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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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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