A beam of semicircular cross section of radius r is subjected to a bending moment M having its vector at an angle u to the z axis (see figure).
Derive formulas for the maximum tensile stress σt and the maximum compressive stress σc in the beam for θ= 0, 45°, and 90°.
![2447_b50c1e1c-dd6c-4ee0-92d5-0171a785bd95.png](https://secure.tutorsglobe.com/CMSImages/2447_b50c1e1c-dd6c-4ee0-92d5-0171a785bd95.png)