The role of structure in the nonlinear mechanics of cross-linked semiflexible polymer networks

The Journal of Chemical Physics
Nicholas A KurniawanRaj Rajagopalan

Abstract

The microstructural basis of the characteristic nonlinear mechanics of biopolymer networks remains unclear. We present a 3D network model of realistic, cross-linked semiflexible fibers to study strain-stiffening and the effect of fiber volume-occupancy. We identify two structural parameters, namely, network connectivity and fiber entanglements, that fully govern the nonlinear response from small to large strains. The results also reveal distinct deformation mechanisms at different length scales and, in particular, the contributions of heterogeneity at short length scales.

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Citations

Jan 3, 2013·The Journal of Chemical Physics·Jan ZidekThomas A Vilgis
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Aug 12, 2019·ACS Biomaterials Science & Engineering·Bo GongYuan Lin

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Methods Mentioned

BETA
rheology
fluorescence microscopy

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