고체역학 (Gere) — Stresses in Beams (Basic Topics): Problem 5.5-18

5.5-18 Determine the maximum tensile stress \(\sigma_t\) and maximum compressive stress \(\sigma_c\) due to the load \(P\) acting on the simple beam \(AB\) (see figure). (a) Data are \(P = 6.2 \text{ kN}\), \(L = 3.2 \text{ m}\), \(d = 1.25 \text{ m}\), \(b = 80 \text{ mm}\), \(t = 25 \text{ mm}\), \(h = 120 \text{ mm}\), and \(h_1 = 90 \text{ mm}\). (b) Find the value of \(d\) for which tensile and compressive stresses are the largest. What are these stresses?