고체역학 (Gere) — Torsion: Problem 3.7-11

3.7-11 A motor delivers 200 kW at 1000 rpm to the end of a shaft (see figure). The gears at B and C take out 90 and 110 kW, respectively. Determine the required diameter d of the shaft if the allowable shear stress is 7500 psi and the angle of twist between the motor and gear C is limited to 1.5°. (Assume G = 80 GPa, \(L_1 = 1.8\) m, and \(L_2 = 1.2\) m.)