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Effect of Roller Profile on Cylindrical Roller Bearing Life PredictionFour rolling-element bearing life theories were chosen for analysis and compared for a simple roller-race geometry model. The life theories were those of Weibull; Lundberg and Palmgren; Ioannides and Harris; and Zaretsky. The analysis without a fatigue limit of Ioannides and Harris is identical to the Lundberg and Palmgren analysis, and the Weibull analysis is similar to that of Zaretsky if the exponents are chosen to be identical. The resultant predicted life a each stress condition not only depends on the life equation used but also on the Weibull slope assumed. The least variation in predicted life with Weibull slope comes with the Zaretsky equation. Except for a Weibull slope of 1.11, at which the Weibull equation predicts the highest lives, the highest lives are predicted for the Zaretsky equation. For Weibull slopes of 1.5 and 2, both the Lundherg-Palmgren and Ioannides-Harris (where tau(sub u) = 0) equations predict lower lives than the ANSI/ABMA/ISO standard. Based upon the Hertz stresses for line contact, the accepted load-life exponent of 10/3 results in a maximum Hertz stress-life exponent equal to 6.6. This value is inconsistent with that experienced in the field. The assumption of as shear stress fatigue limit tau(sub u) results in Hertz stress-life exponents greater than are experimentally verifiable.
Document ID
20020034126
Acquisition Source
Glenn Research Center
Document Type
Reprint (Version printed in journal)
Authors
Poplawski, Joseph V.
(Poplawski (J. V.) and Associates Bethlehem, PA United States)
Peters, Steven M.
(Poplawski (J. V.) and Associates Bethlehem, PA United States)
Zaretsky, Erwin V.
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
August 20, 2013
Publication Date
January 1, 2001
Publication Information
Publication: Tribology Transactions
Publisher: Society of Tribologists and Lubrication Engineers
Volume: 44
Issue: 3
Subject Category
Mechanical Engineering
Meeting Information
Meeting: 55th Annual Meeting
Location: Nashville, TN
Country: United States
Start Date: May 7, 2001
End Date: May 11, 2001
Sponsors: Society of Tribologists and Lubrication Engineers
Distribution Limits
Public
Copyright
Other

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