The centric force P is applied to a short post as shown. Knowing that the stresses on plane a-a are = 15 ksi and

The centric force P is applied to a short post as shown. Knowing that the stresses on plane a-a are σ = −15 ksi and σ = 5 ksi, determine (a) the angle β that plane a-a forms with the horizontal, (b) the maximum compressive stress in the post.

 

Fig. P14.20