You are to design a steel driveshaft or halfshaft such as in a front wheel drive vehicle. The worst case shaft loading as estimated from input limits is that it needs to transmit 250hp at 5000rpm. Bending loads and axial loads are negligible because of constant velocity joints and splines at the end of the shaft. Select an appropriate shaft diameter if the material scientist has selected CD SAE 1020 (use Shigleyâs to find your material allowables). Do not include any additional safety factors assume this is built into the load via a load factor. Required:
a. What is the nominal shear stress (away from splines and any stress concentrations) at the surface of your shaft?
b. Your old boss says try a hollow shaft where the inside diameter is 0.9 times the outside diameter used, what outside diameter would be required to give the same outer-surface stress?
c. How does the weight/length of the solid and hollow shaft compare?