고체역학 (Beer) — Pure Bending: Problem 4.182

4.181 and 4.182 Knowing that \( M = 5 \text{ kip}\cdot\text{in.} \), determine the stress at (a) point \( A \), (b) point \( B \). [Note: Problem 4.182 refers to the diagram labeled Fig. P4.182 which shows a curved beam segment with the following dimensions: inner radius \( r_i = 2 \text{ in.} \), radial width \( h = 3 \text{ in.} \), and vertical thickness \( b = 2.5 \text{ in.} \). The moment \( M \) acts in the horizontal plane, which is the plane of curvature of the beam.]