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Multi-scale mechanics of granular solids from grain-resolved X-ray measurements

Hurley, R. C.; Hall, S. A. LU and Wright, J. P. (2017) In Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 473(2207).
Abstract

This work discusses an experimental technique for studying the mechanics of three-dimensional (3D) granular solids. The approach combines 3D X-ray diffraction and X-ray computed tomography to measure grain-resolved strains, kinematics and contact fabric in the bulk of a granular solid, from which continuum strains, grain stresses, interparticle forces and coarse-grained elasto-plastic moduli can be determined. We demonstrate the experimental approach and analysis of selected results on a sample of 1099 stiff, frictional grains undergoing multiple uniaxial compression cycles. We investigate the interparticle force network, elasto-plastic moduli and associated length scales, reversibility of mechanical responses during cyclic loading, the... (More)

This work discusses an experimental technique for studying the mechanics of three-dimensional (3D) granular solids. The approach combines 3D X-ray diffraction and X-ray computed tomography to measure grain-resolved strains, kinematics and contact fabric in the bulk of a granular solid, from which continuum strains, grain stresses, interparticle forces and coarse-grained elasto-plastic moduli can be determined. We demonstrate the experimental approach and analysis of selected results on a sample of 1099 stiff, frictional grains undergoing multiple uniaxial compression cycles. We investigate the interparticle force network, elasto-plastic moduli and associated length scales, reversibility of mechanical responses during cyclic loading, the statistics of microscopic responses and microstructure-property relationships. This work serves to highlight both the fundamental insight into granular mechanics that is furnished by combined X-ray measurements and describes future directions in the field of granular materials that can be pursued with such approaches.

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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
keywords
Granular solids, Multi-scale mechanics, Three-dimensional X-ray diffraction, X-ray computed tomography
in
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
volume
473
issue
2207
publisher
Royal Society
external identifiers
  • scopus:85037742878
  • wos:000416736700016
ISSN
1364-5021
DOI
10.1098/rspa.2017.0491
language
English
LU publication?
yes
id
40b1aef5-243a-4eda-89d3-b2da10712190
date added to LUP
2018-01-04 11:08:44
date last changed
2018-04-06 03:00:13
@article{40b1aef5-243a-4eda-89d3-b2da10712190,
  abstract     = {<p>This work discusses an experimental technique for studying the mechanics of three-dimensional (3D) granular solids. The approach combines 3D X-ray diffraction and X-ray computed tomography to measure grain-resolved strains, kinematics and contact fabric in the bulk of a granular solid, from which continuum strains, grain stresses, interparticle forces and coarse-grained elasto-plastic moduli can be determined. We demonstrate the experimental approach and analysis of selected results on a sample of 1099 stiff, frictional grains undergoing multiple uniaxial compression cycles. We investigate the interparticle force network, elasto-plastic moduli and associated length scales, reversibility of mechanical responses during cyclic loading, the statistics of microscopic responses and microstructure-property relationships. This work serves to highlight both the fundamental insight into granular mechanics that is furnished by combined X-ray measurements and describes future directions in the field of granular materials that can be pursued with such approaches.</p>},
  articleno    = {20170491},
  author       = {Hurley, R. C. and Hall, S. A. and Wright, J. P.},
  issn         = {1364-5021},
  keyword      = {Granular solids,Multi-scale mechanics,Three-dimensional X-ray diffraction,X-ray computed tomography},
  language     = {eng},
  month        = {11},
  number       = {2207},
  publisher    = {Royal Society},
  series       = {Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences},
  title        = {Multi-scale mechanics of granular solids from grain-resolved X-ray measurements},
  url          = {http://dx.doi.org/10.1098/rspa.2017.0491},
  volume       = {473},
  year         = {2017},
}