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Time-Dependent Fluid Squeeze-Out Between Soft Elastic Solids with Randomly Rough Surfaces

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Abstract

We study the time dependency of the interfacial separation and of the area of real contact between a soft elastic cylinder and a rigid solid with a randomly rough surface, squeezed with normal approach in a fluid. This problem is relevant for biological, as well as for bio-medical, seals and tires applications. An ad-hoc numerical scheme is developed to solve the transient mixed-EHD homogenized lubrication problem. We show that, for the soft contact case, the transition from the EHD to the boundary regime can be much more efficiently studied within a simplified (Grubin-like) problem formulation then with the full numerical scheme. This is not only of great conceptional importance, but also of practical importance as the latter calculation is much simpler and faster than the full scheme calculation.

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Authors and Affiliations

  1. DII, Universitá del Salento, 73047, Monteroni-Lecce, Italy

    M. Scaraggi

  2. IFF, FZ Jülich, 52425, Jülich, Germany

    B. N. J. Persson

Authors
  1. M. Scaraggi
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  2. B. N. J. Persson
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Correspondence to B. N. J. Persson.

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Scaraggi, M., Persson, B.N.J. Time-Dependent Fluid Squeeze-Out Between Soft Elastic Solids with Randomly Rough Surfaces. Tribol Lett 47, 409–416 (2012). https://doi.org/10.1007/s11249-012-9996-6

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  • DOI: https://doi.org/10.1007/s11249-012-9996-6

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