고체역학 (Gere) — Analysis of Stress and Strain: Problem 7.2-9

7.2-9 The stresses acting on element B (see figure part a) on the web of a wide-flange beam are found to be $100\text{ MPa}$ in compression in the horizontal direction and $17\text{ MPa}$ in compression in the vertical direction (see figure part b). Also, shear stresses with a magnitude of $24\text{ MPa}$ act in the directions shown. Determine the stresses acting on an element oriented at a counterclockwise angle of $36^\circ$ from the horizontal. Show these stresses on a sketch of an element oriented at this angle.