishing LLC
Persistent Identifierhttp://hdl.handle.net/10722/190253
ISSN
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorDai, Ben_US
dc.contributor.authorYang, Jen_US
dc.date.accessioned2013-09-17T15:16:56Z-
dc.date.available2013-09-17T15:16:56Z-
dc.date.issued2013en_US
dc.identifier.citationThe 7th International Conference on Micromechanics of Granular Media: Powders and Grains 2013, Sydney, New South Wales, Australia, 8 -12 July 2013. In AIP Conference Proceedings, 2013, v. 1542, p. 257-260en_US
dc.identifier.issn0094-243X-
dc.identifier.urihttp://hdl.handle.net/10722/190253-
dc.description.abstractRecent research on the behavior of silty sand usually involves the use of equivalent skeleton void ratio to characterize its packing density state. The equivalent skeleton void ratio is a modified void ratio by the introduction of a parameter b to account for the participation of fines in the force chains. However, the parameter b is poorly understood. This paper presents an investigation into the physical meaning of the equivalent skeleton void ratio by conducting a series of discrete element method (DEM) simulations on biaxial tests of assemblies of coarse and fine particles. The simulation results reveal that the parameter b is a state variable dependent on confining pressure, packing density and particle gradation and it varies during shearing. It should not be treated as a constant as reported in the literature. It is also found that the distribution pattern of fine particles in the skeleton of the assembly plays a crucial role in the overall macroscopic response. Contraction is principally induced by the movement of fine particles out of the force chains and dilation is generally involved with the migration of fine particles into forces chains. Furthermore, a new expression of the equivalent skeleton void ratio is put forward with the introduction of the parameter d to take into account the absence of large particles from force chains, along with comparisons between this new definition for the equivalent skeleton void ratio and the existing one. © 2013 AIP Publishing LLC-
dc.languageengen_US
dc.publisherAmerican Institute of Physics. The Journal's web site is located at http://proceedings.aip.org/-
dc.relation.ispartofAIP Conference Proceedingsen_US
dc.rightsAIP Conference Proceedings. Copyright © American Institute of Physics.-
dc.rightsCopyright (2013) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in AIP Conference Proceedings, 2013, v. 1542, p. 257-260 and may be found at http://dx.doi.org/10.1063/1.4811916.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleOn the physical meaning of equivalent skeleton void ratio for granular soil with finesen_US
dc.typeConference_Paperen_US
dc.identifier.emailDai, B: daibbing@hku.hken_US
dc.identifier.emailYang, J: junyang@hkucc.hku.hken_US
dc.identifier.authorityYang, J=rp00201en_US
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1063/1.4811916-
dc.identifier.scopuseid_2-s2.0-84880709287-
dc.identifier.hkuros221242en_US
dc.identifier.hkuros236363-
dc.identifier.volume1542-
dc.identifier.spage257-
dc.identifier.epage260-
dc.identifier.isiWOS:000321003200059-
dc.publisher.placeUnited States-

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