Footprints in Sand: The Response of a Granular Material to Local Perturbations

We experimentally determine ensemble-averaged responses of granular packings to point forces, and we compare these results to recent models for force propagation in a granular material. We used 2D granular arrays consisting of photoelastic particles: either disks or pentagons, thus spanning the rang...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2003-04
Main Authors: Geng, Junfei, Howell, D, Longhi, E, Behringer, R P, Reydellet, G, Vanel, L, Clement, E, Luding, S
Format: Article
Language:English
Subjects:
Disks
Granular materials
Two dimensional models
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We experimentally determine ensemble-averaged responses of granular packings to point forces, and we compare these results to recent models for force propagation in a granular material. We used 2D granular arrays consisting of photoelastic particles: either disks or pentagons, thus spanning the range from ordered to disordered packings. A key finding is that spatial ordering of the particles is a key factor in the force response. Ordered packings have a propagative component that does not occur in disordered packings.
ISSN:2331-8422
DOI:10.48550/arxiv.0012127