Fatigue Based Damage Analysis with Correlation to Customer Duty Cycle Using Design Reliability and Confidence

Robert Benson; Ramesh Sadhneni

doi:10.4271/2010-01-0200

2010-04-12

Fatigue Based Damage Analysis with Correlation to Customer Duty Cycle Using Design Reliability and Confidence 2010-01-0200

This paper will define the process for correlating fatigue based customer duty cycle with laboratory bench test data. The process includes the development of the Median and Design Load-Life curve equations. The Median Load-Life curve is a best fit linear regression; whereas, the Design Load-Life curve incorporates component specific reliability and confidence targets. To account for the statistical distribution of fatigue life, due to sample size, the one-side lower-bound tolerance limit method ( Lieberman, 1958 ) will be utilized. This paper will include a correlation between the predicted design fatigue life and the actual product life.

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Fatigue Based Damage Analysis with Correlation to Customer Duty Cycle Using Design Reliability and Confidence 2010-01-0200

SAE MOBILUS