2. A steel marine propeller shaft 24 in. in diameter and 16 ft long is subjected to atorque of 2400 ksi. If G = 24 × 10° psi, determine the maximum shearing stressand the angle of twist.

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Answered: 2. A steel marine propeller shaft 24…

2. A steel marine propeller shaft 24 in. in diameter and 16 ft long is subjected to a torque of 2400 ksi. If G = 24 × 106 psi, determine the maximum shearing stress and the angle of twist.

Elements Of Electromagnetics

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Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Concept explainers

Torsion

In mechanical engineering, torque, torsion, and twisting moment are three of the most important concepts which have different meanings. Torque is the consequence of a moment of a force that produces an angular acceleration in a body or induces rotational kinetic energy in a body. For instance, in an automobile, the power transmission shaft is a body that is always under rotation due to the external torque acting on it, this torque is created by the engine.

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2. A steel marine propeller shaft 24 in. in diameter and 16 ft long is subjected to a
torque of 2400 ksi. If G = 24 × 10° psi, determine the maximum shearing stress
and the angle of twist.

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Problem 3
1. A drive shaft to the blades of a helicopter transmits 800 kW at 200 rev/min. Neglecting transmission losses; determine the minimum external and internal diameters of the hollow circular section aluminum alloy shaft, when the maximum permissible shear stress in the shaft is limited to 30 MPa. It may be assumed that the external diameter of this shaft is twice its internal diameter. What will be the resulting angle of twist of this shaft over a length of 2 m, given that the modulus of rigidity, C 26900MPA.
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