Solution to Problem 339 | Torsion of thin-walled tube Problem 339 A torque of 450 lb·ft is applied to the square section shown in Fig. P-339. Determine the smallest permissible dimension a if the shearing stress is limited to 6000 psi. Problem 339 Click here to expand or collapse this section $T = 2At\tau$ Where: $T = 450 \, \text{lb}\cdot\text{ft} = 450(12) \, \text{lb}\cdot\text{in}$ $A = a^2$ $\tau = 6000 \, \text{psi}$ $450(12) = 2a^2(0.10)(6000)$ $a = 2.12 \, \text{ in}$ answer Tags Torque Torsional Shearing Stress Shearing Stress thin-walled tube Log in to post comments Book traversal links for Solution to Problem 339 | Torsion of thin-walled tube Solution to Problem 338 | Torsion of thin-walled tube Up Solution to Problem 340 | Torsion of thin-walled tube