고체역학 (Beer) — Pure Bending: Problem 4.131

4.127 through 4.134 The couple M is applied to a beam of the cross section shown in a plane forming an angle \(\beta\) with the vertical. Determine the stress at (a) point A, (b) point B, (c) point D. For Problem 4.131: - Moment \(M = 60 \text{ kip}\cdot\text{in.}\) - Angle \(\beta = 50^\circ\) - Cross section: Rectangular block with dimensions \(10 \text{ in.}\) wide (\(5 \text{ in.} + 5 \text{ in.}\)) and \(6 \text{ in.}\) high (\(3 \text{ in.} + 3 \text{ in.}\)). - Two circular holes of radius \(r = 1 \text{ in.}\) centered at \(2.5 \text{ in.}\) from the vertical centerline.