고체역학 (Beer) — Pure Bending: Problem 4.136

4.135 through 4.140 The couple M acts in a vertical plane and is applied to a beam oriented as shown. Determine (a) the angle that the neutral axis forms with the horizontal, (b) the maximum tensile stress in the beam. Problem 4.136 specifically refers to a C200 × 17.1 channel section beam. The moment magnitude is \( M = 2.8 \text{ kN}\cdot\text{m} \). The beam's orientation is such that its web makes an angle of \( 10^\circ \) with the vertical. The dimensions given are: height \( h = 203 \text{ mm} \), flange width \( b = 57.4 \text{ mm} \), and centroid distance from the back of the web \( x_{bar} = 14.5 \text{ mm} \).