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Article: Effect of particle grading on the response of an idealized granular assemblage

TitleEffect of particle grading on the response of an idealized granular assemblage
Authors
KeywordsConstitutive models
Dilatancy
Discrete elements
Particle size distribution
Stress strain relations
Triaxial tests
Issue Date2011
PublisherAmerican Society of Civil Engineers. The Journal's web site is located at http://ascelibrary.aip.org/gmo/
Citation
International Journal Of Geomechanics, 2011, v. 11 n. 4, p. 276-285 How to Cite?
AbstractThe effects of particle-size distribution on a granular assemblage's mechanical response were studied through a series of numerical triaxial tests using the three-dimensional (3D) discrete-element method. An assemblage was formed by spherical particles of various sizes. A simple linear contact model was adopted with the crucial consideration of varying contact stiffness with particle diameter. Numerical triaxial tests were mimicked by imposing axial compression under constant lateral pressure and constant volume condition, respectively. It was found that an assemblage with a wider particle grading gives more contractive response and behaves toward strain hardening upon shearing. Its critical state locates at a lower position in a void ratio versus mean normal stress plot. Nevertheless, no obvious difference in the critical stress ratio was shown. Model constants in a simple but efficient phenomenologically based granular material model within the framework of critical-state soil mechanics were calibrated from the numerical test results. Results show that some model constants exhibit linear variation with the coefficient of uniformity whereas others are almost independent of particle grading. This investigation provides an opportunity to better understand the implications and meanings of model constants in a phenomenologically based model from the microscale perspective. © 2011 American Society of Civil Engineers.
Persistent Identifierhttp://hdl.handle.net/10722/137258
ISSN
2015 Impact Factor: 1.387
2015 SCImago Journal Rankings: 1.762
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorYan, WMen_HK
dc.contributor.authorDong, Jen_HK
dc.date.accessioned2011-08-26T14:21:49Z-
dc.date.available2011-08-26T14:21:49Z-
dc.date.issued2011en_HK
dc.identifier.citationInternational Journal Of Geomechanics, 2011, v. 11 n. 4, p. 276-285en_HK
dc.identifier.issn1532-3641en_HK
dc.identifier.urihttp://hdl.handle.net/10722/137258-
dc.description.abstractThe effects of particle-size distribution on a granular assemblage's mechanical response were studied through a series of numerical triaxial tests using the three-dimensional (3D) discrete-element method. An assemblage was formed by spherical particles of various sizes. A simple linear contact model was adopted with the crucial consideration of varying contact stiffness with particle diameter. Numerical triaxial tests were mimicked by imposing axial compression under constant lateral pressure and constant volume condition, respectively. It was found that an assemblage with a wider particle grading gives more contractive response and behaves toward strain hardening upon shearing. Its critical state locates at a lower position in a void ratio versus mean normal stress plot. Nevertheless, no obvious difference in the critical stress ratio was shown. Model constants in a simple but efficient phenomenologically based granular material model within the framework of critical-state soil mechanics were calibrated from the numerical test results. Results show that some model constants exhibit linear variation with the coefficient of uniformity whereas others are almost independent of particle grading. This investigation provides an opportunity to better understand the implications and meanings of model constants in a phenomenologically based model from the microscale perspective. © 2011 American Society of Civil Engineers.en_HK
dc.languageengen_US
dc.publisherAmerican Society of Civil Engineers. The Journal's web site is located at http://ascelibrary.aip.org/gmo/en_HK
dc.relation.ispartofInternational Journal of Geomechanicsen_HK
dc.subjectConstitutive modelsen_HK
dc.subjectDilatancyen_HK
dc.subjectDiscrete elementsen_HK
dc.subjectParticle size distributionen_HK
dc.subjectStress strain relationsen_HK
dc.subjectTriaxial testsen_HK
dc.titleEffect of particle grading on the response of an idealized granular assemblageen_HK
dc.typeArticleen_HK
dc.identifier.emailYan, WM:ryanyan@hku.hken_HK
dc.identifier.authorityYan, WM=rp01400en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1061/(ASCE)GM.1943-5622.0000085en_HK
dc.identifier.scopuseid_2-s2.0-79961068849en_HK
dc.identifier.hkuros191382en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79961068849&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume11en_HK
dc.identifier.issue4en_HK
dc.identifier.spage276en_HK
dc.identifier.epage285en_HK
dc.identifier.eissn1943-5622-
dc.identifier.isiWOS:000208699500002-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridYan, WM=35369531200en_HK
dc.identifier.scopusauthoridDong, J=48461389000en_HK

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