Pre-tension generates strongly reversible adhesion of a spatula pad on substrate
- 18 September 2008
- journal article
- Published by The Royal Society in Journal of The Royal Society Interface
- Vol. 6 (35), 529-537
- https://doi.org/10.1098/rsif.2008.0322
Abstract
Motivated by recent studies on reversible adhesion mechanisms of geckos and insects, we investigate the effect of pre-tension on the orientation-dependent adhesion strength of an elastic tape adhering on a substrate. Our analysis shows that the pre-tension can significantly increase the peel-off force at small peeling angles while decreasing it at large peeling angles, leading to a strongly reversible adhesion. More interestingly, we find that there exists a critical value of pre-tension beyond which the peel-off force plunges to zero at a force-independent critical peeling angle. We further show that the level of pre-tension required for such force-independent detachment at a critical angle can be induced by simply dragging a spatula pad along a substrate at sufficiently low angles. These results provide a feasible explanation of relevant experimental observations on gecko adhesion and suggest possible strategies to design strongly reversible adhesives via pre-tension.Keywords
This publication has 36 references indexed in Scilit:
- Sliding-induced adhesion of stiff polymer microfibre arrays. II. Microscale behaviourJournal of The Royal Society Interface, 2008
- Phylogenetic analysis of the scaling of wet and dry biological fibrillar adhesivesProceedings of the National Academy of Sciences of the United States of America, 2007
- The adhesion model considering capillarity for gecko attachment systemJournal of The Royal Society Interface, 2007
- Frictional and elastic energy in gecko adhesive detachmentJournal of The Royal Society Interface, 2007
- Ancestrally high elastic modulus of gecko setal β-keratinJournal of The Royal Society Interface, 2007
- Adhesion and friction in gecko toe attachment and detachmentProceedings of the National Academy of Sciences of the United States of America, 2006
- Resolving the nanoscale adhesion of individual gecko spatulae by atomic force microscopyBiology Letters, 2005
- Design of biomimetic fibrillar interfaces: 2. Mechanics of enhanced adhesionJournal of The Royal Society Interface, 2004
- A review of the determination of energy release rates for strips in tension and bending. Part I – static solutionsThe Journal of Strain Analysis for Engineering Design, 1993
- Elastic Fracture Mechanics of the Peel-Test GeometryThe Journal of Adhesion, 1992