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research article

Jamming with Tunable Roughness

Ikeda, Harukuni
•
Brito, Carolina
•
Wyart, Matthieu  
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May 18, 2020
Physical Review Letters

We introduce a new model to study the effect of surface roughness on the jamming transition. By performing numerical simulations, we show that for a smooth surface, the jamming transition density and the contact number at the transition point both increase upon increasing asphericity, as for ellipsoids and spherocylinders. Conversely, for a rough surface, both quantities decrease, in quantitative agreement with the behavior of frictional particles. Furthermore, in the limit corresponding to the Coulomb friction law, the model satisfies a generalized isostaticity criterion proposed in previous studies. We introduce a counting argument that justifies this criterion and interprets it geometrically. Finally, we propose a simple theory to predict the contact number at finite friction from the knowledge of the force distribution in the infinite friction limit.

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Type
research article
DOI
10.1103/PhysRevLett.124.208001
Web of Science ID

WOS:000533504100009

Author(s)
Ikeda, Harukuni
Brito, Carolina
Wyart, Matthieu  
Zamponi, Francesco
Date Issued

2020-05-18

Publisher

AMER PHYSICAL SOC

Published in
Physical Review Letters
Volume

124

Issue

20

Article Number

208001

Subjects

Physics, Multidisciplinary

•

Physics

•

mechanics

•

rigidity

•

density

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
PCSL  
Available on Infoscience
May 29, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/169005
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