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1 - A rotating stepped shaft has dimensions of D = 2.0 in., d = 1.0 in. and fillet radius of r = 0.05 in. The shaft is made of steel with Su = 90,000 psi and Sy =75,000 psi. All surfaces are machined. For an infinite life, 90% reliability and a safety factor of 2.0, determine:

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1.72

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  1. 1 - A rotating stepped shaft has dimensions of D = 2.0 in., d = 1.0 in. and fillet radius of r = 0.05 in. The shaft is made of steel with Su = 90,000 psi and Sy =75,000 psi. All surfaces are machined. For an infinite life, 90% reliability and a safety factor of 2.0, determine: a) The fatigue stress concentration factors (for bending and torsion) at the fillet. b) The value of a fully reversed moment, ± M, that the shaft can carry. c) The value of a fully reversed torque, ± T, that the shaft can carry. 1.72

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