Deformation of cross-linked semiflexible polymer networks |
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Authors: | Head David A Levine Alex J MacKintosh F C |
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Affiliation: | Division of Physics & Astronomy, Vrije Universiteit, 1081 HV Amsterdam, The Netherlands. |
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Abstract: | Networks of filamentous proteins play a crucial role in cell mechanics. These cytoskeletal networks, together with various cross-linking and other associated proteins largely determine the (visco)elastic response of cells. In this Letter we study a model system of cross-linked, stiff filaments in order to explore the connection between the microstructure under strain and the macroscopic response of cytoskeletal networks. We find two distinct regimes as a function primarily of cross-link density and filament rigidity: one characterized by affine deformation and one by nonaffine deformation. We characterize the crossover between these two. |
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