The shear and tensile strength of unsaturated soils by a grain-scale investigation

Cai, G; He, X; Dong, L; Liu, S; Xu, Z; Zhao, C; Sheng, D

The shear and tensile strength of unsaturated soils by a grain-scale investigation

Cai, G He, X

Dong, L Liu, S Xu, Z Zhao, C Sheng, D

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Publisher:: SPRINGER
Publication Type:: Journal Article
Citation:: Granular Matter, 2020, 22, (1)
Issue Date:: 2020-02-01

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Field	Value	Language
dc.contributor.author	Cai, G
dc.contributor.author	He, X https://orcid.org/0000-0001-5336-3663
dc.contributor.author	Dong, L
dc.contributor.author	Liu, S
dc.contributor.author	Xu, Z
dc.contributor.author	Zhao, C
dc.contributor.author	Sheng, D https://orcid.org/0000-0002-1665-6931
dc.date.accessioned	2021-03-05T01:21:55Z
dc.date.available	2021-03-05T01:21:55Z
dc.date.issued	2020-02-01
dc.identifier.citation	Granular Matter, 2020, 22, (1)
dc.identifier.issn	1434-5021
dc.identifier.issn	1434-7636
dc.identifier.uri	http://hdl.handle.net/10453/146794
dc.description.abstract	© 2019, Springer-Verlag GmbH Germany, part of Springer Nature. This paper presents a study of the tensile strength of unsaturated soil by a DEM model in a novel uniaxial tensile test device. For validation and comparison, traditional triaxial shear test of unsaturated soil are also conducted. In the DEM model, the capillary effects and some other cementation effects are modelled by a bond, whose strength is a function of the moisture content and void ratio in uniaxial tensile tests and also the confining pressure in triaxial tests. To compare the DEM simulations with experiments, the bond strength function is calibrated through a quantity measurable in both laboratory and DEM simulations such as the shear strength in triaxial tests or the uniaxial tensile strength in uniaxial tensile tests. The comparison shows that the proposed model is able to capture the phenomena observed in experiments. Most importantly, through investigation of the grain-scale data such as the motion, force chains and development of fractures, it is possible to explain some macroscopic observations such as the form of shear bands in the sample, the influence of the moisture content on the shear and tensile strength, etc.
dc.language	English
dc.publisher	SPRINGER
dc.relation.ispartof	Granular Matter
dc.relation.isbasedon	10.1007/s10035-019-0969-4
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0904 Chemical Engineering, 0905 Civil Engineering, 0913 Mechanical Engineering
dc.subject.classification	Fluids & Plasmas
dc.title	The shear and tensile strength of unsaturated soils by a grain-scale investigation
dc.type	Journal Article
utslib.citation.volume	22
utslib.for	0904 Chemical Engineering
utslib.for	0905 Civil Engineering
utslib.for	0913 Mechanical 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	*
pubs.consider-herdc	false
dc.date.updated	2021-03-05T01:21:52Z
pubs.issue	1
pubs.publication-status	Published
pubs.volume	22
utslib.citation.issue	1

Abstract:

© 2019, Springer-Verlag GmbH Germany, part of Springer Nature. This paper presents a study of the tensile strength of unsaturated soil by a DEM model in a novel uniaxial tensile test device. For validation and comparison, traditional triaxial shear test of unsaturated soil are also conducted. In the DEM model, the capillary effects and some other cementation effects are modelled by a bond, whose strength is a function of the moisture content and void ratio in uniaxial tensile tests and also the confining pressure in triaxial tests. To compare the DEM simulations with experiments, the bond strength function is calibrated through a quantity measurable in both laboratory and DEM simulations such as the shear strength in triaxial tests or the uniaxial tensile strength in uniaxial tensile tests. The comparison shows that the proposed model is able to capture the phenomena observed in experiments. Most importantly, through investigation of the grain-scale data such as the motion, force chains and development of fractures, it is possible to explain some macroscopic observations such as the form of shear bands in the sample, the influence of the moisture content on the shear and tensile strength, etc.

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http://hdl.handle.net/10453/146794