Evaluation of fatigue parameters estimation methods with regard to specific ranges of fatigue lives and relevant monotonic properties

Evaluations of methods for estimation of fatigue parameters from materials’ monotonic properties and comparisons of estimated and experimental fatigue lives are regularly performed for complete range of fatigue lives and materials with wide range of monotonic properties. In some cases this causes in significant averaging of results of evaluations and possibly erroneous conclusions on estimation methods accuracy. A comprehensive evaluation of three selected, estimation methods was performed using established methodology on an extensive number of detailed fatigue datasets on unalloyed, low-alloy and high alloy steels. Results provide detailed insight on the accuracy of the selected estimation methods and their applicability for the estimation of fatigue parameters of various materials divided to low and high strength subgroups and for low- and high-cycle fatigue regimes.