고체역학 (Gere) — Torsion: Problem 3.8-9

3.8-9 Two sections of steel drill pipe, joined by bolted flange plates at B, are subjected to a concentrated torque $450 \text{ kN}\cdot\text{m}$ at $x = 0.9 \text{ m}$, and a uniformly distributed torque $t_0 = 225 \text{ kN}\cdot\text{m/m}$ is applied on pipe $BC$. Let $G = 81 \text{ GPa}$ and assume that pipes $AB$ and $BC$ have the same inner diameter, $d = 300 \text{ mm}$. Pipe $AB$ has a thickness $t_{AB} = 19 \text{ mm}$, and pipe $BC$ has a thickness $t_{BC} = 16 \text{ mm}$. Find the reactive torques at $A$ and $C$ and the maximum shear stresses in each segment.