Tearing as a test for mechanical characterization of thin adhesive films
- 30 March 2008
- journal article
- Published by Springer Science and Business Media LLC in Nature Materials
- Vol. 7 (5), 386-390
- https://doi.org/10.1038/nmat2161
Abstract
Thin adhesive films have become increasingly important in applications involving packaging, coating or for advertising. Once a film is adhered to a substrate, flaps can be detached by tearing and peeling, but they narrow and collapse in pointy shapes. Similar geometries are observed when peeling ultrathin films grown or deposited on a solid substrate, or skinning the natural protective cover of a ripe fruit. Here, we show that the detached flaps have perfect triangular shapes with a well-defined vertex angle; this is a signature of the conversion of bending energy into surface energy of fracture and adhesion. In particular, this triangular shape of the tear encodes the mechanical parameters related to these three forms of energy and could form the basis of a quantitative assay for the mechanical characterization of thin adhesive films, nanofilms deposited on substrates or fruit skin.Keywords
This publication has 13 references indexed in Scilit:
- Stress focusing in elastic sheetsReviews of Modern Physics, 2007
- Cracks in Thin Sheets: When Geometry Rules the Fracture PathPhysical Review Letters, 2005
- Dynamics of stick-slip in peeling of an adhesive tapePhysical Review E, 2004
- A buckling-based metrology for measuring the elastic moduli of polymeric thin filmsNature Materials, 2004
- Crack Street: The Cycloidal Wake of a Cylinder Tearing through a Thin SheetPhysical Review Letters, 2003
- Geometry and Physics of WrinklingPhysical Review Letters, 2003
- Nonlinear dynamics and breakup of free-surface flowsReviews of Modern Physics, 1997
- Deterministic Chaos in Failure Dynamics: Dynamics of Peeling of Adhesive TapePhysical Review Letters, 1995
- The cellular basis of olfactionEndeavour, 1994
- Thin-film peeling-the elastic termJournal of Physics D: Applied Physics, 1975