A steel shaft of either solid bar or circular tube is subjected to $1…

Question

A steel shaft of either solid bar or circular tube is subjected to $1200\text{ N-m}$ torque, $40\text{MPa}$ allowable shear stress. The allowable angle of twist is $0.75^\circ/\text{m}$ and G=$78\text{GPa}$

a) Determine diameter of the solid bar and

b) For the hollow shaft, $t=d_0/10$, determine outer diameter

c) Determine ratio of weight of tube to that of solid shaft. ($d_0 = \text{outer diameter}$)

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