고체역학 (Gere) — Torsion: Problem 3.11-5

3.11-5 A square tube section has side dimension of 500 mm and thickness of 13 mm. If the section is used for a 2.75 m-long beam subjected to 140 kN·m torque at both ends, calculate the maximum shear stress and the angle of twist between the ends. Use G = 80 GPa.