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Discrete element modelling of flexible membrane boundaries for triaxial tests

Tongming Qu, Y.T. Feng, Yong Wang, Min Wang, Yuntian Feng Orcid Logo

Computers and Geotechnics, Volume: 115, Start page: 103154

Swansea University Author: Yuntian Feng Orcid Logo

Abstract

The discrete element modelling of triaxial tests plays a critical role in unveiling fundamental properties of particulate materials, but the numerical implementation of a flexible membrane boundary for the testing still imposes problems. In this study, a robust algorithm was proposed to reproduce a...

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Published in: Computers and Geotechnics
ISSN: 0266-352X
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa50971
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first_indexed 2019-07-01T14:57:17Z
last_indexed 2019-07-25T17:46:59Z
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spelling 2019-07-25T09:42:51.0624716 v2 50971 2019-07-01 Discrete element modelling of flexible membrane boundaries for triaxial tests d66794f9c1357969a5badf654f960275 0000-0002-6396-8698 Yuntian Feng Yuntian Feng true false 2019-07-01 CIVL The discrete element modelling of triaxial tests plays a critical role in unveiling fundamental properties of particulate materials, but the numerical implementation of a flexible membrane boundary for the testing still imposes problems. In this study, a robust algorithm was proposed to reproduce a flexible membrane boundary in triaxial testing. The equivalence of strain energy enables the particle-scale parameters representing the flexible membrane to be directly determined from the real geometric and material parameters of the membrane. Then the proposed flexible membrane boundary was implemented in the context of discrete element simulation of triaxial testing and was validated with laboratory experiments. Furthermore, comparisons of triaxial tests with flexible and rigid boundaries were performed from macro-scale to meso-scale. The results show that the boundary condition has limited influences on the stress-strain behaviour but a relatively large impact on the volumetric change, the failure mode, the distribution of contact forces, and the fabric evolution of particles in the specimen during triaxial testing. Journal Article Computers and Geotechnics 115 103154 0266-352X DEM, Triaxial test, sFlexible membrane boundary, Strain energy, Shear band, Fabric evolution 30 11 2019 2019-11-30 10.1016/j.compgeo.2019.103154 COLLEGE NANME Civil Engineering COLLEGE CODE CIVL Swansea University 2019-07-25T09:42:51.0624716 2019-07-01T09:37:26.7919676 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering Tongming Qu 1 Y.T. Feng 2 Yong Wang 3 Min Wang 4 Yuntian Feng 0000-0002-6396-8698 5 0050971-01072019093913.pdf qu2019.pdf 2019-07-01T09:39:13.1700000 Output 2167908 application/pdf Accepted Manuscript true 2020-07-19T00:00:00.0000000 true eng
title Discrete element modelling of flexible membrane boundaries for triaxial tests
spellingShingle Discrete element modelling of flexible membrane boundaries for triaxial tests
Yuntian Feng
title_short Discrete element modelling of flexible membrane boundaries for triaxial tests
title_full Discrete element modelling of flexible membrane boundaries for triaxial tests
title_fullStr Discrete element modelling of flexible membrane boundaries for triaxial tests
title_full_unstemmed Discrete element modelling of flexible membrane boundaries for triaxial tests
title_sort Discrete element modelling of flexible membrane boundaries for triaxial tests
author_id_str_mv d66794f9c1357969a5badf654f960275
author_id_fullname_str_mv d66794f9c1357969a5badf654f960275_***_Yuntian Feng
author Yuntian Feng
author2 Tongming Qu
Y.T. Feng
Yong Wang
Min Wang
Yuntian Feng
format Journal article
container_title Computers and Geotechnics
container_volume 115
container_start_page 103154
publishDate 2019
institution Swansea University
issn 0266-352X
doi_str_mv 10.1016/j.compgeo.2019.103154
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering
document_store_str 1
active_str 0
description The discrete element modelling of triaxial tests plays a critical role in unveiling fundamental properties of particulate materials, but the numerical implementation of a flexible membrane boundary for the testing still imposes problems. In this study, a robust algorithm was proposed to reproduce a flexible membrane boundary in triaxial testing. The equivalence of strain energy enables the particle-scale parameters representing the flexible membrane to be directly determined from the real geometric and material parameters of the membrane. Then the proposed flexible membrane boundary was implemented in the context of discrete element simulation of triaxial testing and was validated with laboratory experiments. Furthermore, comparisons of triaxial tests with flexible and rigid boundaries were performed from macro-scale to meso-scale. The results show that the boundary condition has limited influences on the stress-strain behaviour but a relatively large impact on the volumetric change, the failure mode, the distribution of contact forces, and the fabric evolution of particles in the specimen during triaxial testing.
published_date 2019-11-30T03:59:32Z
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score 10.930179