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Advances in Tribology
Volume 2012, Article ID 412190, 12 pages
Research Article

A Two-Scale Approach for Lubricated Soft-Contact Modeling: An Application to Lip-Seal Geometry

1DII, Universitá del Salento, 73100 Monteroni di Lecce, Italy
2DMMM, Politecnico di Bari, 70126 Bari, Italy

Received 31 May 2012; Revised 15 September 2012; Accepted 19 September 2012

Academic Editor: Michel Fillon

Copyright © 2012 Michele Scaraggi and Giuseppe Carbone. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We consider the case of soft contacts in mixed lubrication conditions. We develop a novel, two scales contact algorithm in which the fluid- and asperity-asperity interactions are modeled within a deterministic or statistic scheme depending on the length scale at which those interactions are observed. In particular, the effects of large-scale roughness are deterministically calculated, whereas those of small-scale roughness are included by solving the corresponding homogenized problem. The contact scheme is then applied to the modeling of dynamic seals. The main advantage of the approach is the tunable compromise between the high-computing demanding characteristics of deterministic calculations and the much lower computing requirements of the homogenized solutions.