In Figure P5.94, the shaft is attached to a torsional spring at one end and fixed to a rig...

In Figure P5.94, the shaft is attached to a torsional spring at one end and fixed to a rigid wall at the other end. The shaft has an 80-mm diameter and shear modulus G = 77.5 GPa. The torsional spring constant is β = 200 kN • m/rad. A torque of magnitude 5 kN • m is applied to the midsection of the shaft as shown. Determine the maximum shear stress in the shaft.

FIGURE P5.94