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The Basquin fatigue constants for high-cycle-fatigue for high-strength AISI 4142 steel are given as of = 1937 MPa and b = -0.076. A bar
The Basquin fatigue constants for high-cycle-fatigue for high-strength AISI 4142 steel are given as of = 1937 MPa and b = -0.076. A bar made of this material is subjected to uniaxial cyclic loading at a stress amplitude = 750 MPa. The mean stress is not zero. Estimate the fatigue life Nf if: (a) R = -0.6; (ii) R = -1.6667.
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