Wear Simulation with a Focus on Mild Wear in Rolling and Sliding Contacts
2011 (English)In: Friction, wear and wear protection: International Symposium on Friction, Wear and Wear Protection 2008, Aachen, German, 2011, 1-19 p.Conference paper (Refereed)
The amount of wear occurring in high-performance rolling and sliding contacts is often quite small, and such contact surfaces often become glossy. To obtain good contact conditions, it is necessary that the form and the topography of the surfaces be good, that the materials and treatments be properly chosen, and that the lubrication be adequate for the contact. Such advantageous conditions - often referred to as 'mild' - are what engineers normally strive to attain. Sometimes severe conditions may arise, however, creating rough or scored surfaces; severe wear conditions are normally unacceptable in any modern high-performance machine. Predicting the amount of mild wear is generally thought to be rather difficult and uncertain; this paper addresses this difficult task, outlining some possibilities for predicting mild wear in rolling and sliding contacts. Typical machine elements that include high-performance rolling and sliding contact surfaces are gears, cam mechanisms, and roller bearings. If the rolling and sliding contacts are moving under boundary or mixed lubricated conditions, the contact surfaces may be subject to mild wear. If the lubricants in the rolling and sliding contacts are contaminated with particles, wear may occur even if full-film conditions are predominant. In a rolling and sliding contact, the two interacting surfaces characteristically move at different speeds in a tangential direction. The Tribology Group at KTH Machine Design has worked on simulating wear in rolling and sliding contacts for a fairly long time. Themodelling principles the Group has successfully used are based on 1) the single-point observation method and 2) treating wear as an initial-value process. Two simple examples will be presented here, demonstrating how these principles can be used. As well, some of the Group's efforts at simulating mild wear in rolling and sliding contacts will be presented.
Place, publisher, year, edition, pages
2011. 1-19 p.
Rolling contacts, Sliding contacts, Wear simulation
IdentifiersURN: urn:nbn:se:kth:diva-148765DOI: 10.1002/9783527628513.ch1ScopusID: 2-s2.0-84885567486ISBN: 9783527323661OAI: oai:DiVA.org:kth-148765DiVA: diva2:737384
International Symposium on Friction, Wear and Wear Protection 2008. Aachen, Germany. 9-11 April 2008
QC 201408122014-08-122014-08-112014-08-12Bibliographically approved