A steel shaft is to be manufactured either as a solidcircular bar or as a circular tube. The shaft is required totransmit a torque of 1200 N_m without exceeding an allowable shearstress of 40 MPa nor an allowable rate of twist of0.75°/m. (Theshear modulus of elasticity of the steel is 78 GPa.).
Determine the required outer diameter do of the solidshaft [58.8 mm]
Determine the required diameter d2of the hollow shaftif thethickness t of the shaft is specified as one-tenth of theouter diameter. [67.7 mm]
Determine the ratio of diameters (that is, the ratiod2/d0) and the ratio ofweights of the hollow and solid shafts.[1.14, 0.47]
