Confinement induced instability of thin elastic film

Details Confinement induced instability of thin elastic film Confinement induced instability of thin elastic film

2005-05-02

arxiv.org/abs/cond-mat/0505045v1

Physics

Condensed Matter

Soft Condensed Matter

11 pages, 6 figures

Scientific paper

10.1103/PhysRevE.73.041601

A confined incompressible elastic film does not deform uniformly when subjected to adhesive interfacial stresses but with undulations which have a characteristic wavelength scaling linearly with the thickness of the film. In the classical peel geometry, undulations appear along the contact line below a critical film thickness or below a critical curvature of the plate. Perturbation analysis of the stress equilibrium equations shows that for a critically confined film the total excess energy indeed attains a minima for a finite amplitude of the perturbations which grow with further increase in the confinement.

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