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3D DEM Analysis of Particle Breakage Effect on Direct Shear Tests of Coarse Sand
This paper explores the effect of particle breakage on the mechanical behavior of coarse sand through 3D Discrete Element Method (DEM) simulations of direct shear tests (DST). The objective is to gain insights into the macro- and micro-mechanical behaviors of crushable coarse sand, with a particular...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10384434/ https://www.ncbi.nlm.nih.gov/pubmed/37512299 http://dx.doi.org/10.3390/ma16145025 |
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author | Benmebarek, Mohamed Amine Movahedi Rad, Majid Benmebarek, Sadok |
author_facet | Benmebarek, Mohamed Amine Movahedi Rad, Majid Benmebarek, Sadok |
author_sort | Benmebarek, Mohamed Amine |
collection | PubMed |
description | This paper explores the effect of particle breakage on the mechanical behavior of coarse sand through 3D Discrete Element Method (DEM) simulations of direct shear tests (DST). The objective is to gain insights into the macro- and micro-mechanical behaviors of crushable coarse sand, with a particular focus on the stress–strain relationship, volumetric deformation, and evolution of grain crushing. The simulations involve a comparison between non-crushable and crushable particle models, where the crushable particles are implemented in the shear zone of the DST subjected to different high normal stresses. The findings indicate that the crushable particles experience partial crushing at peak shear stress, with further particle crushing leading to the production of finer particles at the shearing plane during shearing at the critical state. The migration of these finer particles under pressure and gravity generates their accumulation predominantly in the lower section of the simulation box. Importantly, the presence of crushing in the DST induces a decrease in the shear stress and an increase in the volumetric strain leading to contractive behavior instead of dilation, which gradually stabilizes the volumetric deformation at higher normal stresses. |
format | Online Article Text |
id | pubmed-10384434 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-103844342023-07-30 3D DEM Analysis of Particle Breakage Effect on Direct Shear Tests of Coarse Sand Benmebarek, Mohamed Amine Movahedi Rad, Majid Benmebarek, Sadok Materials (Basel) Article This paper explores the effect of particle breakage on the mechanical behavior of coarse sand through 3D Discrete Element Method (DEM) simulations of direct shear tests (DST). The objective is to gain insights into the macro- and micro-mechanical behaviors of crushable coarse sand, with a particular focus on the stress–strain relationship, volumetric deformation, and evolution of grain crushing. The simulations involve a comparison between non-crushable and crushable particle models, where the crushable particles are implemented in the shear zone of the DST subjected to different high normal stresses. The findings indicate that the crushable particles experience partial crushing at peak shear stress, with further particle crushing leading to the production of finer particles at the shearing plane during shearing at the critical state. The migration of these finer particles under pressure and gravity generates their accumulation predominantly in the lower section of the simulation box. Importantly, the presence of crushing in the DST induces a decrease in the shear stress and an increase in the volumetric strain leading to contractive behavior instead of dilation, which gradually stabilizes the volumetric deformation at higher normal stresses. MDPI 2023-07-16 /pmc/articles/PMC10384434/ /pubmed/37512299 http://dx.doi.org/10.3390/ma16145025 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Benmebarek, Mohamed Amine Movahedi Rad, Majid Benmebarek, Sadok 3D DEM Analysis of Particle Breakage Effect on Direct Shear Tests of Coarse Sand |
title | 3D DEM Analysis of Particle Breakage Effect on Direct Shear Tests of Coarse Sand |
title_full | 3D DEM Analysis of Particle Breakage Effect on Direct Shear Tests of Coarse Sand |
title_fullStr | 3D DEM Analysis of Particle Breakage Effect on Direct Shear Tests of Coarse Sand |
title_full_unstemmed | 3D DEM Analysis of Particle Breakage Effect on Direct Shear Tests of Coarse Sand |
title_short | 3D DEM Analysis of Particle Breakage Effect on Direct Shear Tests of Coarse Sand |
title_sort | 3d dem analysis of particle breakage effect on direct shear tests of coarse sand |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10384434/ https://www.ncbi.nlm.nih.gov/pubmed/37512299 http://dx.doi.org/10.3390/ma16145025 |
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