Designing to Avoid Fatigue in Long Life Engines 660311
Precise analysis and experimental verification as an integral part of the complex design process make possible the jet execution and attainment of design goals for long life jet engines. This paper emphasizes the key factors of fatigue insensitivity as represented by control of vibration, the cyclic character of engine operation, the control of transient thermal response, and a constant alertness to the limitations of familiar measures of material strength in establishing permissible levels of structural loads. Each factor is discussed fully in relation to specific areas of the engine and is supported by illustrative test and computational data.
