고체역학 (Gere) — Stresses in Beams (Advanced Topics): Problem 6.3-12

6.3-12 The cross section of a bimetallic strip is shown in the figure. Assuming that the moduli of elasticity for metals A and B are \(E_A = 168\text{ GPa}\) and \(E_B = 90\text{ GPa}\), respectively, determine the smaller of the two section moduli for the beam. (Recall that section modulus is equal to bending moment divided by maximum bending stress.) In which material does the maximum stress occur?