Fatigue scatter is an inevitable phenomenon in fatigue tests which influences life prediction for components or system. In aerospace engineering, aircraft and gas turbine engine components are designed based on design curves. To ensure safety and reliability, influence of life and fatigue scatter model uncertainty on design curve construction is analyzed by comparing capability to describe fatigue scatter. Design curve with different models are calculated based on Ti-64 fatigue tests data. In addition, the number of test points is also discussed in this paper. Finally, a new curve design approach based on Bayesian is proposed for small fatigue tests sample, which is more conservative than traditional way.
Influence of life and fatigue scatter model uncertainty on design curve construction
01.07.2016
1481887 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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