Abstract

This paper presents a complex approach to designing ceramic blades dovetail joints. Two ceramic materials were considered: diamond reinforced silicon carbide and hot pressed silicon nitride (only in contact testing). The model blades were made from diamond reinforced silicon carbide due to its availability and mature technology.

Part 1 describes the models of mechanical and thermal contact and contains experimental data on contact strength and thermal contact conductance.

Part 2 investigates the effect of stress concentration and scale factor on the fracture of ceramic test pieces.

Part 3 proposes a theoretical-experimental method to estimate friction coefficient in a dovetail joint. We also investigated the character of the ceramic blades fracture during the rotor spin-up.

Part 4 deals with automating the design process of the ceramic blades dovetail joints using experimental data.

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