8.23 A tube having inner radius = 56 mm and outer radius 2 = 60 mm is subjected to a bending moment of 10.0 kN. m. It is made of annealed titanium 6Al-4V. As shown in Fig. P8.23, the tube has a through-wall crack of width 2a = 10mm, located at an angle = 50 relative to the bending axis. Estimate the safety factor, considering both brittle fracture and fully plastic yielding. Use reasonable approximations as needed to reach a solution. Figure P8.23 2a M