WIT Press


The Contact Mechanics Of Cellular Materials: Sealing Power Of Cork Stoppers

Price

Free (open access)

Paper DOI

10.2495/CON990351

Volume

24

Pages

11

Published

1999

Size

1,030 kb

Author(s)

M.E. Rosa, R. Colago, M.F. Vaz and M.A. Fortes

Abstract

The contact of a cellular solid with a compact counter-surface can be analysed at various scales down to the scale of cellular dimensions. Based on a simple model of the surface topography, we derive an equation for the contact area fraction as a function of the applied compressive stress, which takes into account the collapse of the cells. We then discuss the sealing power of bottle corks and show that a perfect seal implies a contact area fraction of about 65%. The strain (and stress) in the stopper required to achieve this condition is estimated and compared to experimental results. 1 Introduction This paper is concerned with the interplay between sealing power and the mechanics of static contact of two solid surfaces. A perfect seal is achieved

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