A steel shaft is to be manufactured either as a solid circular bar or as a circular tube . The shaft is required to transmit a torque of 1200 N-m without exceeding an allowable shear stress of 40 MPa nor an allowable rate of twist of 0.75°/m. (The shear modulus of elasticity of the steel is 78 GPa.) (a) Determine the required diameter do of the solid shaft. (b) Determine the required outer diameter d, of the hollow shaft if the thickness t of the shaft is specified as one-tenth of the outer diameter. (c) Determine the ratio of diameters (that is, the ratio d2ldo) and the ratio of weights of the hollow and solid shafts. d2 t = 10 -d-p- -Op- dz (a) (b)

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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A steel shaft is to be manufactured either as a solid circular bar or as a circular
tube
. The shaft is required to transmit a torque of 1200 N-m without
exceeding an allowable shear stress of 40 MPa nor an allowable rate of twist of
0.75°/m. (The shear modulus of elasticity of the steel is 78 GPa.)
(a) Determine the required diameter do of the solid shaft. (b) Determine the
required outer diameter d, of the hollow shaft if the thickness t of the shaft is
specified as one-tenth of the outer diameter. (c) Determine the ratio of diameters
(that is, the ratio d2ldo) and the ratio of weights of the hollow and solid shafts.
d2
t =
10
-d-p-
-Op-
dz
(a)
(b)
Transcribed Image Text:A steel shaft is to be manufactured either as a solid circular bar or as a circular tube . The shaft is required to transmit a torque of 1200 N-m without exceeding an allowable shear stress of 40 MPa nor an allowable rate of twist of 0.75°/m. (The shear modulus of elasticity of the steel is 78 GPa.) (a) Determine the required diameter do of the solid shaft. (b) Determine the required outer diameter d, of the hollow shaft if the thickness t of the shaft is specified as one-tenth of the outer diameter. (c) Determine the ratio of diameters (that is, the ratio d2ldo) and the ratio of weights of the hollow and solid shafts. d2 t = 10 -d-p- -Op- dz (a) (b)
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