NASALife-Component Fatigue and Creep Life Prediction Program and Illustrative Examples

Author:: Gyekenyesi, John Z.
Published:: [2005].
Physical Description:: 1 electronic document
Additional Creators:: Murthy, Pappu L. N. and Mital, Subodh K.

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Summary:

NASALife 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 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. Lastly, damage due to cyclic loading (Miner s rule) and creep are combined to determine the total damage per mission and the number of missions the component can survive before failure are calculated. Illustration of code usage is provided through example problem of a CMC turbine stator vane made of melt-infiltrated, silicon carbide fiber-reinforced, silicon carbide matrix composite (MI SiC/SiC)

Other Subject(s):

Composite Materials

Collection:

NASA Technical Reports Server (NTRS) Collection.

Note:

Document ID: 20060013345.
International Conference on Computational and Experimental Engineering and Sciences; 1-6 Dec. 2005; Madras; India.

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