Thermoelastic Distortion of EHD Line Contacts During the Passage of Soft Debris Particles
Author:
Nikas G. K.1, Sayles R. S.1, Ioannides E.1
Affiliation:
1. Mechanical Engineering Department, Imperial College of Science, Technology, and Medicine, South Kensington, London SW72BX, England
Abstract
During the passage of a debris particle through an EHD contact, mechanical stresses due to particle compression and thermal stresses due to particle frictional heating produce a thermoelastic/plastic stress field, which governs the way a possible damage is generated. In the present paper, the complete three-dimensional solution of the thermoelastic distortion of surfaces due to the compression of a soft, ductile debris particle in an EHD line contact is presented both theoretically and through a realistic example. It is found that thermal stresses increase the likelihood of yielding and produce a characteristic “omega” shaped thermoelastic displacement. The important outcome of this work is the construction of a map which shows the critical particle size to cause damage (plastic deformations) in combination with operational parameters as the lubricant film thickness and relative sliding velocity of the contact.
Publisher
ASME International
Subject
Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials
Reference12 articles.
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J. N.
, 1937, “On the Integration of the Thermoelastic Equations,” Philosophical Masazine. Series 7, Vol. 23, pp. 1017–1032.
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