Viscous Control of Peeling an Elastic Sheet by Bending and Pulling

Lister, John R. and Peng, Gunnar G. and Neufeld, Jerome A. (2013) Viscous Control of Peeling an Elastic Sheet by Bending and Pulling. Physical Review Letters, 111 (15). p. 154501. ISSN 0031-9007 ESSN: 1079-7114 DOI

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Propagation of a viscous fluid beneath an elastic sheet is controlled by local dynamics at the peeling front, in close analogy with the capillary-driven spreading of drops over a precursor film. Here we identify propagation laws for a generic elastic peeling problem in the distinct limits of peeling by bending and peeling by pulling, and apply our results to the radial spread of a fluid blister over a thin prewetting film. For the case of small deformations relative to the sheet thickness, peeling is driven by bending, leading to radial growth as t7/22. Experimental results reproduce both the spreading behavior and the bending wave at the front. For large deformations relative to the sheet thickness, stretching of the blister cap and the consequent tension can drive peeling either by bending or by pulling at the front, both leading to radial growth as t3/8. In this regime, detailed predictions give excellent agreement and explanation of previous experimental measurements of spread in the pulling regime in an elastic Hele-Shaw cell.

Item Type: Article
Uncontrolled Keywords: 2013AREP; IA66;
Subjects: 99 - Other
Divisions: 99 - Other
Journal or Publication Title: Physical Review Letters
Volume: 111
Page Range: p. 154501
Identification Number:
Depositing User: Sarah Humbert
Date Deposited: 24 Nov 2013 00:40
Last Modified: 16 Dec 2013 12:50

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