Physics, 15.02.2020 01:16 allenpaietonp9v8sv
A bar of steel has the minimum properties Se = 40 kpsi, Sy = 60 kpsi, and Sut = 80 kpsi. The bar is subjected to steady torsional stress (τm) of 15.3 kpsi, alternating torsional stress (τa) of 10 kpsi, and alternating bending stress (σa) of 12.4 kpsi. Find the factor of safety guarding against a static failure, and either the factor of safety guarding against a fatigue failure or the expected life of the part.
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