Exploring the undrained behaviour of granular clumps after isotropic and Ko-consolidation paths using DEM
This paper investigates the undrained behaviour of granular clumps after isotropic and Ko-consolidation paths using a three-dimensional discrete element method (3D-DEM). Four randomly chosen clumped particles with a wide range of densification indexes, ID, and mean confining stresses, p' were c...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Forces in Mechanics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S266635972300077X |
| _version_ | 1797390402531098624 |
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| author | Shiva Prashanth Kumar Kodicherla Minyi Zhu Guobin Gong Stephen Wilkinson |
| author_facet | Shiva Prashanth Kumar Kodicherla Minyi Zhu Guobin Gong Stephen Wilkinson |
| author_sort | Shiva Prashanth Kumar Kodicherla |
| collection | DOAJ |
| description | This paper investigates the undrained behaviour of granular clumps after isotropic and Ko-consolidation paths using a three-dimensional discrete element method (3D-DEM). Four randomly chosen clumped particles with a wide range of densification indexes, ID, and mean confining stresses, p' were considered. The specimens were sheared to the deviatoric strain, εq of 40 % to reach the critical state (CS) conditions. It was found from the results that a unique critical state line (CSL) was achieved, irrespective of consolidation paths. The micro-mechanical quantities such as the average coordination number (CN) and von Mises fabric in terms of the second invariant of deviatoric fabric, FvM, also reached CS values. Irrespective of the consolidation paths, unique relationships were found between e−log(p′)and CN−log(p′). The stress-fabric joint invariant, KF established a unique relationship with p′and e, which forms a relationship in the KF−p′−e space and the projection of this relationship in the e−log(p′) plane confirms the classical CSL. Moreover, the flow potential (uF), stress ratio at instability (ηIS), and average coordination number at instability (CNIS) showed no dependency on the consolidation paths, while a dependency was observed for the second-order deviator fabric, FvM. |
| first_indexed | 2024-03-08T23:10:12Z |
| format | Article |
| id | doaj.art-280b9686b1fc421293a2c0483bacb058 |
| institution | Directory Open Access Journal |
| issn | 2666-3597 |
| language | English |
| last_indexed | 2024-03-08T23:10:12Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Forces in Mechanics |
| spelling | doaj.art-280b9686b1fc421293a2c0483bacb0582023-12-15T07:26:07ZengElsevierForces in Mechanics2666-35972023-12-0113100242Exploring the undrained behaviour of granular clumps after isotropic and Ko-consolidation paths using DEMShiva Prashanth Kumar Kodicherla0Minyi Zhu1Guobin Gong2Stephen Wilkinson3Department of Civil, Mining and Process Engineering, Namibia University of Science and Technology, Windhoek, Namibia; Corresponding author.Department of Civil Engineering, Xi'an Jiaotong – Liverpool University, Suzhou Industrial Park (SIP), Suzhou, PR ChinaDepartment of Civil Engineering, Xi'an Jiaotong – Liverpool University, Suzhou Industrial Park (SIP), Suzhou, PR ChinaSchool of Engineering, University of Wollongong in Dubai, Dubai, United Arab EmiratesThis paper investigates the undrained behaviour of granular clumps after isotropic and Ko-consolidation paths using a three-dimensional discrete element method (3D-DEM). Four randomly chosen clumped particles with a wide range of densification indexes, ID, and mean confining stresses, p' were considered. The specimens were sheared to the deviatoric strain, εq of 40 % to reach the critical state (CS) conditions. It was found from the results that a unique critical state line (CSL) was achieved, irrespective of consolidation paths. The micro-mechanical quantities such as the average coordination number (CN) and von Mises fabric in terms of the second invariant of deviatoric fabric, FvM, also reached CS values. Irrespective of the consolidation paths, unique relationships were found between e−log(p′)and CN−log(p′). The stress-fabric joint invariant, KF established a unique relationship with p′and e, which forms a relationship in the KF−p′−e space and the projection of this relationship in the e−log(p′) plane confirms the classical CSL. Moreover, the flow potential (uF), stress ratio at instability (ηIS), and average coordination number at instability (CNIS) showed no dependency on the consolidation paths, while a dependency was observed for the second-order deviator fabric, FvM.http://www.sciencedirect.com/science/article/pii/S266635972300077XDEMUndrained behaviourConsolidation pathsClumped particlesConstitutive modelling |
| spellingShingle | Shiva Prashanth Kumar Kodicherla Minyi Zhu Guobin Gong Stephen Wilkinson Exploring the undrained behaviour of granular clumps after isotropic and Ko-consolidation paths using DEM Forces in Mechanics DEM Undrained behaviour Consolidation paths Clumped particles Constitutive modelling |
| title | Exploring the undrained behaviour of granular clumps after isotropic and Ko-consolidation paths using DEM |
| title_full | Exploring the undrained behaviour of granular clumps after isotropic and Ko-consolidation paths using DEM |
| title_fullStr | Exploring the undrained behaviour of granular clumps after isotropic and Ko-consolidation paths using DEM |
| title_full_unstemmed | Exploring the undrained behaviour of granular clumps after isotropic and Ko-consolidation paths using DEM |
| title_short | Exploring the undrained behaviour of granular clumps after isotropic and Ko-consolidation paths using DEM |
| title_sort | exploring the undrained behaviour of granular clumps after isotropic and ko consolidation paths using dem |
| topic | DEM Undrained behaviour Consolidation paths Clumped particles Constitutive modelling |
| url | http://www.sciencedirect.com/science/article/pii/S266635972300077X |
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