고체역학 (Gere) — Torsion: Problem R-3.5

R-3.5 An aluminum bar of diameter \(d = 52 \text{ mm}\) is twisted by torques \(T_1\) at the ends. The allowable shear stress is \(65 \text{ MPa}\). The maximum permissible torque \(T_1\) is approximately: (A) \(1450 \text{ N}\cdot\text{m}\) (B) \(1675 \text{ N}\cdot\text{m}\) (C) \(1710 \text{ N}\cdot\text{m}\) (D) \(1800 \text{ N}\cdot\text{m}\)