5.8 A torsional vibration damper consists of a hollow steel shaft fixed at one end and to the other

5.8 A torsional vibration damper consists of a hollow steel shaft fixed at one end and to the other end is attached a solid circular steel shaft which passes concentrically along the inside of the hollow shaft, as shown in Fig. 5.16. Determine the maximum torque T that can be applied to the free end of the solid shaft SO that the angle of twist where the torque is applied does not exceed 5 degree. Local effects where the two parts are connected may be ignored. Shear modulus, G = 80 GN/m^2.