A thick plate of high-strength titanium alloy is 300 mm wide and contains a central crack of length 90 mm. In a tension test the plate fails by brittle fracture at an applied stress of 220 MPa.
a. Determine the fracture toughness KIC of the alloy.
b. Determine the magnitude of the applied stress that would produce brittle fracture for the same length of crack (i) in an infinitely wide plate and (ii) in a plate 360 mm wide.
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