고체역학 (Beer) — Transformations of Stress and Strain: Problem 7.159

7.159 Two steel plates of uniform cross section 10 × 80 mm are welded together as shown. Knowing that centric 100-kN forces are applied to the welded plates and that \(\beta = 25^\circ\), determine (a) the in-plane shearing stress parallel to the weld, (b) the normal stress perpendicular to the weld.