– A thin-walled tube, as in Fi

– A thin-walled tube, as in Fig. P8.19, is loaded with an internal pressure p and has a longitudinal through-wall crack of length 2a. Stress intensity factors f or this case from Tada (2000) are

The material is titanium 6Al-4V alloy (annealed), the pressure is p = 40 MPa, and the tube dimensions are ravg = 50 and t = 4 mm. A crack of tip-to-tip length 2a = 20 mm may be present. What is the safety factor against fracture? What is the safety factor against yielding with no crack present? Is the tube safe to use if failure could present a safety hazard?