A uniformly loaded, simply supported rectangular beam has two 15-mm deep vertical groove...

A uniformly loaded, simply supported rectangular beam has two 15-mm deep vertical grooves opposite each other on the edges at midspan, as illustrated in Fig. P5.18. Find the smallest permissible radius of the grooves for the case in which the normal stress is limited to MPa. Given: p = 12 kN/m, L = 3 m, b = 80 mm, and h = 120 mm.