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  3. 2 consider a rotating shaft made from steel with an...

Question: 2 consider a rotating shaft made from steel with an...

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2. Consider a rotating shaft made from steel with an ultimate tensile strength of 120 ksi and a yield strength of 90 ksi. At a location when the shaft diameter steps down from 1.50 to 1.25 inches, with a fillet radius of 0.060 inches, the shaft is subjected to a bending moment of 1500 in-lb and a torque of 1200 in-lb. Find the factor of safety for infinite life with the Goodman criterion. Figure A-15-8 Round shaft with shoulder fillet in torsion. To = Tc/J, where c- d/2 and J- 32 3.0 2.6 1.8 1.20 1.33 14 1.09 1.0 0.10 0.15 Figure A-15-9 Round shaft with shoulder fillet in bending. σ。= Mc/l, where c=d/2 and 1 = π 64. 3.0 2.6 2.2 1.8 1.5 1.05 005 0.10 0.15 0.30
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