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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...

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Detalles Bibliográficos
Autores principales: Benmebarek, Mohamed Amine, Movahedi Rad, Majid, Benmebarek, Sadok
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
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.
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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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