A micro-mechanical model for unsaturated soils based on DEM

Liu, X; Zhou, A; Shen, SL; Li, J; Sheng, D

A micro-mechanical model for unsaturated soils based on DEM

Liu, X Zhou, A Shen, SL Li, J Sheng, D

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Publisher:: ELSEVIER SCIENCE SA
Publication Type:: Journal Article
Citation:: Computer Methods in Applied Mechanics and Engineering, 2020, 368
Issue Date:: 2020-08-15

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Field	Value	Language
dc.contributor.author	Liu, X
dc.contributor.author	Zhou, A
dc.contributor.author	Shen, SL
dc.contributor.author	Li, J
dc.contributor.author	Sheng, D https://orcid.org/0000-0002-1665-6931
dc.date.accessioned	2020-10-17T06:53:42Z
dc.date.available	2020-10-17T06:53:42Z
dc.date.issued	2020-08-15
dc.identifier.citation	Computer Methods in Applied Mechanics and Engineering, 2020, 368
dc.identifier.issn	0045-7825
dc.identifier.issn	1879-2138
dc.identifier.uri	http://hdl.handle.net/10453/143330
dc.description.abstract	© 2020 Elsevier B.V. A micro-mechanical model to study the microscopic and macroscopic behavior of unsaturated soils under different suctions is proposed in this study. In the model, a novel pore-scale numerical method for simulating the liquid–solid interfaces is proposed first. A discretization of the particle surface using Fibonacci-Lattice is then introduced to calculate the capillary forces from the complex liquid–solid interfaces. The joint influence of capillary forces and the interparticle contact forces on the motion of the particles are handled by the discrete element method (DEM). The effective stress parameter estimated by the model is compared with the experimental results for unsaturated soils, which confirms the validity of the proposed micro-mechanical model. The microscopic responses (liquid–solid interfaces, capillary forces, contact forces and coordination numbers) and macroscopic responses (strength, stress–strain relationship and volume change) of unsaturated soils in desaturation tests and triaxial tests are studied by the proposed model.
dc.language	English
dc.publisher	ELSEVIER SCIENCE SA
dc.relation	http://purl.org/au-research/grants/arc/IH180100010
dc.relation.ispartof	Computer Methods in Applied Mechanics and Engineering
dc.relation.isbasedon	10.1016/j.cma.2020.113183
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	01 Mathematical Sciences, 09 Engineering
dc.subject.classification	Applied Mathematics
dc.title	A micro-mechanical model for unsaturated soils based on DEM
dc.type	Journal Article
utslib.citation.volume	368
utslib.for	01 Mathematical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
dc.date.updated	2020-10-17T06:53:23Z
pubs.publication-status	Published
pubs.volume	368

Abstract:

© 2020 Elsevier B.V. A micro-mechanical model to study the microscopic and macroscopic behavior of unsaturated soils under different suctions is proposed in this study. In the model, a novel pore-scale numerical method for simulating the liquid–solid interfaces is proposed first. A discretization of the particle surface using Fibonacci-Lattice is then introduced to calculate the capillary forces from the complex liquid–solid interfaces. The joint influence of capillary forces and the interparticle contact forces on the motion of the particles are handled by the discrete element method (DEM). The effective stress parameter estimated by the model is compared with the experimental results for unsaturated soils, which confirms the validity of the proposed micro-mechanical model. The microscopic responses (liquid–solid interfaces, capillary forces, contact forces and coordination numbers) and macroscopic responses (strength, stress–strain relationship and volume change) of unsaturated soils in desaturation tests and triaxial tests are studied by the proposed model.

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http://hdl.handle.net/10453/143330