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Article: Is the quasi-steady state a real behaviour? A micromechanical perspective

TitleIs the quasi-steady state a real behaviour? A micromechanical perspective
Authors
KeywordsConstitutive relations
Fabric/structure of soils
Sands
Issue Date2011
PublisherThomas Telford (ICE Publishing). The Journal's web site is located at http://www.geotechnique-ice.com
Citation
Geotechnique, 2011, v. 61 n. 2, p. 175-183 How to Cite?
AbstractWhether the so-called quasi-steady state is a real material response is a fundamental yet controversial question in the study of undrained shear behaviour of sand. An attempt is made here to clarify the question from a micromechanical viewpoint by means of a grain-scale modelling technique combined with statistical analyses. The study shows that the quasi-steady state is a real behaviour rather than a test-induced phenomenon; it is a transition state, and can be regarded as the result of spatial rearrangement of discrete particles sheared under the constant-volume condition. The quasi-steady state has distinct features that make it different from the steady state at both the macro scale and micro scale. During the loading process, the average number of contacts per particle decreases with strain until the quasi-steady state emerges, and after that it increases gradually to an approximately constant value at large deformations associated with the steady state. This result suggests that the loss of contacts is most pronounced at the quasi-steady state. The study also shows that the contact normal forces and particle rotations play a major role in the deformation process, whereas the contributions of contact tangential forces and particle sliding appear to be minor.
Persistent Identifierhttp://hdl.handle.net/10722/137250
ISSN
2015 Impact Factor: 2.0
2015 SCImago Journal Rankings: 2.837
ISI Accession Number ID
Funding AgencyGrant Number
University of Hong Kong10208227
Funding Information:

The work was supported by the University of Hong Kong under the Seed Funding for Basic Research scheme (10208227). This support is gratefully acknowledged. The authors also wish to acknowledge the support provided by the University of Hong Kong through the Outstanding Young Researcher Award.

References

 

DC FieldValueLanguage
dc.contributor.authorYang, Jen_HK
dc.contributor.authorDai, BBen_HK
dc.date.accessioned2011-08-26T14:21:46Z-
dc.date.available2011-08-26T14:21:46Z-
dc.date.issued2011en_HK
dc.identifier.citationGeotechnique, 2011, v. 61 n. 2, p. 175-183en_HK
dc.identifier.issn0016-8505en_HK
dc.identifier.urihttp://hdl.handle.net/10722/137250-
dc.description.abstractWhether the so-called quasi-steady state is a real material response is a fundamental yet controversial question in the study of undrained shear behaviour of sand. An attempt is made here to clarify the question from a micromechanical viewpoint by means of a grain-scale modelling technique combined with statistical analyses. The study shows that the quasi-steady state is a real behaviour rather than a test-induced phenomenon; it is a transition state, and can be regarded as the result of spatial rearrangement of discrete particles sheared under the constant-volume condition. The quasi-steady state has distinct features that make it different from the steady state at both the macro scale and micro scale. During the loading process, the average number of contacts per particle decreases with strain until the quasi-steady state emerges, and after that it increases gradually to an approximately constant value at large deformations associated with the steady state. This result suggests that the loss of contacts is most pronounced at the quasi-steady state. The study also shows that the contact normal forces and particle rotations play a major role in the deformation process, whereas the contributions of contact tangential forces and particle sliding appear to be minor.en_HK
dc.languageengen_US
dc.publisherThomas Telford (ICE Publishing). The Journal's web site is located at http://www.geotechnique-ice.comen_HK
dc.relation.ispartofGeotechniqueen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsPermission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees-
dc.subjectConstitutive relationsen_HK
dc.subjectFabric/structure of soilsen_HK
dc.subjectSandsen_HK
dc.titleIs the quasi-steady state a real behaviour? A micromechanical perspectiveen_HK
dc.typeArticleen_HK
dc.identifier.emailYang, J:junyang@hkucc.hku.hken_HK
dc.identifier.authorityYang, J=rp00201en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1680/geot.8.P.129en_HK
dc.identifier.scopuseid_2-s2.0-79551607419en_HK
dc.identifier.hkuros191296en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79551607419&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume61en_HK
dc.identifier.issue2en_HK
dc.identifier.spage175en_HK
dc.identifier.epage183en_HK
dc.identifier.isiWOS:000286589700008-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridYang, J=35605258800en_HK
dc.identifier.scopusauthoridDai, BB=36987437400en_HK

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