고체역학 (Gere) — Stresses in Beams (Basic Topics): Problem 5.5-27

5.5-27 A small dam of a height $h = 2\text{ m}$ is constructed of vertical wood beams $AB$, as shown in the figure. The wood beams, which have a thickness $t = 64\text{ mm}$, are simply supported by horizontal steel beams at $A$ and $B$. Construct a graph showing the maximum bending stress $\sigma_{max}$ in the wood beams versus the depth $d$ of the water above the lower support at $B$. Plot the stress $\sigma_{max}$ (MPa) as the ordinate and the depth $d$ (m) as the abscissa. Note: The weight density $\gamma$ of water equals $10\text{ kN/m}^3$.