Results 151 to 160 of about 1,846,052 (196)

A Generalized Thermal EHL Model for Point Contact Problems

STLE/ASME 2008 International Joint Tribology Conference, 2008
A generalized thermal elastohydrodynamic lubrication (TEHL) model for point contact problems is developed based on an isothermal generalized Newtonian elastohydrodynamic (EHL) model recently developed. The thermal model couples FDM for lubricant energy equation and the DC-FFT method for surface temperature integration.
Yuchuan Liu, Q. Jang Wang, Dong Zhu, Fanghui Shi   +3 more
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Thermal EHL Analyses of Point Contacts With Surface Roughness

World Tribology Congress III, Volume 1, 2005
The Newtonian thermal EHL analyses of point contacts with two-sided surface roughness have been performed under pure rolling, sliding/rolling and simple sliding conditions. Thermal results are compared with isothermal ones. It has been found that the sliding motion produces high temperature rise and reduces the film thickness greatly.
J. Wang, P. Yang, M. Kaneta
openaire   +1 more source

An Investigation into Grease Behavior in Thermal EHL Circular Contacts

Tribology Transactions, 2006
The behaviors of two lithium lubricating greases were investigated under EHL circular contact through measurements of traction coefficients on a self-made rig in which the contact was continuously fed with fresh grease. The average values of Erying shear stress and shear modulus of the two lithium greases were obtained from traction experimental data ...
YANSHUANG WANG, BOYUAN YANG
openaire   +1 more source

The Effect of Starvation on a Thermal Mixed EHL Line Contact

Volume 10: 2019 International Power Transmission and Gearing Conference, 2019
Abstract To investigate the effect of the inlet starvation severity on the flash temperature, which dictates the scuffing failure, a thermal mixed elastohydrodynamic lubrication model is developed for line contacts operating under the starved lubrication condition.
Sheng Li, Danielle Masse
openaire   +1 more source

Thermal EHL Analysis of Circular Contacts With Measured Surface Roughness

Journal of Tribology, 1996
Abstract Time dependent thermal EHL circular contact results with measured surface roughness were obtained to analyze the effects of roughness on pressure, film thickness, temperature, and coefficient of friction. Both contact surfaces are considered to be rough.
Gang Xu, Farshid Sadeghi
openaire   +1 more source

Effects of Thermal Conductivity of Contacting Surfaces on Point EHL Contacts

Journal of Tribology, 2003
With actual and virtual materials, the effects of the thermal conductivity of contacting surfaces on EHL are investigated through experimental analyses using the optical interferometry technique and the Newtonian thermal EHL analyses in consideration of the variation of oil properties in all directions within the film. A mineral bright stock is used as
M. Kaneta, P. Yang
openaire   +1 more source

A Parametric Analysis of the Thermal Shear Localization in EHL Films

World Tribology Congress III, Volume 1, 2005
Experiments and computer simulations [1] have revealed some unusual results of elastohydrodynamic lubrication (EHL) associated with a high degree of thermally induced inhomogeneous shear across the lubricant film, or thermal shear localization. The results include the development of a sizable film dimple in the central EHL region [2] and a dramatic ...
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Investigation on Thermal Distress and Scuffing Failure Under Micro EHL Conditions

2006
Scuffing is a degenerative form of adhesive wear caused by local welding between mating surfaces. Classical methods for scuffing prediction indicate the surface temperature rise (flash temperature) due to friction generated heat as the most important index to assess the risk of scuffing. Nowadays numerical analyses constitute a useful tool to provide a
A. POLACCO, G. PUGLIESE, CIULLI, ENRICO, G. M. BRAGALLINI, M. FACCHINI   +4 more
openaire   +2 more sources

Study on the Micro Thermal EHL Behavior of Wind Turbine Gearbox

Applied Mechanics and Materials, 2011
A complete numerical solution for the micro thermal elastohydrodynamic lubrication (EHL) of planetary gearing in wind turbine gearbox is obtained with taking roughness effects and characteristics of non-Newtonian fluids into account. The oil film pressure profile, film shape and the trend of equivalent temperature rise in planetary gearing in special ...
Bin Wu, Wan Kai Shi, Long Zhao, Ping Fu
openaire   +1 more source

Thermal EHL Analysis of Cylindrical Roller Under Heavy Load

2006
Full numerical solutions to finite line contact elastohydrodynamic lubrication (EHL) problems are presented. Using the multi-level multi-integration (MLMI) method and some dedicated numerical techniques, convergence has been obtained for severe working conditions (contact pressure can reach 1.0 GPa and the length-width ratio of contact area are over ...
Haoyang Sun, Xiaoyang Chen
openaire   +1 more source