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Influence of Particle Rolling and Rotation on the Shearing Response of Clean Sand

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dc.contributor.authorBarnett, N.
dc.contributor.authorRahman, M.M.
dc.contributor.authorKarim, M.R.
dc.contributor.authorNguyen, H.B.K.
dc.contributor.editorMeehan, C.L.
dc.contributor.editorKumar, S.
dc.contributor.editorPando, M.A.
dc.date.issued2019
dc.description.abstractThe discrete element method (DEM) has been extensively used to capture the micro-mechanical behavior of granular materials. To reduce computational expenses and operate within the capabilities of DEM software, many DEM studies adopt idealized rounded particle shapes, which do not truly represent the angularity and surface texture features of sand particles. When in contact, the idealized particles become highly prone to rolling, which can significantly influence the shear behavior observed in DEM. To counteract this manifestation of artificial behavior, contact models embedded with rolling resistance mechanics have been employed in DEM simulations. Here, the angular features of realistic soil particles can be indirectly considered through a rolling resistance coefficient. In this study, the effect of rolling resistance on both macro- and micro-mechanical responses of granular material is examined through undertaking conventional undrained and drained triaxial simulations. The undrained and drained dilative behavior was found to increase with rolling resistance. However, the coordination number (CN) did not reflect this macroscopically observed behavior. Further, the angular velocity of DEM particles was observed throughout undrained shearing, where it was found that particle rotation tendencies can also be associated with dilative or contractive behavior.
dc.identifier.citationEvent/exhibition information: International Conference on Case Histories in Geotechnical Engineering (8th : 2019 : Philadelphia, Pa.), Philadelphia, Pennsylvania, 24/03/2019-27/03/2019 Source details - Title: Geo-Congress 2019. Geotechnical Materials, Modeling, and Testing, 2019 / Meehan, C.L., Kumar, S., Pando, M.A. (ed./s), vol.2019-March, pp.30-39
dc.identifier.doi10.1061/9780784482124.004
dc.identifier.isbn9780784482124
dc.identifier.orcidRahman, M.M. [0000-0002-0638-4055]
dc.identifier.orcidKarim, M.R. [0000-0002-5318-3862]
dc.identifier.orcidNguyen, H.B.K. [0000-0001-7280-9472]
dc.identifier.urihttps://hdl.handle.net/11541.2/136636
dc.language.isoen
dc.publisherAmerican Society of Civil Engineers
dc.publisher.placeUnited States
dc.relation.ispartofseries310, 0895-0563
dc.rightsCopyright 2019 American Society of Civil Engineers
dc.source.urihttps://doi.org/10.1061/9780784482124.004
dc.subjectangular velocity
dc.subjectfinite difference method
dc.subjectgeotechnical engineering
dc.subjectgranular materials
dc.subjectrolling resistance
dc.subjectshearing
dc.subjecttextures
dc.titleInfluence of Particle Rolling and Rotation on the Shearing Response of Clean Sand
dc.typeBook chapter
pubs.publication-statusPublished
ror.mmsid9916272309501831

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