Fatigue stress analysis of the DV-2 engine turbine disk

The purpose of this study is to improve life prediction of certain components. Fatigue of the high-stressed structural elements is an essential parameter that affects the lifetime of such components. In particular, aviation engines are devices whose failure due to fatigue failure of one of the important components can lead to fatal consequences.

In this study, two analyses in the turbine disk of the jet engine during the simulated operating load were performed: The first one was the analysis of the heat-induced stresses using the finite element method. The goal of the second analysis was to determine the residual fatigue strength of a loaded disk by the software tool using the Palmgren - Miner Linear Damage Theory.

The results showed a high degree of similarity with the real tests performed on the aircraft engine and revealed the weak points in the design of the jet engine.

It should be mentioned that without appropriate experiments, results of this analysis could not be verified.

These results are helpful in the re-designing of the jet engines to increase their technical feasibility.

Such analysis has been realized in the DV-2 jet engine research and development program for the first time in the history of jet engine manufacturing process in Slovakia and countries of Eastern Europe region.