A hollow shaft for marine applications has outer and inner diameters of 400 mm and 200 mm respectively and transmits 8000 kW at 100 r/min. Calculate the maximum shear stress in the hollow shaft. Calculate the shear stress on the inner surface of the hollow shaft. Determine the maximum length of this shaft if the maximum shear stress as well as an angle of twist of 30 is not to be exceeded. (G = 80 GPa)

Mechanics of Materials (MindTap Course List)
9th Edition
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Barry J. Goodno, James M. Gere
Chapter3: Torsion
Section: Chapter Questions
Problem 3.7.5P: The propeller shaft of a large ship has an outside diameter 18 in. and inside diameter 12 in,, as...
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A hollow shaft for marine applications has outer and inner diameters of 400 mm and 200 mm respectively and transmits 8000 kW at 100 r/min.

 

  • Calculate the maximum shear stress in the hollow shaft.

 

  • Calculate the shear stress on the inner surface of the hollow shaft. 

 

  • Determine the maximum length of this shaft if the maximum shear stress as well as an angle of twist of 30 is not to be exceeded. (G = 80 GPa)                         

 

  • If this shaft is connected to a similar shaft, 1 m long, through a 10-bolt rigid flange coupling, determine the minimum standard bolt diameter if the pitch circle diameter of the coupling is pcd = 450 mm and the allowable shear stress in the bolts should not exceed 55 MPa.                               

 

  • Determine the equivalent torsional stiffness of the shaft assembly. 

 

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