Question: Same as Problem for a Class 40 cast-iron shaft with a factor of safety of 10 based on the ultimate stresses. Use SI units.
Problem: Determine the size of a hollow steel shaft whose inside diameter is equal to one-half the outside diameter, if the bending moment developed is 1.4 kN · m and the torque transmitted is 1.7 kN · m. The allowable shear stress is 55 MPa.