Torsion of Thin-Walled Closed Sections - Engineering

This engineering video covers a tutorial on how to derive the torsion formula for a shaft with a thin-walled closed section subjected to an applied torque. This torsion formula applies to thin-walled closed sections because the shear flow is constant and tangent to the boundary, and the shear stress can be assumed constant across the thickness of the wall. The section of the shaft may also have a non-uniform thickness.