The Origins Of White Etching Cracks And Their Significance To Rolling Bearing Failures
A new theory for premature failures in wind turbine bearing steel is proposed, an experimental study is presented as validation of the theory
Date : 01/02/2019
Highlights A specific stress sequence causes both WECs and unpredictable failures concurrently. WECs are a symptom of this stress history and not a direct cause of failure. The relevant stress history consists of early short-lived high stress, followed by prolonged moderate stress. Damage potential of this stress history is not accounted for by Palmgren-Miner rule, hence the `upredictable` failure lifetimes. No specific oil chemistry, SRR or frictional energy are required to form WECs.
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