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Article: Shear strength of assemblies of frictionless particles
Title | Shear strength of assemblies of frictionless particles |
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Authors | |
Keywords | Damping Energy dissipation Friction angle Granular material Shear strength |
Issue Date | 2017 |
Publisher | American Society of Civil Engineers. The Journal's web site is located at http://ascelibrary.aip.org/gmo/ |
Citation | International Journal of Geomechanics, 2017, v. 17 n. 11, article no. 04017102 How to Cite? |
Abstract | Whether a granular assembly of frictionless particles has shear strength is a very interesting but not well-understood question. This study addressed this question using discrete element method (DEM) simulations along with an energy-based analysis. It is shown that the use of artificial damping in DEM simulations leads to a frictionless assembly exhibiting normal quasi-static shear behavior, with the overall angle of friction at the critical state being nonzero. However, when this artificial damping is absent, the frictionless assembly cannot achieve a quasistatic state but rather exhibits a stress oscillating state, with all particles in vibration, and the shear strength is expected to be zero. From an energy perspective, it is shown that the artificial damping used in DEM simulations plays the sole role in energy dissipation for the frictionless assembly and that it facilitates the establishment of a quasi-static state from which shear strength is mobilized. Therefore, the nonzero angle of shear resistance reported in the literature for frictionless granular assemblies under quasi-static shear should be regarded as a false rather than a true strength parameter. |
Persistent Identifier | http://hdl.handle.net/10722/259175 |
ISSN | 2021 Impact Factor: 3.918 2020 SCImago Journal Rankings: 1.635 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Dai, B | - |
dc.contributor.author | Yang, J | - |
dc.date.accessioned | 2018-09-03T04:02:43Z | - |
dc.date.available | 2018-09-03T04:02:43Z | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | International Journal of Geomechanics, 2017, v. 17 n. 11, article no. 04017102 | - |
dc.identifier.issn | 1532-3641 | - |
dc.identifier.uri | http://hdl.handle.net/10722/259175 | - |
dc.description.abstract | Whether a granular assembly of frictionless particles has shear strength is a very interesting but not well-understood question. This study addressed this question using discrete element method (DEM) simulations along with an energy-based analysis. It is shown that the use of artificial damping in DEM simulations leads to a frictionless assembly exhibiting normal quasi-static shear behavior, with the overall angle of friction at the critical state being nonzero. However, when this artificial damping is absent, the frictionless assembly cannot achieve a quasistatic state but rather exhibits a stress oscillating state, with all particles in vibration, and the shear strength is expected to be zero. From an energy perspective, it is shown that the artificial damping used in DEM simulations plays the sole role in energy dissipation for the frictionless assembly and that it facilitates the establishment of a quasi-static state from which shear strength is mobilized. Therefore, the nonzero angle of shear resistance reported in the literature for frictionless granular assemblies under quasi-static shear should be regarded as a false rather than a true strength parameter. | - |
dc.language | eng | - |
dc.publisher | American Society of Civil Engineers. The Journal's web site is located at http://ascelibrary.aip.org/gmo/ | - |
dc.relation.ispartof | International Journal of Geomechanics | - |
dc.rights | International Journal of Geomechanics. Copyright © American Society of Civil Engineers. | - |
dc.subject | Damping | - |
dc.subject | Energy dissipation | - |
dc.subject | Friction angle | - |
dc.subject | Granular material | - |
dc.subject | Shear strength | - |
dc.title | Shear strength of assemblies of frictionless particles | - |
dc.type | Article | - |
dc.identifier.email | Yang, J: junyang@hkucc.hku.hk | - |
dc.identifier.authority | Yang, J=rp00201 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1061/(ASCE)GM.1943-5622.0001005 | - |
dc.identifier.scopus | eid_2-s2.0-85029142510 | - |
dc.identifier.hkuros | 287831 | - |
dc.identifier.volume | 17 | - |
dc.identifier.issue | 11 | - |
dc.identifier.spage | article no. 04017102 | - |
dc.identifier.epage | article no. 04017102 | - |
dc.identifier.isi | WOS:000417684800014 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 1532-3641 | - |