Determination of Conditional Probability of Dynamic Ductile Axial Crack Arrest for Conventionally-Rolled, Lower-Toughness Linepipe Materials

[+] Author and Article Information
David L. Rudland

Gery M. Wilkowski

Engineering Mechanics Corporation of Columbus 3518 Riverside Dr, Suite 202 Columbus, OH 43221

Shinobu Kawaguchi, Naoto Hagiwara

Tokyo Gas Co., Ltd., Pipeline Technology Center 1-7-7, Suehiro-cho, Tsurumi-ku, Yokohama, Japan, 230-0045

J. Pressure Vessel Technol 127(2), 143-150 (May 27, 2005) (8 pages) doi:10.1115/1.1858924 History: Received March 16, 2004; Revised November 22, 2004; Online May 27, 2005
Copyright © 2005 by ASME
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Interaction between decompression and fracture velocity curves shown schematically
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Increase in required Charpy energy as a function of crack propagation length, data from Ref. 7 (for 762 mm {30 in} diameter, backfilled pipe)
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Predicted versus actual Charpy from full-scale experiments
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Uncertainty in the predicted arrest toughness using the simplified Battelle equations
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Actual versus predicted CVNmax/CVNreq illustrating uncertainty
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Crack length at arrest versus Charpy toughness for non-steady-state fracture
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PDF for CVNmax/CVNreq for crack propagation length at arrest equal to 12 m for a 762 mm (30 in.) diameter pipe
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Flowchart illustrating steps in probabilistic model
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CVN distribution examples
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Conditional probability of crack arrest with a crack length greater than one pipe joint
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Conditional probability of arrest illustrating the difference between a crack initiating at the center and end of a joint




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