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The effect of creep-fatigue interactions on thermo-mechanical fatigue life and reliability estimates for a typical gas turbine engine component
Shanmugam E.M.,
Published in
Volume: 12
The low cycle fatigue-creep damage is the main parameter for the failures of gas turbine components under high temperature and cyclic loading. In this work, different combinations of Creep-Fatigue damage are introduced and checked for its impact on the Turbine life and its reliability. Linear and Non-Linear Creep-Fatigue combinations were considered as part of this work. The Turbine rotor under present study is made out of Nimonic-90 nickel base alloy forging. Weibull distribution method was used to study the reliability. It was found that, the reliability reduces from 99% to 25% when creep damage component is increased from 20% to 40% for a fixed Turbine life. The damage factor was found more in above linear Creep-Fatigue curve and less in below linear Creep-Fatigue curve. Copyright © 2019 ASME.
About the journal
JournalASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Open AccessNo