고체역학 (Beer) — Torsion: Problem 3.156

3.156 The composite shaft shown consists of a 5-mm-thick brass jacket (\(G_{brass} = 39\text{ GPa}\)) bonded to a 40-mm-diameter steel core (\(G_{steel} = 77.2\text{ GPa}\)). Knowing that the shaft is subjected to a 600-N·m torque, determine (a) the maximum shearing stress in the brass jacket, (b) the maximum shearing stress in the steel core, (c) the angle of twist of B relative to A.