1982-02-01

A Unified Approach to Turbine Blade Life Prediction 821439

A computer based design analysis system for turbine blades has been implemented by assimilating state-of-the-art techniques in stress analysis, life prediction and material modeling, metal temperature prediction and probablistic design philosophies. State-of-the-art capabilities in each of these technologies are reviewed and compared to those of the described system with an emphasis on the technologies of structural analysis and life prediction. Calibration of the constituents of the design system with extensive component and material characterization tests are described. A statistical design approach was chosen to deal with blade-to-blade uncertainties in fundamental design parameters and provide increased decision making visibility in the design process. The design system described is considered applicable to all aspects of turbine engine design life analysis.

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