A thin-wall cylinder is made of 2024-T4 aluminum alloy (?u = 430 MPa, ?Y = 330 MPa, ?am = 190 MPa for N = 106). The cylinder has an inside diameter of 300 mm and a wall thickness of 8 mm. The pressure in the cylinder is cycled 106 times between pmin = -2 MPa and pmax = 7 MPa. What is the factor of safety against fatigue failure based on the Gerber relation?
