A specimen of a 4340 steel alloy with a plane strain fracture toughness of 54.8 MPa (50 ksi ) is exposed to a stress of 1121 MPa (162600 psi). Assume that the parameter Y has a value of 1.15.
(a) If the largest surface crack is 0.8 mm (0.03150 in.) long, determine the critical stress ?
(b) Will this specimen experience fracture? Assume that the parameter Y has a value of 0.99.
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A specimen of a 4340 steel alloy with a plane strain fracture toughness of 54.8 MPa (50 ksi ) is exp...
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