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Quantifying Interparticle Forces and Heterogeneity in 3D Granular Materials

Hurley, R. C.; Hall, S. A. LU ; Andrade, J. E. and Wright, J. (2016) In Physical Review Letters 117(9).
Abstract

Interparticle forces in granular materials are intimately linked to mechanical properties and are known to self-organize into heterogeneous structures, or force chains, under external load. Despite progress in understanding the statistics and spatial distribution of interparticle forces in recent decades, a systematic method for measuring forces in opaque, three-dimensional (3D), frictional, stiff granular media has yet to emerge. In this Letter, we present results from an experiment that combines 3D x-ray diffraction, x-ray tomography, and a numerical force inference technique to quantify interparticle forces and their heterogeneity in an assembly of quartz grains undergoing a one-dimensional compression cycle. Forces exhibit an... (More)

Interparticle forces in granular materials are intimately linked to mechanical properties and are known to self-organize into heterogeneous structures, or force chains, under external load. Despite progress in understanding the statistics and spatial distribution of interparticle forces in recent decades, a systematic method for measuring forces in opaque, three-dimensional (3D), frictional, stiff granular media has yet to emerge. In this Letter, we present results from an experiment that combines 3D x-ray diffraction, x-ray tomography, and a numerical force inference technique to quantify interparticle forces and their heterogeneity in an assembly of quartz grains undergoing a one-dimensional compression cycle. Forces exhibit an exponential decay above the mean and partition into strong and weak networks. We find a surprising inverse relationship between macroscopic load and the heterogeneity of interparticle forces, despite the clear emergence of two force chains that span the system.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
117
issue
9
publisher
American Physical Society
external identifiers
  • scopus:84988485765
  • wos:000382008100016
ISSN
0031-9007
DOI
10.1103/PhysRevLett.117.098005
language
English
LU publication?
yes
id
66c85e12-f241-4cab-9bbf-14a8b6daccf6
date added to LUP
2016-12-02 13:07:18
date last changed
2017-10-22 05:22:53
@article{66c85e12-f241-4cab-9bbf-14a8b6daccf6,
  abstract     = {<p>Interparticle forces in granular materials are intimately linked to mechanical properties and are known to self-organize into heterogeneous structures, or force chains, under external load. Despite progress in understanding the statistics and spatial distribution of interparticle forces in recent decades, a systematic method for measuring forces in opaque, three-dimensional (3D), frictional, stiff granular media has yet to emerge. In this Letter, we present results from an experiment that combines 3D x-ray diffraction, x-ray tomography, and a numerical force inference technique to quantify interparticle forces and their heterogeneity in an assembly of quartz grains undergoing a one-dimensional compression cycle. Forces exhibit an exponential decay above the mean and partition into strong and weak networks. We find a surprising inverse relationship between macroscopic load and the heterogeneity of interparticle forces, despite the clear emergence of two force chains that span the system.</p>},
  articleno    = {098005},
  author       = {Hurley, R. C. and Hall, S. A. and Andrade, J. E. and Wright, J.},
  issn         = {0031-9007},
  language     = {eng},
  month        = {08},
  number       = {9},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Quantifying Interparticle Forces and Heterogeneity in 3D Granular Materials},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.117.098005},
  volume       = {117},
  year         = {2016},
}