고체역학 (Gere) — Stresses in Beams (Advanced Topics): Problem 6.10-14

6.10-14 Solve the preceding problem for a box beam with dimensions \( h = 200 \text{ mm}, h_1 = 160 \text{ mm}, b = 150 \text{ mm}, \) and \( b_1 = 130 \text{ mm}. \) Assume that the beam is constructed of steel with yield stress \( \sigma_Y = 220 \text{ MPa}. \) (Reference to 6.10-13: calculate the yield moment \( M_Y \), plastic moment \( M_p \), and shape factor \( f \).)