Experimental Support for Generalized Equation Predicting Low Cycle Fatigue

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  • J. F. Tavernelli
    General Electric Company, Research Laboratory, Schenectady, N. Y.
  • L. F. Coffin
    General Electric Company, Research Laboratory, Schenectady, N. Y.

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<jats:p>Experimental data from cyclic strain fatigue tests on twelve structural materials are compared on the basis of a low cycle fatigue equation as suggested by an ASME task group. This equation S=Ec2N1/2+Se where Se is the endurance limit, E the modulus of elasticity, N the cycles to failure, and c a constant derived from reported values of reduction in area, gives the stress amplitude S for comparison with elastically computed stresses. A satisfactory or good correlation with experiments for up to 105 cycles of failure is found.</jats:p>

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