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Temperature Influence on σ0 and n Characteristics in the R-O Relationship for High-Strength Steel

The stress and strain fields in front of the crack can be estimated by the Hutchinson-Rice-Rosenger (HRR) formulas [1,2] which are based on the material model defined by Ramberg-Osgood (R-O). Unfortunately, the application of the classical R-O model causes difficulties in material constants α, n determination. Therefore, the simplified version of R-O relation is used.