Internal stresses, normal modes, and nonaffinity in three-dimensional biopolymer networks

We numerically investigate deformations and modes of networks of semiflexible biopolymers as a function of crosslink coordination number z and strength of bending and stretching energies. In equilibrium filaments are under internal stress, and the networks exhibit shear rigidity below the Maxwell is...

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Bibliographic Details
Published inPhysical review letters Vol. 106; no. 8; p. 088301
Main Authors Huisman, E M, Lubensky, T C
Format Journal Article
LanguageEnglish
Published United States 25.02.2011
Subjects
Biomechanical Phenomena
Biopolymers - chemistry
Models, Molecular
Molecular Conformation
Stress, Mechanical
Thermodynamics
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Summary:We numerically investigate deformations and modes of networks of semiflexible biopolymers as a function of crosslink coordination number z and strength of bending and stretching energies. In equilibrium filaments are under internal stress, and the networks exhibit shear rigidity below the Maxwell isostatic point. In contrast to two-dimensional networks, ours exhibit nonaffine bending-dominated response in all rigid states, including those near the maximum of z=4 when bending energies are less than stretching ones.
ISSN:1079-7114
DOI:10.1103/PhysRevLett.106.088301