8.5-3 A cylindrical pressure vessel having radius r = 300 mm and wall thickness t = 15 mm is subjected to internal pressure p = 2.5 MPa. In addition, a torque T = 120 kN·m acts at each end of the cylinder (see figure). and the (a) Determine the maximum tensile stress σ in the wall of the cylinder. maximum in-plane shear stress Tmax (b) If the allowable in-plane shear stress is 30 MPa, what is the maximum allowable torque T? max (c) If T = 200 kN·m and allowable in-plane shear and allowable normal stresses are 30 MPa and 76 MPa, respectively, what is the minimum required wall thickness? T PROB. 8.5-3 T