고체역학 (Gere) — Stresses in Beams (Advanced Topics): Problem 6.4-6

6.4-6 A wood cantilever beam with a rectangular cross section and length $L$ supports an inclined load $P$ at its free end (see figure). Determine the orientation of the neutral axis and calculate the maximum tensile stress $\sigma_{max}$ due to the load $P$. Data for the beam are $b = 80\text{ mm}$, $h = 140\text{ mm}$, $L = 2.0\text{ m}$, $P = 575\text{ N}$, and $\alpha = 30^\circ$.