2.17 In using this leg curl machine the exertion of the legs results in a torque M 120 lb-ft on the shaft that connects to cord disk. The cord disk has a radius R = 8 in. Determine the resulting tensile stress in the 0.125 in. diameter steel cable within the cord that wraps around the cord disk. Assume that frictionless bearings allow the shaft-cord disk assembly to rotate freely in place. Prob. 2.17 (Appendix A4)

2.17 In using this leg curl machine the exertion of the legs results in a torque M 120 lb-ft on the shaft that connects to cord disk. The cord disk has a radius R = 8 in. Determine the resulting tensile stress in the 0.125 in. diameter steel cable within the cord that wraps around the cord disk. Assume that frictionless bearings allow the shaft-cord disk assembly to rotate freely in place. Prob. 2.17 (Appendix A4)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Concept explainers

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.

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2.17 In using this leg curl machine the exertion of the legs results in a torque
M = 120 lb-ft on the shaft that connects to cord disk. The cord disk has a radius
R = 8 in. Determine the resulting tensile stress in the 0.125 in. diameter steel
cable within the cord that wraps around the cord disk. Assume that frictionless
bearings allow the shaft-cord disk assembly to rotate freely in place.
Prob. 2.17 (Appendix A4)

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