ar X iv : 0 80 3 . 07 12 v 2 [ co nd - m at . s of t ] 1 7 Se p 20 08 The Liquid Blister Test
نویسندگان
چکیده
We consider a thin elastic sheet adhering to a stiff substrate by means of the surface tension of a thin liquid layer. Debonding is initiated by imposing a vertical displacement at the centre of the sheet and leads to the formation of a delaminated region, or ‘blister’. This experiment reveals that the perimeter of the blister takes one of three different forms depending on the vertical displacement imposed. As this displacement is increased, we observe first circular, then undulating and finally triangular blisters. We obtain theoretical predictions for the observed features of each of these three families of blisters. The theory is built upon the Föppl-von Kármán equations for thin elastic plates and accounts for the surface energy of the liquid. We find good quantitative agreement between our theoretical predictions and experimental results, demonstrating that all three families are governed by different balances between elastic and capillary forces. Our results may bear on micrometric tapered devices and other systems where elastic and adhesive forces are in competition.
منابع مشابه
ar X iv : 0 80 3 . 07 12 v 1 [ co nd - m at . s of t ] 5 M ar 2 00 8 The Liquid Blister Test
We consider a thin elastic sheet adhering to a stiff substrate by means of the surface tension of a thin liquid layer. Debonding is initiated by imposing a vertical displacement at the centre of the sheet and leads to the formation of a delaminated region, or ‘blister’. This experiment reveals that the perimeter of the blister takes one of three different forms depending on the vertical displac...
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F. Kun, H. A. Carmona, J. S. Andrade Jr., and H. J. Herrmann Department of Theoretical Physics, University of Debrecen, P. O. Box:5, H-4010 Debrecen, Hungary 2 Computational Physics, IfB, HIF, E12, ETH, Hönggerberg, 8093 Zürich, Switzerland 3 Centro de Ciências e Tecnologia, Universidade Estadual do Ceará, 60740-903 Fortaleza, Ceará, Brazil 4 Departamento de F́ısica, Universidade Federal do Cear...
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