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Creep-fatigue analysis by strain-range partitioning.The framework of a new method is outlined for treating creep-fatigue behavior of metals. Inelastic strain-ranges are partitioned into the components of (1) completely reversed plasticity, (2) tensile plasticity reversed by compressive creep, or tensile creep reversed by compressive plasticity, and (3) completely reversed creep. Each of these components is shown to be related to cyclic life by a Manson-Coffin type power-law equation. A linear life fraction rule is used to combine the damaging effects of the individual components enabling the prediction of life. Test results are presented for a 2.25 Cr-1 Mo steel as well as limited information for a Type 316 stainless steel.
Document ID
19720039532
Acquisition Source
Legacy CDMS
Document Type
Other - Collected Works
Authors
Manson, S. S.
Halford, G. R.
Hirschberg, M. H.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1971
Subject Category
Structural Mechanics
Accession Number
72A23198
Distribution Limits
Public
Copyright
Other

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