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Effect on interference fits on roller bearing fatigue lifeAn analysis was performed to determine the effects of inner-ring speed and press fits on roller bearing fatigue life. The effects of the resultant hoop and radial stresses on the principal stresses were considered. The maximum shear stresses below the Hertzian contact were determined for different conditions of inner-ring speed and load, and were applied to a conventional roller bearing life analysis. The effect of mean stress was determined using Goodman diagram approach. Hoop stresses caused by press fits and centrifugal force can reduce bearing life by as much as 90 percent. Use of a Goodman diagram predicts life reductions of 20 to 30 percent. The depth of the maximum shear stress remains virtually unchanged.
Document ID
19860010145
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Coe, H. H. (NASA Lewis Research Center Cleveland, OH, United States)
Zaretsky, E. V. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1986
Subject Category
Mechanical Engineering
Report/Patent Number
NASA-TM-87165
E-2516
NAS 1.15:87165
Accession Number
86N19616
Funding Number(s)
PROJECT: RTOP 505-33-7C
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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