A Mathematical Model of Spalling Fatigue Failure in Rolling Contact
- 1 January 1969
- journal article
- research article
- Published by Taylor & Francis in A S L E Transactions
- Vol. 12 (2), 106-116
- https://doi.org/10.1080/05698196908972252
Abstract
Variables affecting the fatigue life of a rolling contact are identified. A mathematical model of sub-surface and surface crack propagation is presented. The life to failure of volume elements in the vicinity of a defect (defect life) is formulated. A term “severity” of a microdefect has been defined. The model is characterized by the inclusion of bulk material parameters, defect characteristics and parameters of geometry, stress, lubrication and surface topography. A statistical expression for the life of an entire rolling body is based on the defect life formula. The new model comprises current standard bearing life prediction formulas as a special case.Keywords
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