A steel ship deck plate is 30 mm thick and 12 m wide. It is loaded with a nominal uni- axial tensile stress of 70 MPa. It is ope
rated below its ductile-to-brittle transition temperature with KIc equal to 38.3 MPa. If a 65-mm-long central transverse crack is present, estimate the tensile stress at which catastrophic failure will occur. Compare this stress with the yield strength of 240 MPa for this steel.
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