Peeling from a patterned thin elastic film

Abstract

Inspired by the observation that many naturally occurring adhesives arise as textured thin 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.

8 pages, To appear in Proceedings of Royal Society London, Ser. A

Cited by in corpus (7)

• Adhesion Induced Instabilities and Pattern Formation in Thin Films of Elastomers and Gels
• Coupled effects of applied load and surface structure on the viscous forces during peeling
• Angle-independent optimal adhesion in plane peeling of thin elastic films at large surface roughnesses
• Formation of a hard surface layer during drying of a heated porous media
• How a Blister Heals
• Debonding of a soft adhesive fibril in contact with an elastomeric pillar
• Effect of the density of pillar-patterned substrates on the contact mechanics: Transition from top to mixed contact with a detailed pressure-field description