Thermal and non-Newtonian analysis of EHD line contacts

• Type: Article in International Scientific Journal
• Date: 1995

Authors

seabra, j (Author) FEUP; sottomayor, a (Author) Other; campos, a (Author) Other; ferreira, l (Author) FEUP

Journal

Title: Tribology Series

Vol. 30

Pages: 229-247

ISSN: 0167-8922

Publisher: Elsevier B.V.

Indexing

ISI Web of Knowledge

Scopus - 1 Citation

Other information

Authenticus ID: P-007-K3W

DOI: 10.1016/s0167-8922(08)70633-3

Abstract (EN): This work deals with the analysis of elastohydrodynamic line contacts. The analysis presented takes into account some important aspects of the problem like the rheological and thermal behaviour of the lubricant. The numerical solution of this problem might be rather complex because of the several phenomena involved. Thus a simple model was developed. The lubricant non-Newtonian behaviour, considering the "Limiting Shear Stress Model", and the thermal exchanges between the lubricant and the contacting solids, are considered. This allows the evaluation of the tangential tractions in the lubricant film, and the lubricant and surface temperatures, with which a local apparent viscosity can be defined. This local viscosity depends on the major contact parameters like the applied load, the kinematic (rolling and sliding), the local pressure and temperature, as well as the lubricant rheology. The results presented show the influence of the operating conditions applied to the contact on the tangential pressure, friction coefficient and temperature distributions.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 19