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Adhesion and Debonding of Soft Elastic Films on Rough and Patterned Surfaces

Sarkar, Jayati and Sharma, Ashutosh and Shenoy, Vijay (2005) Adhesion and Debonding of Soft Elastic Films on Rough and Patterned Surfaces. In: The Journal of Adhesion, 81 (3-4). pp. 271-295.

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Abstract

With the help of simulations based on energy minimization, we have studied the effect of roughness of a rigid contactor with sinusoidal and step patterns on the adhesion-debonding cycle of a soft thin elastic film. The surface instability engendered by attractive forces between the contactor and the film produces a regularly spaced array of columns in the bonding phase. The inter-column spacing is governed largely by periodicity of the contactor pattern. Decreased periodicity of the pattern favors intermittent collapse of columns rather than a continuous peeling of contact zones. An increase in the amplitude of roughness decreases the maximum force required for debonding and increases the snap-off distance. The net effect results in a reduced work for debonding. Introduction of noise and increased step-size in simulations decreases the pull-off force and the snap-off distance, as in the case of a smooth contactor. Finally the study reveals that a patterned contactor can be used as a potential template in the patterning of soft interfaces.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to TAYLOR & FRANCIS LTD.
Keywords: Elastic film;Interfacial crack;Adhesion;Debonding;Patterning
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 02 Dec 2008 11:08
Last Modified: 02 Dec 2008 11:08
URI: http://eprints.iisc.ernet.in/id/eprint/16742

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