Fluid entrapment by a soft surface layer

The paper describes some of a series of experiments on the normal approach of a sphere towards a flat surface, with the space between occupied by a liquid lubricant. In the novel experiments the flat surface is covered by a thin layer of low-modulus, rubbery solid. Even under extremely light loads,...

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Bibliographic Details
Published in:Wear 1974-01, Vol.28 (3), p.345-352
Main Authors: Gaman, I.D.C., Higginson, G.R., Norman, R.
Format: Article
Language:English
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Summary:The paper describes some of a series of experiments on the normal approach of a sphere towards a flat surface, with the space between occupied by a liquid lubricant. In the novel experiments the flat surface is covered by a thin layer of low-modulus, rubbery solid. Even under extremely light loads, the approach of the solids is dominated by entrapment of a pool of lubricant in the central region. For comparison, control experiments are conducted without the soft layer at loads low enough for the solids to be regarded as rigid. The effect of the soft layer is to increase the closure time by several orders of magnitude.
ISSN:0043-1648
1873-2577
DOI:10.1016/0043-1648(74)90191-4