The Z-section of Example 12-7 is subjected to M = 5 kN m, as shown.
Determine the orientation of the neutral axis and calculate the maximum tensile stress σt and maximum compressive stress σc in the beam. Use the following numerical data: height h = 200 mm, width b = 90 mm, constant thickness t = 15 mm, and θp = 19.2°. Use I1 = 32.6 x 106 mm4 and I2 = 2.4 x 106 mm4 from Example 12-7.

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y1 即