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Temperature dependence of stress–lifetime fatigue curves
Author(s) -
Kohout J.
Publication year - 2000
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1046/j.1460-2695.2000.00276.x
Subject(s) - materials science , fatigue limit , inverse , goodman relation , ultimate tensile strength , thermal fatigue , structural engineering , composite material , stress concentration , thermodynamics , mathematics , thermal , fracture mechanics , engineering , physics , geometry
By analysing several finite‐life fatigue curves obtained at various temperatures, a relation describing the temperature dependence of fatigue strength is proposed, based on the Basquin equation. Accordingly, an approximate inverse law between fatigue strength and the square root of absolute temperature is demonstrated. Moreover, a boundary temperature above which creep begins to play a significant role is estimated. A simple extension of the relationship to the low‐cycle fatigue region, allows one to determine predictive curves describing fatigue behaviour at various temperatures, even in cases where only a single fatigue curve at a given temperature plus the temperature dependence of tensile strength are known.