You are expected to design an offshore structure composed a very large members against dynamic fracture. The members are made from high strength steel plates (yield stress = 700 MPa and dynamic plane strain fracture toughness = 80 MPam). A tensile design stress based on the yield stress with a safety factor of 2 has been proposed, but no one knows what flaw geometries might be present as a result of fabrication. If the following possible flaw geometries can exist in the plate: i. elliptical center crack ii. double-edge crack iii. embedded circular crack (a) Determine the critical flaw size that can be tolerated for each flaw geometry and state which geometry has the most deleterious effect.