File Download
  Links for fulltext
     (May Require Subscription)
Supplementary

Article: DEM simulations of thermally activated creep in soils

TitleDEM simulations of thermally activated creep in soils
Authors
KeywordsCreep
Numerical modelling
Time dependence
Issue Date2010
PublisherThomas Telford (ICE Publishing). The Journal's web site is located at http://www.geotechnique-ice.com
Citation
Geotechnique, 2010, v. 60 n. 6, p. 425-433 How to Cite?
AbstractDiscrete element modelling (DEM) has been used to simulate creep in assemblies of spherical grains possessing an interfacial coefficient of friction that varies with sliding velocity according to rate process theory. Soil stiffness is represented by a pair of values of linear spring stiffness normal and tangential to each intergranular contact, and the limiting coefficient of contact friction is described as varying linearly with the logarithm of sliding velocity. DEM simulations of an assembly of 3451 spheres reproduce a number of significant phenomena including: creep rate as a function of the mobilisation of deviatoric stress; initially linear decay of creep strain rate with time plotted on log-log axes and with a slope m in the range 20.8 to 21; and ultimate creep failure in triaxial simulations at high deviatoric stress ratios. Creep-induced failure is shown to occur at a unique axial strain for a given state of initial packing, and to be linked with dilatancy. The numerical results are compared quantitatively with the test data of soils from the literature. The effects of activation energy are considered in relation to the different magnitudes of creep encountered in sands and clays.
Persistent Identifierhttp://hdl.handle.net/10722/91232
ISSN
2015 Impact Factor: 2.0
2015 SCImago Journal Rankings: 2.837
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorKwok, CYen_HK
dc.contributor.authorBolton, MDen_HK
dc.date.accessioned2010-09-17T10:15:16Z-
dc.date.available2010-09-17T10:15:16Z-
dc.date.issued2010en_HK
dc.identifier.citationGeotechnique, 2010, v. 60 n. 6, p. 425-433en_HK
dc.identifier.issn0016-8505en_HK
dc.identifier.urihttp://hdl.handle.net/10722/91232-
dc.description.abstractDiscrete element modelling (DEM) has been used to simulate creep in assemblies of spherical grains possessing an interfacial coefficient of friction that varies with sliding velocity according to rate process theory. Soil stiffness is represented by a pair of values of linear spring stiffness normal and tangential to each intergranular contact, and the limiting coefficient of contact friction is described as varying linearly with the logarithm of sliding velocity. DEM simulations of an assembly of 3451 spheres reproduce a number of significant phenomena including: creep rate as a function of the mobilisation of deviatoric stress; initially linear decay of creep strain rate with time plotted on log-log axes and with a slope m in the range 20.8 to 21; and ultimate creep failure in triaxial simulations at high deviatoric stress ratios. Creep-induced failure is shown to occur at a unique axial strain for a given state of initial packing, and to be linked with dilatancy. The numerical results are compared quantitatively with the test data of soils from the literature. The effects of activation energy are considered in relation to the different magnitudes of creep encountered in sands and clays.en_HK
dc.languageengen_HK
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.subjectCreepen_HK
dc.subjectNumerical modellingen_HK
dc.subjectTime dependenceen_HK
dc.titleDEM simulations of thermally activated creep in soilsen_HK
dc.typeArticleen_HK
dc.identifier.emailKwok, CY:fkwok8@hku.hken_HK
dc.identifier.authorityKwok, CY=rp01344en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1680/geot.2010.60.6.425en_HK
dc.identifier.scopuseid_2-s2.0-77953516298en_HK
dc.identifier.hkuros192425-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77953516298&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume60en_HK
dc.identifier.issue6en_HK
dc.identifier.spage425en_HK
dc.identifier.epage433en_HK
dc.identifier.eissn1751-7656-
dc.identifier.isiWOS:000278177100003-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridKwok, CY=36157163300en_HK
dc.identifier.scopusauthoridBolton, MD=7103008614en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats