NASALIFE - Component Fatigue and Creep Life Prediction ProgramNASALIFE is a life prediction program for propulsion system components made of ceramic matrix composites (CMC) under cyclic thermo-mechanical loading and creep rupture conditions. Although the primary focus was for CMC components, the underlying methodologies are equally applicable to other material systems as well. The program references empirical data for low cycle fatigue (LCF), creep rupture, and static material properties as part of the life prediction process. Multiaxial stresses are accommodated by Von Mises based methods and a Walker model is used to address mean stress effects. Varying loads are reduced by the Rainflow counting method or a peak counting type method. Lastly, damage due to cyclic loading and creep is combined with Minor s Rule to determine damage due to cyclic loading, damage due to creep, and the total damage per mission and the number of potential missions the component can provide before failure.
Document ID
20110015541
Acquisition Source
Glenn Research Center
Document Type
Other
Authors
Gyekenyesi, John Z. (N and R Engineering and Management Services Parma Heights, OH, United States)
Murthy, Pappu L. N. (NASA Glenn Research Center Cleveland, OH, United States)
Mital, Subodh K. (Toledo Univ. Toledo, OH, United States)
IDRelationTitle20140010774See AlsoNASALIFE - Component Fatigue and Creep Life Prediction Program20140010774SupersedesNASALIFE - Component Fatigue and Creep Life Prediction Program