Approximate J Estimates for Circumferential Cracks in between Elbows and Attached Pipes

Abstract:

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The present work proposes a method for elastic-plastic fracture mechanics analysis of the circumferential through-wall crack in between elbows and attached straight pipes, subject to in-plane bending. Based on small strain finite element limit analyses, closed-form limit load solutions are given first. Then applicability of the reference stress based method to approximately estimate J is proposed. One interesting finding is that a popular approach to assume that the crack locates in the straight pipe could lead to significantly different assessment results.

Info:

Periodical:

Key Engineering Materials (Volumes 345-346)

Edited by:

S.W. Nam, Y.W. Chang, S.B. Lee and N.J. Kim

Pages:

521-524

Citation:

T. K. Song et al., "Approximate J Estimates for Circumferential Cracks in between Elbows and Attached Pipes", Key Engineering Materials, Vols. 345-346, pp. 521-524, 2007

Online since:

August 2007

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Price:

$38.00

[1] NUREG 1061. Evaluation of potential for pipe break, Volume 3. USNRC, (1984).

[2] ABAQUS Version 6. 4-1. User's Manual. ABAQUS, Inc, (2003).

[3] Ainsworth RA. Engineering Fracture Mechanics 1984; 19: 633-642.

[4] Kim YJ, Budden PJ. International Journal of Fracture 2002: 116; 195-218.

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