Force correlations, anisotropy, and friction mobilization in granular assemblies under uniaxial deformation

O.I. Imole; M. Wojtkowski; V. Magnanimo; S. Luding

doi:10.1063/1.4812003

Force correlations, anisotropy, and friction mobilization in granular assemblies under uniaxial deformation

O.I. Imole, M. Wojtkowski, V. Magnanimo, S. Luding

Faculty of Engineering Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

3 Citations (Scopus)

11 Downloads (Pure)

Abstract

We study dense, frictional, polydisperse 3D granular assemblies under uniaxial deformation with Discrete Element Method (DEM) simulations. The overall goal – beyond the scope of the present study – is to link microscopic parameters and observations with the macroscopic behavior, for different elementary deformation modes. At present, we focus on the behavior of the force/contact network during uniaxial deformation, for different coefficients of friction. We discuss the stress and structural anisotropy and the relationship between force intensity weighted by contact state (sticking or sliding, at the Coulomb limit) or force strength. Furthermore, we study the orientational distribution of contacts and forces and the contribution of friction to structural anisotropy. We find that initial isotropic states are irrecoverable, since the structural anisotropy is independent of the deviatoric stress behavior both with and without friction. Contacts display an interesting anisotropy of order four in the presence of friction.

Original language	English
Title of host publication	Powders and Grains 2013
Subtitle of host publication	Proceedings of the 7th International Conference on Micromechanics of Granular Media
Editors	Aibing Yu, Kejun Dong, Runyu Yang, Stefan Luding
Publisher	American Institute of Physics
Pages	601-604
ISBN (Print)	978-0-7354-1166-1
DOIs	https://doi.org/10.1063/1.4812003
Publication status	Published - 8 Jul 2013
Event	7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013 - Sydney, Australia Duration: 8 Jul 2013 → 12 Jul 2013 Conference number: 7 http://www.pg2013.unsw.edu.au/

Publication series

Name	AIP Conference Proceedings
Publisher	AIP Publishing LLC
Volume	1542
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013
Abbreviated title	Powders & Grains
Country/Territory	Australia
City	Sydney
Period	8/07/13 → 12/07/13
Internet address	http://www.pg2013.unsw.edu.au/

Keywords

DEM
Friction
Sliding contacts
Uniaxial deformation
PARDEM

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10.1063/1.4812003

Imole2013forceFinal published version, 247 KBLicence: CC BY

Cite this

Imole, O. I., Wojtkowski, M., Magnanimo, V., & Luding, S. (2013). Force correlations, anisotropy, and friction mobilization in granular assemblies under uniaxial deformation. In A. Yu, K. Dong, R. Yang, & S. Luding (Eds.), Powders and Grains 2013: Proceedings of the 7th International Conference on Micromechanics of Granular Media (pp. 601-604). (AIP Conference Proceedings; Vol. 1542). American Institute of Physics. https://doi.org/10.1063/1.4812003

Imole, O.I. ; Wojtkowski, M. ; Magnanimo, V. et al. / Force correlations, anisotropy, and friction mobilization in granular assemblies under uniaxial deformation. Powders and Grains 2013: Proceedings of the 7th International Conference on Micromechanics of Granular Media. editor / Aibing Yu ; Kejun Dong ; Runyu Yang ; Stefan Luding. American Institute of Physics, 2013. pp. 601-604 (AIP Conference Proceedings).

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title = "Force correlations, anisotropy, and friction mobilization in granular assemblies under uniaxial deformation",

abstract = "We study dense, frictional, polydisperse 3D granular assemblies under uniaxial deformation with Discrete Element Method (DEM) simulations. The overall goal – beyond the scope of the present study – is to link microscopic parameters and observations with the macroscopic behavior, for different elementary deformation modes. At present, we focus on the behavior of the force/contact network during uniaxial deformation, for different coefficients of friction. We discuss the stress and structural anisotropy and the relationship between force intensity weighted by contact state (sticking or sliding, at the Coulomb limit) or force strength. Furthermore, we study the orientational distribution of contacts and forces and the contribution of friction to structural anisotropy. We find that initial isotropic states are irrecoverable, since the structural anisotropy is independent of the deviatoric stress behavior both with and without friction. Contacts display an interesting anisotropy of order four in the presence of friction.",

keywords = "DEM, Friction, Sliding contacts, Uniaxial deformation, PARDEM",

author = "O.I. Imole and M. Wojtkowski and V. Magnanimo and S. Luding",

year = "2013",

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booktitle = "Powders and Grains 2013",

