Exploring the effects of particle shape and content of fines on the shear behavior of sand-fines mixtures via the DEM

Jian Gong; Zhihong Nie; Yangui Zhu; Zhengyu Liang; Xiang Wang

doi:10.1016/j.compgeo.2018.10.021

Exploring the effects of particle shape and content of fines on the shear behavior of sand-fines mixtures via the DEM

Jian Gong, Zhihong Nie, Yangui Zhu, Zhengyu Liang, Xiang Wang

Research output: Journal article publication › Journal article › Academic research › peer-review

170 Citations (Scopus)

Abstract

This report explores the effects of particle shape and content of fines on the shear behavior of sand-fines mixtures using a two-dimensional discrete element method. The contributions of different contact types to the residual shear strength are quantified. Microscopic analysis of each contact type, including coordination number, normal contact force and their contributions to the principal stress components, reveals why the contribution of each contact type to the residual shear strength is varied. Finally, anisotropic analysis enables us to understand the microscopic mechanisms that cause the residual shear strength to be dependent on the particle shape and content of fines.

Original language	English
Pages (from-to)	161-176
Number of pages	16
Journal	Computers and Geotechnics
Volume	106
DOIs	https://doi.org/10.1016/j.compgeo.2018.10.021
Publication status	Published - Feb 2019
Externally published	Yes

Keywords

Anisotropy
Contact type
Fines content
Particle shape
Residual shear strength
Sand-fines mixtures

ASJC Scopus subject areas

Geotechnical Engineering and Engineering Geology
Computer Science Applications

More information

10.1016/j.compgeo.2018.10.021

Cite this

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abstract = "This report explores the effects of particle shape and content of fines on the shear behavior of sand-fines mixtures using a two-dimensional discrete element method. The contributions of different contact types to the residual shear strength are quantified. Microscopic analysis of each contact type, including coordination number, normal contact force and their contributions to the principal stress components, reveals why the contribution of each contact type to the residual shear strength is varied. Finally, anisotropic analysis enables us to understand the microscopic mechanisms that cause the residual shear strength to be dependent on the particle shape and content of fines.",

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AU - Gong, Jian

AU - Nie, Zhihong

AU - Zhu, Yangui

AU - Liang, Zhengyu

AU - Wang, Xiang

PY - 2019/2

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AB - This report explores the effects of particle shape and content of fines on the shear behavior of sand-fines mixtures using a two-dimensional discrete element method. The contributions of different contact types to the residual shear strength are quantified. Microscopic analysis of each contact type, including coordination number, normal contact force and their contributions to the principal stress components, reveals why the contribution of each contact type to the residual shear strength is varied. Finally, anisotropic analysis enables us to understand the microscopic mechanisms that cause the residual shear strength to be dependent on the particle shape and content of fines.

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KW - Contact type

KW - Fines content

KW - Particle shape

KW - Residual shear strength

KW - Sand-fines mixtures

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SN - 0266-352X

VL - 106

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JO - Computers and Geotechnics

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ER -

Exploring the effects of particle shape and content of fines on the shear behavior of sand-fines mixtures via the DEM

Abstract

Keywords

ASJC Scopus subject areas

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