Raymond W. Snidle
Ray Snidle is a (semi-retired) professor of mechanical engineering at Cardiff University where he contributes to the tribology and contact mechanics research group. A chartered engineer and Fellow of both IMechE and ASME, he holds PhD and DSc degrees from Leicester University prior to his obtained industrial experience at Rolls-Royce Aircraft Engines, Bristol. His dominant research interests are in the field of the tribology of gear tooth contacts, with particular emphasis on the failure of elastohydrodynamic lubrication (EHL) leading to scuffing and micropitting. (Bio last updated 2016-08-01 Contact Randy Stott, Managing Editor, with changes.)
Articles by Raymond W. Snidle
- Transient EHL Analysis of Helical Gears (August 2016)
This paper addresses the lubrication of helical gears - especially those factors influencing lubricant film thickness and pressure. Contact between gear teeth is protected by the elastohydrodynamic lubrication (EHL) mechanism that occurs between nonconforming contact when pressure is high enough to cause large increases in lubricant viscosity due to the pressure-viscosity effect, and changes of component shape due to elastic deflection. Acting together, these effects lead to oil films that are stiff enough to separate the contacting surfaces and thus prevent significant metal-to-metal contact occurring in a well-designed gear pair.