Friction and Hertzian contact in granular glass

We study the jamming process arising in granular systems subjected to decreasing external vibration, which has features similar to the cooling of glass-forming liquids. We modify the friction between grains and observe that jamming occurs 'more easily' for grains with higher surface roughness. To understand the observed behavior we present a detailed analysis of the elastic and tribological phenomena at the length scale of the grains in contact and provide a qualitative model, where the Hertzian nonlinear elastic contact between grains plays a relevant role.


Published in:
Journal Of Statistical Mechanics-Theory And Experiment
Year:
2013
Publisher:
Bristol, Iop Publishing Ltd
ISSN:
1742-5468
Keywords:
Laboratories:




 Record created 2013-10-01, last modified 2018-03-17


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