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

Paper #:
  • 2010-01-0200

Published:
  • 2010-04-12
Citation:
Benson, R. and Sadhneni, R., "Fatigue Based Damage Analysis with Correlation to Customer Duty Cycle Using Design Reliability and Confidence," SAE Technical Paper 2010-01-0200, 2010, https://doi.org/10.4271/2010-01-0200.
Pages:
7
Abstract:
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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