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- W1999044602 abstract "Ductile-brittle fracture transition was investigated using compact tension (CT) specimens from −70 to 40°C for a carbon steel. Large deformation finite element analysis was carried out to simulate the stable crack growth in the compact tension (CT, aW = 0.6), three point-point bend [SE(B), aW = 0.1] and centre-cracked tension [M(T), aW = 0.5] specimens. An experimental crack tip opening displacement (CTOD) resistance curve was employed as the crack growth criterion. Ductile tearing is sensitive to constraint and tearing modulus increases with reduced constraint level. The finite element analysis shows that path-dependence of the J-integral occurs from the very beginning of crack growth and ductile crack growth elevates the opening stress on the remaining ligament. Cleavage may occur after some ductile crack growth due to the increase of opening stress. For both stationary and growing cracks, the magnitude of opening stress increases with increasing in-plane constraint. The ductile-brittle transition takes place when the opening stress ahead of the crack tip reaches the local cleavage stress as the in-plane constraint of the specimen increases." @default.
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- W1999044602 date "1997-10-01" @default.
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- W1999044602 title "Effect of constraint on ductile crack growth and ductile-brittle fracture transition of a carbon steel" @default.
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- W1999044602 doi "https://doi.org/10.1016/s0308-0161(97)00057-4" @default.
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