Non-universality of elastic exponents in random bond-bending networks
Statistical Mechanics
2009-11-10 v2 Soft Condensed Matter
Abstract
We numerically investigate the rigidity percolation transition in two-dimensional flexible, random rod networks with freely rotating cross-links. Near the transition, networks are dominated by bending modes and the elastic modulii vanish with an exponent f=3.0\pm0.2, in contrast with central force percolation which shares the same geometric exponents. This indicates that universality for geometric quantities does not imply universality for elastic ones. The implications of this result for actin-fiber networks is discussed.
Cite
@article{arxiv.cond-mat/0304391,
title = {Non-universality of elastic exponents in random bond-bending networks},
author = {D. A. Head and F. C. MacKintosh and A. J. Levine},
journal= {arXiv preprint arXiv:cond-mat/0304391},
year = {2009}
}
Comments
4 pages, 3 figures, minor clarifications and amendments. To appear in PRE Rap. Comm