A differential element is subjected to the stresses (in kpsi): σ1 = 10, σ2 = 0, σ3 = –20. A brittle material has the strengths (in kpsi) Sut = 50, Suc = 90. Calculate the safety factor and draw σ1– σ3 diagrams of each theory showing the stress state using:(a) Coulomb-Mohr theory.(b) Modified-Mohr theory.
