Experimental Verification of the Analytical Method for Estimated S-N Curve in Limited Fatigue Life

The paper presents the method of determining the S-N curve based on the static material properties only. To verify the procedure algorithm, an experiment has been carried out to define the reference fatigue characteristics of material C45+C. The research was performed with the use of the rotary-bending test stand made according to own design. The proper operation of the materials testing machine was verified compliant with the ISO 1143 standard. The analytical method was verified by making statistical calculations assuming the null hypothesis of the equality of slope coefficients of the estimated line with the analytical method and the experimental line. The statistics values calculated have shown that there exist no grounds for rejecting the null hypothesis.