Abstract
The stochastic fatigue crack growth (FCG) modeling method is established for bolt holes in the turbine disc. Through analyzing the FCG experimental of standard compact tension (CT) specimens, a Wiener process is firstly established based on the failure mechanism to describe the stochastic FCG process, and then extended to the component-like and component level. The accuracy of the established model is verified by the experiments of bolt hole plate (BHP) specimens. Finally, the reliability analysis framework is constructed and verified for the turbine disc with multiple cracks based on the Copula function.
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