Spanning the scales of granular materials through microscopic force imaging

Abstract : If you walk on sand, it supports your weight. How do the disordered forces between particles in sand organize, to keep you from sinking? This simple question is surprisingly difficult to answer experimentally: measuring forces in three dimensions, between deeply buried grains, is challenging. Here we describe experiments in which we have succeeded in measuring forces inside a granular packing subject to controlled deformations. We connect the measured micro-scale forces to the macro-scale packing force response with an averaging, mean field calculation. This calculation explains how the combination of packing structure and contact deformations produce the observed nontrivial mechanical response of the packing, revealing a surprising microscopic particle deformation enhancement mechanism.
Complete list of metadatas

Cited literature [21 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01128576
Contributor : Nicolas Brodu <>
Submitted on : Tuesday, March 10, 2015 - 12:29:22 AM
Last modification on : Tuesday, August 20, 2019 - 5:12:02 PM
Long-term archiving on: Thursday, June 11, 2015 - 10:11:11 AM

File

ncomms7361.pdf
Publication funded by an institution

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Collections

Citation

Nicolas Brodu, Joshua Dijksman, Robert Behringer. Spanning the scales of granular materials through microscopic force imaging. Nature Communications, Nature Publishing Group, 2015, 6, pp.6361. ⟨10.1038/ncomms7361⟩. ⟨hal-01128576⟩

Share

Metrics

Record views

365

Files downloads

288