Effect of Slide-to-Roll Ratio on Interior Stresses Around a Dent in EHL Contacts

Autor:	Xiaolan Ai, Si C. Lee
Rok vydání:	1996
Předmět:	Leading edge Materials science Mechanical Engineering Surfaces and Interfaces Mechanics Surfaces Coatings and Films Stress field Contact fatigue Mechanics of Materials Indentation Lubrication Forensic engineering Trailing edge Boundary lubrication Stress concentration
Zdroj:	Tribology Transactions. 39:881-889
ISSN:	1547-397X 1040-2004
DOI:	10.1080/10402009608983608
Popis:	The present, study extends the transient EHL point contact model and subsurface stress field calculation model to examine the influence of a surface dent on interior stresses in an EHL point contact under various slide-to-roll conditions. Results revealed that under the pure rolling condition the effect of a surface dent on the stresses is quite negligible. The presence of a shallow surface dent is unlikely to reduce the contact fatigue, life so long as pure rolling motion and good lubrication conditions are maintained. Unfortunately, the same cannot be said of the contact if it is operating in the boundary lubrication regime. When sliding was introduced, the surface indentation generated significantly high pressure spikes with a strong directional preference. These high-pressure spikes cause severe stress concentrations either below the trailing edge of the dent, if it moves faster than the opposing surface, or below the leading edge of the dent, if it moves slower than the opposing surface. The maximum ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2ddb3e99ce407451f26f86d133ecc9ca https://doi.org/10.1080/10402009608983608 Zobrazit plný text záznamu