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Article: Micro-scale modeling of anisotropy effects on undrained behavior of granular soils

TitleMicro-scale modeling of anisotropy effects on undrained behavior of granular soils
Authors
Issue Date2013
Citation
Granular Matter, 2013, v. 15 n. 5, p. 557-572 How to Cite?
AbstractThis paper presents a micro-scale modeling of fabric anisotropy effects on the mechanical behavior of granular assembly under undrained conditions using discrete element method. The initial fabrics of the numerical samples engendered from the deposition under gravity are measured, quantified and compared, where the gravitational field can be applied in different directions to generate varying anisotropy orientations. The samples are sheared under undrained biaxial compression, and identical testing conditions are applied, with samples having nearly the same anisotropy intensities, but with different anisotropy directions. The macroscopic behaviors are discussed for the samples, such as the dilatancy characteristics and responses at the critical state. And the associated microstructure changes are further examined, in terms of the variables in the particulate scale, with the focus on the fabric evolution up to a large deformation reaching the critical state. The numerical analysis results compare reasonably well with available experimental data. It is also observed that at critical state, in addition to the requirements by classical critical state theory, a unique fabric structure has also been developed, and might be independent of its initial fabric. This observation is coincided with the recent theoretical achievement of anisotropic critical state theory. Finally, a general framework is introduced for quantifying and modeling the anisotropy effects. © 2013 Springer-Verlag Berlin Heidelberg.
Persistent Identifierhttp://hdl.handle.net/10722/202665
ISSN
2015 Impact Factor: 1.74
2015 SCImago Journal Rankings: 1.033
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYang, Zen_US
dc.contributor.authorYang, Jen_US
dc.contributor.authorWang, Len_US
dc.date.accessioned2014-09-19T09:14:13Z-
dc.date.available2014-09-19T09:14:13Z-
dc.date.issued2013en_US
dc.identifier.citationGranular Matter, 2013, v. 15 n. 5, p. 557-572en_US
dc.identifier.issn14345021-
dc.identifier.urihttp://hdl.handle.net/10722/202665-
dc.description.abstractThis paper presents a micro-scale modeling of fabric anisotropy effects on the mechanical behavior of granular assembly under undrained conditions using discrete element method. The initial fabrics of the numerical samples engendered from the deposition under gravity are measured, quantified and compared, where the gravitational field can be applied in different directions to generate varying anisotropy orientations. The samples are sheared under undrained biaxial compression, and identical testing conditions are applied, with samples having nearly the same anisotropy intensities, but with different anisotropy directions. The macroscopic behaviors are discussed for the samples, such as the dilatancy characteristics and responses at the critical state. And the associated microstructure changes are further examined, in terms of the variables in the particulate scale, with the focus on the fabric evolution up to a large deformation reaching the critical state. The numerical analysis results compare reasonably well with available experimental data. It is also observed that at critical state, in addition to the requirements by classical critical state theory, a unique fabric structure has also been developed, and might be independent of its initial fabric. This observation is coincided with the recent theoretical achievement of anisotropic critical state theory. Finally, a general framework is introduced for quantifying and modeling the anisotropy effects. © 2013 Springer-Verlag Berlin Heidelberg.-
dc.languageengen_US
dc.relation.ispartofGranular Matteren_US
dc.titleMicro-scale modeling of anisotropy effects on undrained behavior of granular soilsen_US
dc.typeArticleen_US
dc.identifier.emailYang, J: junyang@hkucc.hku.hken_US
dc.identifier.authorityYang, J=rp00201en_US
dc.identifier.doi10.1007/s10035-013-0429-5-
dc.identifier.scopuseid_2-s2.0-84885427639-
dc.identifier.hkuros236352en_US
dc.identifier.volume15en_US
dc.identifier.issue5en_US
dc.identifier.spage557en_US
dc.identifier.epage572en_US
dc.identifier.isiWOS:000324780300005-

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