The aim of this paper is determining the rate of fatigue damage due to applying rotating bending fatigue test on standard specimens. The influence of rotating bending fatigue tests are investigated on the mechanical parameters- yield strength, ultimate strength, percentage of area reduction and the percentage of elongation- on standard specimens. Different fatigue loads are applied to the specimens on which fatigue test was run in such a way that no specimen reached to its fracture cycle. Then, tensile test was done on the specimens and the mechanical parameters were determined for each specimen. Then, the data was compared with the data obtained from the specimen on which no fatigue test was run and the tensile test was carried out on it directly. Results show that, in comparison to the other mechanical parameters, ultimate strength is more sensitive to the fatigue test that can be a reliable criterion for fatigue damage.

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