Issue 19, 2016

Importance of non-affine viscoelastic response in disordered fibre networks

Abstract

Disordered fibre networks are ubiquitous in nature and have a wide range of industrial applications as novel biomaterials. Predicting their viscoelastic response is straightforward for affine deformations that are uniform over all length scales, but when affinity fails, as has been observed experimentally, modelling becomes challenging. Here we present a numerical methodology, related to an existing framework for amorphous packings, to predict the steady-state viscoelastic spectra and degree of affinity for disordered fibre networks driven at arbitrary frequencies. Applying this method to a peptide gel model reveals a monotonic increase of the shear modulus as the soft, non-affine normal modes are successively suppressed as the driving frequency increases. In addition to being dominated by fibril bending, these low frequency network modes are also shown to be delocalised. The presented methodology provides insights into the importance of non-affinity in the viscoelastic response of peptide gels, and is easily extendible to all types of fibre networks.

Graphical abstract: Importance of non-affine viscoelastic response in disordered fibre networks

Article information

Article type
Paper
Submitted
18 জানু 2016
Accepted
08 এপ্রিল 2016
First published
11 এপ্রিল 2016

Soft Matter, 2016,12, 4332-4338

Importance of non-affine viscoelastic response in disordered fibre networks

L. G. Rizzi, S. Auer and D. A. Head, Soft Matter, 2016, 12, 4332 DOI: 10.1039/C6SM00139D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements