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Research Papers: Design and Analysis

Stress Intensity Factor for Repaired Circumferential Cracks in Pipe With Bonded Composite Wrap

[+] Author and Article Information
F. Benyahia

Mechanical Engineering Department,
College of Engineering,
King Saud University,
Riyadh 11451, Saudi Arabia
e-mail: fbenyahia@ksu.edu.sa

A. Albedah

Mechanical Engineering Department,
College of Engineering,
King Saud University,
Riyadh 11451, Saudi Arabia
e-mail: albedah@ksu.edu.sa

B. Bachir Bouiadjra

LMPM,
Department of Mechanical Engineering,
University of Sidi Bel Abbes, BP 89,
Cité Ben M'hidi, Sidi Bel Abbes 22000, Algeria
e-mail: bachirbou@yahoo.fr
and bachirbou@univ-sba.dz

1Corresponding author.

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received May 25, 2013; final manuscript received September 24, 2013; published online April 3, 2014. Assoc. Editor: David L. Rudland.

J. Pressure Vessel Technol 136(4), 041201 (Apr 03, 2014) (5 pages) Paper No: PVT-13-1089; doi: 10.1115/1.4026022 History: Received May 25, 2013; Revised September 24, 2013

The use of composite systems as a repair methodology in the pipeline industry has grown in recent years. In this study, the analysis of the behavior of circumferential through cracks in repaired pipe with bonded composite wrap subjected to internal pressure is performed using three-dimensional finite element analysis. The fracture criterion used in the analysis is the stress intensity factor (SIF). The obtained results show that the bonded composite repair reduces significantly the stress intensity factor at the tip of repaired cracks in the steel pipe, which can improve the residual lifespan of the pipe.

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References

Figures

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Fig. 5

SIF along the pipe thickness for repaired and unrepaired crack

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Fig. 4

Mesh model at the crack front

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Fig. 3

Typical mesh model of the global structures

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Fig. 6

SIF versus crack angle for repaired and un-repaired crack at the internal position of the crack

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Fig. 7

SIF versus crack angle for repaired and unrepaired crack at the external position of the crack

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Fig. 8

SIF versus crack angle for repaired crack

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Fig. 2

Geometrical model of the pipe and the crack

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Fig. 1

Repaired pipe under pressure with boundary conditions

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