Pre-tension regulates buckling patterns of soft films with interactionsL. H. He and L. Qiao
CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China - Hefei, Anhui 230026, PRC
received 28 March 2007; accepted in final form 7 August 2007; published October 2007
published online 3 September 2007
We study elastic buckling of a uni-axially pre-tensioned soft elastic film in proximity to a rigid contactor due to van der Waals interaction. By a linear analysis, we show that the film will buckle into stripes parallel to the tensile direction, with tunable spacing governed by the magnitude of the pre-tension. Such a regulating effect of pre-tension may find practical applications in generating precise surface patterns.
47.54.-r - Pattern selection; pattern formation.
46.32.+x - Static buckling and instability.
© Europhysics Letters Association 2007