Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2019 - September 11, 2019
Thermal barrier coating (TBC) applied to turbine blades indicates unique deformation and fracture behaviors due to the microstructure which is characterized by deposition of molten particles. In this study, in order to accurately simulate these behaviors, the finite element analysis model based on the brick model combined with cohesive model and the inelastic constitutive equation was established. Bending tests of freestanding YSZ sample specimens extracted from TBC-coated sample deposited under different particle velocity conditions were also performed to identify the deformation and fracture behaviors. As the result, bending tests revealed that the maximum load, the maximum deflection, and the crack path varied significantly depending on the particle velocity. In addition, it was confirmed that the established analysis model can accurately simulate these deformation behavior and crack path.
