A tensile loadFis to be applied to the tie bar shown in FIGURE 2. The

tie bar is 50 mm diameter. The surface of the bar has defects resulting

from the manufacturing process, these have a maximum depth of 1.5 mm

and have a shape factor of 1.4. If the fracture toughness of the material

used is 120 MPa m–0.5, determine the maximum load which can be

applied if brittle fracture is not to occur. Use a factor of safety of 3.

I have the stress being 627Mpa and the cross sectional area being 1.963mm so my force=stress x area and I get 1230801 which I think is 1.2Mpa which gives me final answer of 1200 Newtons.

Could someone please confirm whether or not this is correct or not help me out here please.....