A clamped circular film is adhered to a rigid cylindrical punch. An external force pulls the punch away causing delamination at the punch-plate interface. The deflections of the film are discussed for a range of film thickness and stiffness, detailing the continuous transition from a plate under bending to a membrane under stretching. An equilibrium theory of delamination mechanics is derived based on an energy balance. A complete separation at the punch-film interface, or the “pull-off” event, is predicted when the contact circle shrinks to approximately 0.18 of the film diameter. The values and trends, presented in dimensionless normalized form here, should have implications in biological and colloidal sciences in relation to thin-walled capsules and in electronics in relation to thin encapsulating films.
Adherence of an Axisymmetric Flat Punch Onto a Clamped Circular Plate: Transition From a Rigid Plate to a Flexible Membrane
Contributed by the Applied Mechanics Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF APPLIED MECHANICS. Manuscript received by the ASME Applied Mechanics Division, February 12, 2001; final revision, October 15, 2001. Associate Editor: K. Ravi-Chandar. Discussion on the paper should be addressed to the Editor, Prof. Lewis T. Wheeler, Department of Mechanical Engineering, University of Houston, Houston, TX 77204-4792, and will be accepted until four months after final publication of the paper itself in the ASME JOURNAL OF APPLIED MECHANICS.
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Wan, K. (October 15, 2001). "Adherence of an Axisymmetric Flat Punch Onto a Clamped Circular Plate: Transition From a Rigid Plate to a Flexible Membrane ." ASME. J. Appl. Mech. March 2002; 69(2): 110–116. https://doi.org/10.1115/1.1433477
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