TRACTION IN A SIMULATED EHD ROLLER RING CONTACT

• Type: Article in International Conference Proceedings Book
• Date: 1993

Authors

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

Conference proceedings International

Title: THIN FILMS IN TRIBOLOGY

Pages: 215-225

19th Leeds-Lyon Symposium on Tribology: Thin Films in Tribology

LEEDS, ENGLAND, SEP 08-11, 1992

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Scientific classification

FOS: Engineering and technology > Mechanical engineering

Other information

Authenticus ID: P-001-NVM

DOI: 10.1016/s0167-8922(08)70377-8

Abstract (EN): Traction forces are an important parameter in the analysis of an elastohydrodynamic contact problem. This work is about the determination of traction forces and friction coefficients in an EHD roller/ring contact, in a roller bearing. A simulation of the EHD contact is developed, which consists on a waved dry Hertzian contact, separated by a constant film thickness calculated using Dowson's expression, and corrected by a thermal factor. This procedure, although approximated, permits to develop a simple algorithm for the evaluation of the waved pressure distribution and of the waved contact geometry. The results obtained concern the MOBIL Jet II oil, which is considered as a viscoelastic (Ree-Eyring) fluid, whose physical characteristics (viscosity, shear modulus and reference shear stress) are pressure and temperature dependent. The variation of friction and traction with the operating conditions is studied, showing the influence of the rolling and sliding speeds, and the influence of the maximum Hertzian pressure. The influence of the surface waviness of the contacting solids is also analysed, showing how this parameter is important for the traction behaviour of the EHD contact. © 1993.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11