Low Cycle Fatigue Life Model for Gas Turbine Engine Disks

[+] Author and Article Information
T. G. Meyer, T. A. Cruse

United Technologies Corporation, Pratt & Whitney Aircraft Group, Commercial Products Division, East Hartford, Conn. 06108

J. Eng. Mater. Technol 102(1), 45-49 (Jan 01, 1980) (5 pages) doi:10.1115/1.3224783 History: Received August 10, 1979; Online September 15, 2009


A low cycle fatigue (LCF) life exhaustion method is developed for gas turbine engine disks subjected to complex mission history loading. The method is incorporated into an algorithm for LCF life exhaustion prediction as a function of component, material, mission history, and mission ordering. Principal features in the LCF life model include a simple strain range-mean stress correlation model, a predictive model for the effects of strain-hardened surface layers due to machining and the effects of dwell (creep) due to elevated temperature exposure time, a fracture mechanics-based nonlinear, cumulative damage model, and full-scale component verification.

Copyright © 1980 by ASME
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