A Theoretical Study of Residual Stress Effects on Fatigue Life Prediction

Recently, the trend has been toward the use of the full subsurface stress field in rolling element bearing fatigue life prediction (stress field-based life models). By using the stress field-based bearing life models, more accurate assessments of such things as fitting practice and thermal treatment...

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Bibliographic Details
Published in:Tribology transactions 2001-01, Vol.44 (4), p.609-614
Main Author: Kotzalas, Michael N.
Format: Article
Language:English
Subjects:
Applied sciences
Bearings, bushings, rolling bearings
Condensed matter: structure, mechanical and thermal properties
Drives
Exact sciences and technology
Fatigue, brittleness, fracture, and cracks
Fundamental areas of phenomenology (including applications)
Mechanical and acoustical properties of condensed matter
Mechanical contact (friction...)
Mechanical engineering. Machine design
Mechanical properties of solids
Physics
Rolling Contact Fatigue
Rolling Element Bearings
Solid mechanics
Structural and continuum mechanics
Tribology and mechanical contacts
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Summary:Recently, the trend has been toward the use of the full subsurface stress field in rolling element bearing fatigue life prediction (stress field-based life models). By using the stress field-based bearing life models, more accurate assessments of such things as fitting practice and thermal treatments on the bearing performance are achieved. However, one aspect missing in most models has been the consideration of the changing residual stress during operation of the bearing. This study was conducted to investigate the time dependent residual stress on contact fatigue life predictions. This study concluded that the changes in residual stress during operation were most likely a fatigue reaction of the material to the pre-fatigue residual stress and cyclic contact stress fields. The materials fatigue response changes the instantaneous values of the material constants in most stress field-based life equations, thus making them in-calculable. As such, the pre-fatigue residual stress field should be used in the stress field-based models. Presented as a Society of Tribologists and Lubrication Engineers Paper at the STLE/ASME Tribology Conference in San Francisco, CA October 21-24, 2001
ISSN:1040-2004
1547-397X
DOI:10.1080/10402000108982502