고체역학 (Beer) — Shearing Stresses in Beams: Problem 6.54

6.54 (a) Determine the shearing stress at point P of a thin-walled pipe of the cross section shown caused by a vertical shear V. (b) Show that the maximum shearing stress occurs for \(\theta = 90^\circ\) and is equal to \(2V/A\), where \(A\) is the cross-sectional area of the pipe.