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).
(a) Determine the maximum tensile stress (max and the maximum in plane shear stress tmax in the wall of the cylinder.
(b) If the allowable in-plane shear stress is 30 MPa, what is the maximum allowable torque T?

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