TRACTION IN A SIMULATED EHD ROLLER RING CONTACT

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 1993

Autores

seabra, j (Autor) FEUP; sottomayor, a (Autor) Outra; campos, a (Autor) Outra

Ata de Conferência Internacional

Título: THIN FILMS IN TRIBOLOGY

Páginas: 215-225

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

LEEDS, ENGLAND, SEP 08-11, 1992

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 0 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia mecânica

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11