The internal loadings at a critical section along the steel drive shaft of a ship are calculated to be a torque of 2300 lb # ft, a bending moment of 1500 lb . ft, and an axial thrust of 2500 lb. If the yield points for tension and shear are σY = 100 ksi and τY = 50 ksi, respectively, determine the required diameter of the shaft using the maximum-shearstress theory.
