Peeling from a biomimetically patterned thin elastic film

Ghatak, Animangsu and Mahadevan, L and Chung, Jun Young and Chaudhury, Manoj K and Shenoy, Vijay (2004) Peeling from a biomimetically patterned thin elastic film. In: Proceedings of the Royal Society of London Series A-Mathematical Physical and Engineering Sciences, 460 (2049). pp. 2725-2735.

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Abstract

Inspired by the observation that many naturally occurring adhesives arise as texturedthin films, we consider the displacement-controlled peeling of a flexible plate from an incision-patterned thin adhesive elastic layer. We find that crack initiation from an incision on the film occurs at a load much higher than that required to propagate it on a smooth adhesive surface; multiple incisions thus cause the crack to propagate intermittently. Microscopically, this mode of crack initiation and propagation in geometrically confined thin adhesive films is related to the nucleation of cavitation bubbles behind the incision which must grow and coalesce before a viable crack propagates. Our theoretical analysis allows us to rationalize these experimental observations qualitatively and quantitatively and suggests a simple design criterion for increasing the interfacial fracture toughness of adhesive films.

Item Type:	Journal Article
Publication:	Proceedings of the Royal Society of London Series A-Mathematical Physical and Engineering Sciences
Publisher:	The Royal Society
Additional Information:	Copyright for this article belongs to The Royal Society.
Keywords:	Patterned elastic film;Interfacial fracture toughness;Adhesion
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	20 Nov 2007
Last Modified:	19 Sep 2010 04:16
URI:	http://eprints.iisc.ac.in/id/eprint/2169

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