고체역학 (Gere) — Torsion: Problem R-3.4

R-3.4 A brass pipe is twisted by torques \(T = 800 \text{ N}\cdot\text{m}\) acting at the ends causing an angle of twist of \(3.5^\circ\). The pipe has the following properties: \(L = 2.1 \text{ m}\), \(d_1 = 38 \text{ mm}\), and \(d_2 = 56 \text{ mm}\). The shear modulus of elasticity \(G\) of the pipe is approximately: (A) 36.1 GPa (B) 37.3 GPa (C) 38.7 GPa (D) 40.6 GPa