A rotating-beam test specimen made of AISI 1095 annealed steel is subjected to a completely reversed...
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A rotating-beam test specimen made of AISI 1095 annealed steel is subjected to a completely reversed stress as it rotates. (a) (4 points) Estimate the endurance limit for the rotating-beam test S and the fatigue strength fraction f. Use these to find the coefficients for Basquin's equation. Plot the idealized S-N diagram for this material. (b) (4 points) Estimate the fatigue strength corresponding to a life of 1.2.105 cycles. Esti- mate the expected life for a completely reversed stress amplitude of 65 kpsi. A rotating-beam test specimen made of AISI 1095 annealed steel is subjected to a completely reversed stress as it rotates. (a) (4 points) Estimate the endurance limit for the rotating-beam test S and the fatigue strength fraction f. Use these to find the coefficients for Basquin's equation. Plot the idealized S-N diagram for this material. (b) (4 points) Estimate the fatigue strength corresponding to a life of 1.2.105 cycles. Esti- mate the expected life for a completely reversed stress amplitude of 65 kpsi.
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