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Microanalysis of smooth Geomembrane–Sand interface using FDM–DEM coupling simulation
Chen, Wei-Bin; Xu, Tao; Zhou, Wan-Huan
2021-02
Source PublicationGEOTEXTILES AND GEOMEMBRANES
ISSN0266-1144
Volume49Issue:1Pages:276-288
Abstract

Very limited attention was paid on the micro–response of sand as it interacts with geomembrane and the effect of surface hardness on the interaction at the microscopic level. In this study, a coupled finite difference–discrete model was adopted with which to analyze the shear behavior of sand–smooth geomembrane interface. The model was validated using published experimental data. The numerical results show that the effects of normal stress and surface hardness on the interface strength depend on the shear mechanism (sliding or plowing) at the interface. There exists a critical normal stress at which the mechanism transforms from predominant sliding to predominant plowing. There is a high level of coupling effect between normal stress and surface hardness on the interface strength. Micro–topographical analysis of geomembrane provides clear insights into the shear mechanism at the interface, supporting the results obtained from interface shear tests. No shear band is formed during shearing for a sand–smooth geomembrane interface. The shear resistance of sand–smooth geomembrane interface relies on interface indentations and characteristics rather than on the formation of shear band.

KeywordGeosynthetics Sand–smooth Geomembrane Interface Coupled Finite Difference–discrete Element Shear Mechanism Microscopic Analysis
DOI10.1016/j.geotexmem.2020.10.022
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering ; Geology
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000602576600002
PublisherELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Scopus ID2-s2.0-85097048130
Fulltext Access
FWCI1.6167109
Citation statistics
Document TypeJournal article
CollectionFaculty of Science and Technology
THE STATE KEY LABORATORY OF INTERNET OF THINGS FOR SMART CITY (UNIVERSITY OF MACAU)
DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Corresponding AuthorZhou, Wan-Huan
AffiliationState Key Laboratory of Internet of Things for Smart City and Department of Civil and Environmental Engineering,University of Macau,Macau,China
First Author AffilicationUniversity of Macau
Corresponding Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Chen, Wei-Bin,Xu, Tao,Zhou, Wan-Huan. Microanalysis of smooth Geomembrane–Sand interface using FDM–DEM coupling simulation[J]. GEOTEXTILES AND GEOMEMBRANES,2021,49(1):276-288.
APA Chen, Wei-Bin,Xu, Tao,&Zhou, Wan-Huan.(2021).Microanalysis of smooth Geomembrane–Sand interface using FDM–DEM coupling simulation.GEOTEXTILES AND GEOMEMBRANES,49(1),276-288.
MLA Chen, Wei-Bin,et al."Microanalysis of smooth Geomembrane–Sand interface using FDM–DEM coupling simulation".GEOTEXTILES AND GEOMEMBRANES 49.1(2021):276-288.
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