Semiflexible Filamentous Composites

Details Semiflexible Filamentous Composites Semiflexible Filamentous Composites

2010-08-30

arxiv.org/abs/1008.5072v1

Biology

Quantitative Biology

Biomolecules

Phys. Rev. Lett, to appear (4 pages, 2 figures)

Scientific paper

Inspired by the ubiquity of composite filamentous networks in nature we investigate models of biopolymer networks that consist of interconnected floppy and stiff filaments. Numerical simulations carried out in three dimensions allow us to explore the microscopic partitioning of stresses and strains between the stiff and floppy fractions c_s and c_f, and reveal a non-trivial relationship between the mechanical behavior and the relative fraction of stiff polymer: when there are few stiff polymers, non-percolated stiff ``inclusions`` are protected from large deformations by an encompassing floppy matrix, while at higher fractions of stiff material the stiff network is independently percolated and dominates the mechanical response.

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