Combined effects of contact friction and particle shape on strength properties and microstructure of sheared granular media

© 2020 American Physical Society. We present a systematic numerical investigation concerning the combined effects of sliding friction and particle shape (i.e., angularity) parameters on the shear strength and microstructure of granular packings. Sliding friction at contacts varied from 0 (frictionle...

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Main Authors: Theechalit Binaree, Emilien Azéma, Nicolas Estrada, Mathieu Renouf, Itthichai Preechawuttipong
Format: Journal
Published: 2020
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/70702
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-707022020-10-14T08:49:11Z Combined effects of contact friction and particle shape on strength properties and microstructure of sheared granular media Theechalit Binaree Emilien Azéma Nicolas Estrada Mathieu Renouf Itthichai Preechawuttipong Mathematics Physics and Astronomy © 2020 American Physical Society. We present a systematic numerical investigation concerning the combined effects of sliding friction and particle shape (i.e., angularity) parameters on the shear strength and microstructure of granular packings. Sliding friction at contacts varied from 0 (frictionless particles) to 0.7, and the particles were irregular polygons with an increasing number of sides, ranging from triangles to disks. We find that the effect of local friction on shear strength follows the same trend for all shapes. Strength first increases with local friction and then saturates at a shape-dependent value. In contrast, the effect of angularity varies, depending on the level of sliding friction. For low friction values (i.e., under 0.3), the strength first increases with angularity and then declines for the most angular shapes. For high friction values, strength systematically increases with angularity. At the microscale, we focus on the connectivity and texture of the contact and force networks. In general terms, increasing local friction causes these networks to be less connected and more anisotropic. In contrast, increasing particle angularity may change the network topology in different directions, directly affecting the macroscopic shear strength. These analyses and data constitute a first step toward understanding the joint effect of local variables such as friction and grain shape on the macroscopic rheology of granular systems. 2020-10-14T08:39:40Z 2020-10-14T08:39:40Z 2020-08-01 Journal 24700053 24700045 2-s2.0-85090347817 10.1103/PhysRevE.102.022901 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85090347817&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/70702
institution Chiang Mai University
building Chiang Mai University Library
continent Asia
country Thailand
Thailand
content_provider Chiang Mai University Library
collection CMU Intellectual Repository
topic Mathematics
Physics and Astronomy
spellingShingle Mathematics
Physics and Astronomy
Theechalit Binaree
Emilien Azéma
Nicolas Estrada
Mathieu Renouf
Itthichai Preechawuttipong
Combined effects of contact friction and particle shape on strength properties and microstructure of sheared granular media
description © 2020 American Physical Society. We present a systematic numerical investigation concerning the combined effects of sliding friction and particle shape (i.e., angularity) parameters on the shear strength and microstructure of granular packings. Sliding friction at contacts varied from 0 (frictionless particles) to 0.7, and the particles were irregular polygons with an increasing number of sides, ranging from triangles to disks. We find that the effect of local friction on shear strength follows the same trend for all shapes. Strength first increases with local friction and then saturates at a shape-dependent value. In contrast, the effect of angularity varies, depending on the level of sliding friction. For low friction values (i.e., under 0.3), the strength first increases with angularity and then declines for the most angular shapes. For high friction values, strength systematically increases with angularity. At the microscale, we focus on the connectivity and texture of the contact and force networks. In general terms, increasing local friction causes these networks to be less connected and more anisotropic. In contrast, increasing particle angularity may change the network topology in different directions, directly affecting the macroscopic shear strength. These analyses and data constitute a first step toward understanding the joint effect of local variables such as friction and grain shape on the macroscopic rheology of granular systems.
format Journal
author Theechalit Binaree
Emilien Azéma
Nicolas Estrada
Mathieu Renouf
Itthichai Preechawuttipong
author_facet Theechalit Binaree
Emilien Azéma
Nicolas Estrada
Mathieu Renouf
Itthichai Preechawuttipong
author_sort Theechalit Binaree
title Combined effects of contact friction and particle shape on strength properties and microstructure of sheared granular media
title_short Combined effects of contact friction and particle shape on strength properties and microstructure of sheared granular media
title_full Combined effects of contact friction and particle shape on strength properties and microstructure of sheared granular media
title_fullStr Combined effects of contact friction and particle shape on strength properties and microstructure of sheared granular media
title_full_unstemmed Combined effects of contact friction and particle shape on strength properties and microstructure of sheared granular media
title_sort combined effects of contact friction and particle shape on strength properties and microstructure of sheared granular media
publishDate 2020
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85090347817&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/70702
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