Abstract
A mechanical machine needs to be considering the effect of cyclic stress to avoid failures, the machine considered in this work is rotating beam fatigue tester to know the failure points. This machine present the fatigue strength values of different materials when it is subjected to repeated loads at different stress values. To establish the fatigue characteristics, various materials are tested with initial test, at a stress value that is under the material’s ultimate strength. Machine components are subjected to repeated varying forces or fluctuating loads of definite magnitude and stress cycles are to be measured. In this paper it has been analyse the performance EN8 and D2 steel. These materials are used for general applications of thread rolling process which experiences weariness stacking. Further, concentrates on fatigue testing machine to improve strength quality is shown. In the same way the method is repeated with the different values of load on EN8 and D2 steel specimens and the results are plotted and to represented on S-N diagram.
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