Finite Element Analysis of Thermal Fatigue in Thermal Barrier CoatingsU. Bardi, C. Borri, A. Fossati, A. Lavacchi, and I. Perissi
Dipartimento di Chimica, Università degli Studi di Firenze, Sesto Fiorentino, FI, Italy
A Finite element model of plasma sprayed TBC’s was developed to estimate the stress induced by thermal cycling experiments. A heat transfer analysis was performed to evaluate the temperature distribution on the specimen during the cooling under an impinging air jet; temperature measurements performed with an infrared pyrometer on the cooled samples show good agreement with the evaluated data. These results were then integrated in a structural mechanic model as thermal load. The COMSOL Multiphysics® Thermal-Structural interaction model allowed to determine the dependence of the stress on the temperature fields.