고체역학 (Beer) — Torsion: Problem 3.114

3.114 The solid circular drill rod AB is made of a steel that is assumed to be elastoplastic with \(\tau_Y = 22 \text{ ksi}\) and \(G = 11.2 \times 10^6 \text{ psi}\). Knowing that a torque \(T = 75 \text{ kip}\cdot\text{in.}\) is applied to the rod and then removed, determine the maximum residual shearing stress in the rod.