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TECHNICAL PAPERS

Estimates of Crack-Driving Force in Surface-Cracked Elbows

[+] Author and Article Information
Gery M. Wilkowski

Engineering Mechanics Corporation of Columbus, Hilliard, OH 43026e-mail: gwilkows@columbus.rr.com

Raj Mohan

Rouge Steel Company, Dearborn, MI 48121e-mail: rmohan@rougesteel.com

Thomas J. Kilinski

Battelle, Columbus, OH 43201e-mail: kilinski@battelle.org

J. Pressure Vessel Technol 123(1), 32-40 (Jan 20, 2000) (9 pages) doi:10.1115/1.1343456 History: Revised January 20, 2000; Received October 18, 2000
Copyright © 2001 by ASME
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References

Figures

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Comparison of limit-load definitions by design stress and fracture approaches
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J versus moment calculations for axial, flank, surface crack (SC.ELB3 analysis) in an elbow and various straight-pipe circumferential crack J-estimation schemes—(a) Rm/t=5, (b) Rm/t=10, (c) Rm/t=20
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Comparison of J versus moment for circumferential, surface-cracked, straight pipe to moment for axial, flank, surface-cracked elbow at the same J-values (Mpipe/Melbow|J)
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Comparison of ASME elbow stress indices to ratio of moment for circumferential, surface-cracked, straight pipe to moment for axial, flank, surface-cracked elbow at the same J-values (Mpipe/Melbow|J)
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Comparison of EDF, axial, flank, surface-cracked elbow experiment Y6135 on an aged cast stainless steel elbow 15 to criteria developed in Fig. 4
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J versus moment calculations for circumferential, extrados, surface crack (SC.ELB1 and SC.ELB2 analyses) in an elbow and various straight-pipe circumferential crack J-estimation schemes—(a) Rm/t=5, (b) Rm/t=10, (c) Rm/t=20
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Comparison of J versus moment for circumferential, surface-cracked, straight pipe to moment for circumferential, extrados, surface-cracked elbow at the same J-values (Mpipe/Melbow|J)—(a) using SC.ELB1 analysis, (b) using SC.ELB2 analysis
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Comparison of ASME elbow stress indices to ratio of moment for circumferential, surface-cracked, straight pipe to moment for circumferential, extrados, surface-cracked elbow at the same J-values (Mpipe/Melbow|J)—(a) using SC.ELB1 analysis, (b) using SC.ELB2 analysis
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Comparison of IPIRG-2, circumferential, extrados, surface-cracked, experiments on A106-90 and WP304L elbows to criteria developed in Fig. 8 (SC.ELB1 and SC.ELB2 analyses are virtually identical)
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Comparison of axial-flank and circumferential-extrados surface-cracked elbow failure avoidance criteria

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