A 3 ft long solid SAE4340 OQT1000 steel shaft is required to transmit a power of 200 HP. The shaft speed is 1500 rpm. The allowable shear stress is 40 ksi and the allowable angle of twist per foot of length is 0.05 radians. Determine the minimum diameter that meets the design requirements. Note: Shear modulus for steel is given in Appendix 3/ Page 788.

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Q: A 5 ft long solid SAE4340 OQT1000 steel shaft is required to transmit a power of  180 HP. The shaft…

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Q: The maximum value of the torsional shear stress is kpsi.

A: To find Torsional shear stress

Q: Problem 4

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Q: A 5 ft long solid SAE4340 OQT1000 steel shaft is required to transmit a power of  180 HP.  The shaft…

A: Given: Length of the shaft (L)=5ft Power (P)=180HP Shaft speed (N)=3000rpm or 2π×300060=314.159rad/s…

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Q: A 30 in. tubular shaft is in torsion under torque 33 lb-in.. Its cross section shown below with…

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Q: Problem 5

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Q: (2) The shaft consists of a 3-in diameter aluminum segment that is rigidly joined to a 2-in diameter…

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Q: Please give Handwritten solution use torsion equation

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Q: A solid steel shaft is to transmit 120hp.  The allowable shear stress is 8,000 psi.  Calculate the…

A: Given The solid steel shaft transmit power of P=120 hp. The allowable shear stress is τ=8000 psi…

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Q: A drive shaft is made of solid steel. It is desired to transmit 2.5 hp at 150 rpm. The allowable…

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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.