고체역학 (Beer) — Torsion: Problem 3.126

3.126 Knowing that \(T = 7\text{ kip}\cdot\text{in.}\) and that \(G = 5.6 \times 10^6\text{ psi}\), determine for each of the cold-rolled yellow brass bars shown the maximum shearing stress and the angle of twist at end \(B\).