Nonlinear Poisson effect governed by mechanical critical transition
Soft Condensed Matter
2020-01-31 v4 Biological Physics
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.
Cite
@article{arxiv.1905.09844,
title = {Nonlinear Poisson effect governed by mechanical critical transition},
author = {Jordan L. Shivers and Sadjad Arzash and Fred C. MacKintosh},
journal= {arXiv preprint arXiv:1905.09844},
year = {2020}
}