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Issue 4, 2013
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The ‘Sticky Elastica’: delamination blisters beyond small deformations

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Abstract

We consider the form of an elastic loop adhered to a rigid substrate: the ‘Sticky Elastica’. In contrast to previous studies of the shape of delamination ‘blisters’, the theory developed accounts for deflections with large slope (i.e. geometrically nonlinear). Starting from the classical Euler Elastica we provide numerical results for the dimensions of such blisters for a variety of end–end confinements and develop asymptotic expressions that reproduce these results well, even up to the point of self-contact. Interestingly, we find that the width of such blisters does not grow monotonically with increased confinement. Our theoretical predictions are confirmed by simple desktop experiments and suggest a new method for the measurement of the elastocapillary length for deformations that cannot be considered small. We discuss the implications of our results for applications such as flexible electronics.

Graphical abstract: The ‘Sticky Elastica’: delamination blisters beyond small deformations

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Article information


Submitted
17 Aug 2012
Accepted
08 Nov 2012
First published
27 Nov 2012

Soft Matter, 2013,9, 1025-1030
Article type
Paper

The ‘Sticky Elastica’: delamination blisters beyond small deformations

T. J. W. Wagner and D. Vella, Soft Matter, 2013, 9, 1025
DOI: 10.1039/C2SM26916C

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