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Article: Numerical study on instability behavior of sand

TitleNumerical study on instability behavior of sand
松砂不穩定行為的數值模擬研究
Authors
KeywordsLoose sand
Instability behavior
Discrete element method
Fabric anisotropy
Microstructure
Issue Date2013
PublisherEditorial Office of Chinese Journal of Geotechnical Engineering (巖土工程學報編輯部). The Journal's web site is located at http://www.cgejournal.com/CN/volumn/home.shtml
Citation
巖土工程學報, 2013, v. 35 n. 9, p. 1737-1745 How to Cite?
Chinese Journal of Geotechnical Engineering, 2013, v. 35 n. 9, p. 1737-1745 How to Cite?
AbstractThe instability behavior and static liquefaction of loose sand are investigated by conducting a series of discrete element method(DEM) simulations in biaxial shear tests.The essential factors affecting the initiation of instability behavior are examined from both macroscopic and microscopic perspectives.The numerical simulation results reveal that the instability behavior of loose sand relies on the initial void ratio and fabric anisotropy as well as confining pressure.It is found that the initiation of instability is generally accompanied by the rotation of principal direction of fabric anisotropy if the loading direction does not coincide with the principal direction of fabric anisotropy which is characterized by normal contact unit.The larger the deviation between these two directions is,the easier the initiation of instability behavior becomes and the more intense particle rearrangements and microstructure reorganizations are expected to be as well.At the instability state,most deviatoric shear loads are carried by normal forces at contacts,and tangential forces merely play a secondary role.
Persistent Identifierhttp://hdl.handle.net/10722/202663
ISSN
2015 SCImago Journal Rankings: 0.781

 

DC FieldValueLanguage
dc.contributor.authorDai, Ben_US
dc.contributor.authorYang, Jen_US
dc.contributor.authorZhou, Cen_US
dc.date.accessioned2014-09-19T09:14:13Z-
dc.date.available2014-09-19T09:14:13Z-
dc.date.issued2013en_US
dc.identifier.citation巖土工程學報, 2013, v. 35 n. 9, p. 1737-1745en_US
dc.identifier.citationChinese Journal of Geotechnical Engineering, 2013, v. 35 n. 9, p. 1737-1745-
dc.identifier.issn1000-4548-
dc.identifier.urihttp://hdl.handle.net/10722/202663-
dc.description.abstractThe instability behavior and static liquefaction of loose sand are investigated by conducting a series of discrete element method(DEM) simulations in biaxial shear tests.The essential factors affecting the initiation of instability behavior are examined from both macroscopic and microscopic perspectives.The numerical simulation results reveal that the instability behavior of loose sand relies on the initial void ratio and fabric anisotropy as well as confining pressure.It is found that the initiation of instability is generally accompanied by the rotation of principal direction of fabric anisotropy if the loading direction does not coincide with the principal direction of fabric anisotropy which is characterized by normal contact unit.The larger the deviation between these two directions is,the easier the initiation of instability behavior becomes and the more intense particle rearrangements and microstructure reorganizations are expected to be as well.At the instability state,most deviatoric shear loads are carried by normal forces at contacts,and tangential forces merely play a secondary role.-
dc.languagechien_US
dc.publisherEditorial Office of Chinese Journal of Geotechnical Engineering (巖土工程學報編輯部). The Journal's web site is located at http://www.cgejournal.com/CN/volumn/home.shtml-
dc.relation.ispartof巖土工程學報en_US
dc.relation.ispartofChinese Journal of Geotechnical Engineering-
dc.subjectLoose sand-
dc.subjectInstability behavior-
dc.subjectDiscrete element method-
dc.subjectFabric anisotropy-
dc.subjectMicrostructure-
dc.titleNumerical study on instability behavior of sanden_US
dc.title松砂不穩定行為的數值模擬研究-
dc.typeArticleen_US
dc.identifier.emailDai, B: daibbing@hku.hken_US
dc.identifier.emailYang, J: junyang@hkucc.hku.hken_US
dc.identifier.authorityYang, J=rp00201en_US
dc.identifier.scopuseid_2-s2.0-84885067067-
dc.identifier.hkuros236348en_US
dc.identifier.volume35en_US
dc.identifier.issue9en_US
dc.identifier.spage1737en_US
dc.identifier.epage1745en_US
dc.publisher.placeChina-

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