Creep Life Consumption Monitoring of a Turbine Rotor Blade

Abstract Creep Life consumption of the engine components is highly sensitive to variations in operational stresses and temperatures, which are controlled by engine operational conditions that are in turn driven by the mission objectives. Conventional methods of life consumption assessment lack in capturing the variations in the operating conditions and the uncertainties in the governing parameters accurately. The paper describes a method for creep life consumption monitoring of a turbine rotor blade considering the variations in engine operating conditions. Response surface method is applied to develop a functional relationship for the creep life in terms of the influencing variables. Probabilistic creep life prediction model is developed for considering the uncertainty in the input parameters, geometry and material data. A service life consumption assessment method capable of capturing the varying operating conditions with relatively higher accuracy is proposed that enables economic maintenance and withdrawal schedules.