The shaft shown in the figure is machined from AISI 1030 CD steel. The shaft rotates at a constant RPM and is supported by roller bearings at A and B. The profile keyway at F has static stress concentration factor of Ktb = 2.312 for bending. The applied forces at gears C, D and F are in the same plane as the bearing reactions and remain constant. a) b) Clearly draw and label shear and bending diagrams for the shaft. Determine the factor of safety against bending fatigue only at location F (centerline of Gear F) assuming 50% reliability and state in words if the shaft will have infinite life based on this location. & GEAR C & GEAR F & GEAR D

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Q: A gear transmits 560 N of torque to a circular shaft having a diameter of 58 mm. A square key 13 mm…

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Q: The shaft shown in the figure is machined from AISI 1040 CD steel. The shaft rotates at 1600 rpm and…

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Q: The shaft shown in the figure is machined from AISI 1040 CD steel. The shaft rotates at 1600 rpm and…

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Combined Loading

Any functioning component, such as machine parts, structural members, pressure vessels, and so on, are all under the influence of more than one force. When anybody is under the influence of more than one force such as shear forces, bending moments, axial forces, torsion, and so on, then such body is said to be under combined loading. A very practical example of combined loading is the crankshaft of an internal combustion engine (IC engine). The crankshaft of the IC engine is under high rpm, which is caused due to the torsional forces. Due to the presence of piston, counterbalances, and internal imbalances, the crankshaft experiences lateral forces and due to the rise in temperature, the crankshaft undergoes thermal expansion, which pulls the crankshaft along the axial direction and lateral direction. The presence of unbalanced loads along the periphery of the crankshaft also induces a bending moment.