Non-universality of elastic exponents in random bond-bending networks

Details Non-universality of elastic exponents in random bond-bending networks Non-universality of elastic exponents in random bond-bending networks

2003-04-17

arxiv.org/abs/cond-mat/0304391v2

Phys. Rev. E 68, 025101(R) (2003)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 3 figures, minor clarifications and amendments. To appear in PRE Rap. Comm

Scientific paper

10.1103/PhysRevE.68.025101

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.

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