고체역학 (Beer) — Torsion: Problem 3.130

3.130 Shafts A and B are made of the same material and have the same cross-sectional area, but A has a circular cross section and B has a square cross section. Determine the ratio of the maximum torques \(T_A\) and \(T_B\) when the two shafts are subjected to the same maximum shearing stress (\(\tau_A = \tau_B\)). Assume both deformations to be elastic.