Fatigue Failure Progression in Ball Bearings

[+] Author and Article Information
Michael N. Kotzalas

Applied Research Laboratory, The Pennsylvania State University, University Park, PA 16802

Tedric A. Harris

Mechanical Engineering Department, The Pennsylvania State University, University Park, PA 16802

J. Tribol 123(2), 238-242 (Mar 09, 2000) (5 pages) doi:10.1115/1.1308013 History: Received September 09, 1999; Revised March 09, 2000
Copyright © 2001 by ASME
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Ball bearing raceway with fatigue spall
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Ball with progressed fatigue spall
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Schematic drawing of ball/v-ring endurance test rig (developed by Pratt & Whitney Aircraft Division, United Technologies Corporation)
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Schematic of ball in the groove of a v-ring
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Scaled accelerometer signal and spall size as a function of time
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Film thickness distribution over a spalled contact for dimensionless velocity=1.683×10−12, dimensionless material parameter=4522, dimensionless load=1.106×10−7, and contact aspect ratio=1.25
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Predicted spall progression times for 90 percent survivability versus time




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