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note = "7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013, Powders & Grains ; Conference date: 08-07-2013 Through 12-07-2013",

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Imole, OI, Wojtkowski, M, Magnanimo, V & Luding, S 2013, Force correlations, anisotropy, and friction mobilization in granular assemblies under uniaxial deformation. in A Yu, K Dong, R Yang & S Luding (eds), Powders and Grains 2013: Proceedings of the 7th International Conference on Micromechanics of Granular Media. AIP Conference Proceedings, vol. 1542, American Institute of Physics, pp. 601-604, 7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013, Sydney, New South Wales, Australia, 8/07/13. https://doi.org/10.1063/1.4812003

Force correlations, anisotropy, and friction mobilization in granular assemblies under uniaxial deformation. / Imole, O.I.; Wojtkowski, M.; Magnanimo, V. et al.

Powders and Grains 2013: Proceedings of the 7th International Conference on Micromechanics of Granular Media. ed. / Aibing Yu; Kejun Dong; Runyu Yang; Stefan Luding. American Institute of Physics, 2013. p. 601-604 (AIP Conference Proceedings; Vol. 1542).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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AU - Imole, O.I.

AU - Wojtkowski, M.

AU - Magnanimo, V.

AU - Luding, S.

N1 - Conference code: 7

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N2 - We study dense, frictional, polydisperse 3D granular assemblies under uniaxial deformation with Discrete Element Method (DEM) simulations. The overall goal – beyond the scope of the present study – is to link microscopic parameters and observations with the macroscopic behavior, for different elementary deformation modes. At present, we focus on the behavior of the force/contact network during uniaxial deformation, for different coefficients of friction. We discuss the stress and structural anisotropy and the relationship between force intensity weighted by contact state (sticking or sliding, at the Coulomb limit) or force strength. Furthermore, we study the orientational distribution of contacts and forces and the contribution of friction to structural anisotropy. We find that initial isotropic states are irrecoverable, since the structural anisotropy is independent of the deviatoric stress behavior both with and without friction. Contacts display an interesting anisotropy of order four in the presence of friction.

AB - We study dense, frictional, polydisperse 3D granular assemblies under uniaxial deformation with Discrete Element Method (DEM) simulations. The overall goal – beyond the scope of the present study – is to link microscopic parameters and observations with the macroscopic behavior, for different elementary deformation modes. At present, we focus on the behavior of the force/contact network during uniaxial deformation, for different coefficients of friction. We discuss the stress and structural anisotropy and the relationship between force intensity weighted by contact state (sticking or sliding, at the Coulomb limit) or force strength. Furthermore, we study the orientational distribution of contacts and forces and the contribution of friction to structural anisotropy. We find that initial isotropic states are irrecoverable, since the structural anisotropy is independent of the deviatoric stress behavior both with and without friction. Contacts display an interesting anisotropy of order four in the presence of friction.

KW - DEM

KW - Friction

KW - Sliding contacts

KW - Uniaxial deformation

KW - PARDEM

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DO - 10.1063/1.4812003

M3 - Conference contribution

SN - 978-0-7354-1166-1

T3 - AIP Conference Proceedings

SP - 601

EP - 604

BT - Powders and Grains 2013

A2 - Yu, Aibing

A2 - Dong, Kejun

A2 - Yang, Runyu

A2 - Luding, Stefan

PB - American Institute of Physics

T2 - 7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013

Y2 - 8 July 2013 through 12 July 2013

ER -

Imole OI, Wojtkowski M, Magnanimo V , Luding S. Force correlations, anisotropy, and friction mobilization in granular assemblies under uniaxial deformation. In Yu A, Dong K, Yang R, Luding S, editors, Powders and Grains 2013: Proceedings of the 7th International Conference on Micromechanics of Granular Media. American Institute of Physics. 2013. p. 601-604. (AIP Conference Proceedings). doi: 10.1063/1.4812003

Force correlations, anisotropy, and friction mobilization in granular assemblies under uniaxial deformation

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Keywords

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