Journal of Theoretical
and Applied Mechanics
0, 0, pp. , Warsaw 0

Accuracy of determined S-N curve by selected models

Przemysław Strzelecki
The study shows the models defining the relationship between the fatigue life and the stress amplitude. The first models have been developed at the beginning of the 20th century; however, new models are still being developed. The author decided to compare the most commonly used model, i.e. a linear regression model and the two models discussed in ISO-12107. The comparison also included some recently developed models, i.e. Stromeyer, Basenaire, Castillo et al., Kohout and Vechet, Leonetti et al., and Pasual and Meeker model, including its modified version. The fatigue data for S355J2+C and AISI 1045 steel were used for the comparison. The best estimate of the fatigue life was obtained by using the modified Pasual and Meeker model.
Keywords: S-N curve; high-cycle fatigue; steel; fatigue design; data analyse

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