Consider two beams, both of length L, with the cross sectional configurations shown. Each beam is subjected to a pure moment, M. Determine the ratio of the maximum principal stress of beam B to that of beam A, sB/sA. Use r1 = 0.4in, r2 = 0.5in, r3 = 1.0in, E1 = 30x106psi, E2 = 200x103psi, E3 = 2x106psi.
