Nonlinear Poisson Effect Governed by a Mechanical Critical Transition

Jordan L. Shivers, Sadjad Arzash, and F. C. MacKintosh
Phys. Rev. Lett. 124, 038002 – Published 23 January 2020
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Abstract

Under extensional strain, fiber networks can exhibit an anomalously large and nonlinear Poisson effect accompanied by a dramatic transverse contraction and volume reduction for applied strains as small as a few percent. We demonstrate that this phenomenon is controlled by a collective mechanical phase transition that occurs at a critical uniaxial strain that depends on network connectivity. This transition is punctuated by an anomalous peak in the apparent Poisson’s ratio and other critical signatures such as diverging nonaffine strain fluctuations.

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  • Received 5 August 2019

DOI:https://doi.org/10.1103/PhysRevLett.124.038002

© 2020 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
  1. Physical Systems
Condensed Matter, Materials & Applied PhysicsPhysics of Living SystemsPolymers & Soft Matter

Authors & Affiliations

Jordan L. Shivers1,2, Sadjad Arzash1,2, and F. C. MacKintosh1,2,3,*

  • 1Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, USA
  • 2Center for Theoretical Biological Physics, Rice University, Houston, Texas 77030, USA
  • 3Departments of Chemistry and Physics and Astronomy, Rice University, Houston, Texas 77005, USA

  • *Corresponding author. fcmack@gmail.com

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Issue

Vol. 124, Iss. 3 — 24 January 2020

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