Durability Airworthiness Verification Connotation Analysis and Compliance Method Investigation for Turbine Blade

Abstract

The durability airworthiness verification of turbine blade is one key issue in the process of certifying a type certificate for the aircraft engine. This paper summarizes the limiting factors for turbine blade durability and proposes a compliance method to evaluate the durability life of turbine blade. The typical standards of blade durability were selected and evolution history of the regulations was traced. The regulation contents and differences between CCAR-33 and CS-E were analyzed. A series of compliance methods in airworthiness verification process were discussed in detail. Furthermore, an experimental compliance methodology was proposed to estimate the durability life of turbine blade, considering the damage of creep and fatigue. The novel methodology was verified using the scanning electron microscope (SEM) analysis. These efforts are of great benefit to support the process of obtaining the final type certificate.