Imperial College London
Portrait Picture

ProfessorHughSpikes

Faculty of Engineering, Department of Mechanical Engineering

Professor
 
 
 
//

Contact

 

+44 (0)20 7594 7063h.spikes

 
 
//

Assistant

 

Mrs Chrissy Stevens +44 (0)20 7594 7064

 
//

Location

 

673City and Guilds BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Guegan:2015:10.1007/s11249-015-0549-7,
author = {Guegan, J and Kadiric, A and Spikes, HA},
doi = {10.1007/s11249-015-0549-7},
journal = {Tribology Letters},
title = {A Study of the Lubrication of EHL Point Contact in the Presence of Longitudinal Roughness},
url = {http://dx.doi.org/10.1007/s11249-015-0549-7},
volume = {59},
year = {2015}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - This work investigates the effect on elastohydrodynamic lubrication of roughness ridges oriented along the rolling–sliding direction, such as may be present on rolling bearing raceways. The roughness of the three specimens tested is characterised by the RMS of surface heights and a dominant wavelength. Optical interferometry and a ball-on-disc set-up were employed to map the oil film thickness. The paper first describes a novel procedure to carry out optical interferometry measurements on rough surfaces. Film thickness maps from the central part of the contact were obtained for a range of speeds in pure rolling and rolling–sliding conditions. The evolution of the film distribution with increasing speed along with the in-contact RMS and the real area of contact was calculated. The film maps show that the lift-off speed increases when roughness is introduced compared with smooth surfaces, while the average film thickness remains very close to the smooth case. The general horseshoe film shape that becomes visible at higher speeds is discussed. Using an inverse solution approach based on measured in-contact roughness, the pressure distribution is estimated in a rough, lubricated contact and its evolution with speed is explained. The findings provide important insights into the transition from boundary, through mixed, to full EHL lubrication for longitudinal roughness.
AU  - Guegan,J
AU  - Kadiric,A
AU  - Spikes,HA
DO  - 10.1007/s11249-015-0549-7
PY  - 2015///
SN  - 1023-8883
TI  - A Study of the Lubrication of EHL Point Contact in the Presence of Longitudinal Roughness
T2  - Tribology Letters
UR  - http://dx.doi.org/10.1007/s11249-015-0549-7
UR  - http://hdl.handle.net/10044/1/23245
VL  - 59
ER  -
Download