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arXiv · 2206.04043

Non-affine mechanics of entangled networks inspired by intermediate filaments

M. Pensalfini·T. Golde·X. Trepat·M. Arroyo
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Abstract

Inspired by massive intermediate filament (IF) reorganization in superstretched epithelia, we examine computationally the principles controlling the mechanics of a set of entangled filaments whose ends slide on the cell boundary. We identify an entanglement metric and threshold beyond which random loose networks respond non-affinely and nonlinearly to stretch by self-organizing into structurally optimal star-shaped configurations. A simple model connecting cellular and filament strains links emergent mechanics to cell geometry, network topology, and filament mechanics. We identify a safety net mechanism in IF networks and provide a framework to harness entanglement in soft fibrous materials.

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M. Pensalfini, T. Golde, X. Trepat, M. Arroyo. 2022-06-08. Non-affine mechanics of entangled networks inspired by intermediate filaments. https://doi.org/10.1103/physrevlett.131.058101

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