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Friday, 08 September, 2006

Floppy Modes and Nonaffine Deformations in Random Fiber Networks

Claus Heussinger and Erwin Frey -
Phys. Rev. Lett. 97, 105501 (2006)

We study the elasticity of random fiber networks. Starting from a microscopic picture of the nonaffine deformation fields, we calculate the macroscopic elastic moduli both in a scaling theory and a self-consistent effective medium theory. By relating nonaffinity to the low-energy excitations of the network ("floppy modes"), we achieve a detailed characterization of the nonaffine deformations present in fibrous networks.Our results are confirmed by stochastic simulations.


Article on the journal's website