Granular dynamics in compaction and stress relaxation
Soft Condensed Matter
2009-11-11 v1
Abstract
Elastic and dissipative properties of granular assemblies under uniaxial compression are studied both experimentally and by numerical simulations. Following a novel compaction procedure at varying oscillatory pressures, the stress response to a step-strain reveals an exponential relaxation followed by a slow logarithmic decay. Simulations indicate that the latter arises from the coupling between damping and collective grain motion predominantly through sliding. We characterize an analogous "glass transition" for packed grains, below which the system shows aging in time-dependent sliding correlation functions.
Cite
@article{arxiv.cond-mat/0509416,
title = {Granular dynamics in compaction and stress relaxation},
author = {Jasna Brujic and Ping Wang and Chaoming Song and David L. Johnson and Olivier Sindt and Hernan A. Makse},
journal= {arXiv preprint arXiv:cond-mat/0509416},
year = {2009}
}
Comments
5 pages, 5 figures