Time-dependent fluid squeeze-out between solids with rough surfaces |
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Authors: | B Lorenz and B N J Persson |
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Institution: | (1) Bridgestone/Firestone Research, LLC, 1200 Firestone Parkway, Akron, OH 44317-0001, USA |
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Abstract: | We study the time dependency of the (average) interfacial separation between an elastic solid with a flat surface and a rigid
solid with a randomly rough surface, squeezed together in a fluid. As an application we discuss fluid squeeze-out between
a tire tread block and a road surface. Some implications for the leakage of seals are discussed, and experimental results
are presented to test the theory. The theoretical prediction for the leak rate as a function of the fluid pressure difference
is in good agreement with the experimental data for all fluid pressures up to “lift-off”, where the fluid pressure equals
the nominal rubber-substrate squeezing pressure. |
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