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Floppy modes and non-affine deformations in random fiber networks

Claus Heussinger, Erwin Frey

cond-mat.softarXiv:cond-mat/0603697

Abstract

We study the elasticity of random fiber networks. Starting from a microscopic picture of the non-affine deformation fields we calculate the macroscopic elastic moduli both in a scaling theory and a self-consistent effective medium theory. By relating non-affinity to the low-energy excitations of the network (``floppy-modes'') we achieve a detailed characterization of the non-affine deformations present in fibrous networks.

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