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The Royal Society, Journal of the Royal Society. Interface, 61(8), p. 1166-1175, 2011

DOI: 10.1098/rsif.2010.0582

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The effect of aspect ratio on adhesion and stiffness for soft elastic fibres

Journal article published in 2011 by Burak Aksak, Chung-Yuen Hui ORCID, Metin Sitti
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

The effect of aspect ratio on the pull-off stress and stiffness of soft elastic fibres is studied using elasticity and numerical analysis. The adhesive interface between a soft fibre and a smooth rigid surface is modelled using the Dugdale–Barenblatt model. Numerical simulations show that, while pull-off stress increases with decreasing aspect ratio, fibres get stiffer. Also, for sufficiently low aspect ratio fibres, failure occurs via the growth of internal cracks and pull-off stress approaches the intrinsic adhesive strength. Experiments carried out with various aspect ratio polyurethane elastomer fibres are consistent with the numerical simulations.