..., P ei = bu s /(2 k i ), and k i is the thermal diffusivity of two meshing interfaces. q is the average heat of tooth surface under the mixed EHL state, which is composed of heat q a generated by asperities contact and heat q h generated by lubricating oil shear. The calculation...

... 2021 08 02 2022 mixed EHL low sliding ratio involute gear lubrication characteristics elastohydrodynamic lubrication films gears surface roughness and asperities With the development of aviation industry to high precision and light weight, higher requirements have been placed...

... by Chittenden et al. [ 24 ] can be used to predict the trend of film thickness variation only in a light loading environment in which the formulae were originally developed. In order to demonstrate the capability of the present model for simulating mixed EHL in a wide range of operating conditions, more...

... . 10.1115/1.3261081 [26] Epstein , D. , Yu , T. H. , Wang , Q. , Keer , L. M. , Cheng , H. S. , Liu , S. , Harris , S. , and Gangopadhyay , A. , 2003 , “ An Efficient Method of Analyzing the Effect of Roughness on Fatigue Life in Mixed-EHL Contact ,” Tribol. Trans...

... papers for more detailed descriptions. The primary objective of this paper is to numerically simulate the entire transition from the full-film and mixed EHL all the way down to dry contact and to investigate the roughness orientation effect on the lubricant film thickness. A series of cases have been...

... to reduce stress concentration. In the present work, the deterministic mixed EHL model developed previously has been modified to take into account the realistic geometry. Sample cases have been analyzed to investigate the effects of contact length, crowning, and end corners (or chamfers) on the EHL film...

... and challenging field of research since the 1950s. Significant breakthroughs achieved in the last 10–15 years are largely in the area of mixed EHL, in which surface asperity contact and hydrodynamic lubricant film coexist. Mixed EHL is of the utmost importance not only because most power-transmitting components...

... profiles. A unified numerical approach is adapted for handling asperity interaction in mixed EHL conditions. The differences between the transient and discrete EHL analyses are shown for a spur gear pair having smooth surfaces and different tooth profile modifications. The transient behavior predicted...