The aim of the present study is to develop numerical modeling procedures to simulate and study the effect of girth weld induced residual stresses and geometric imperfections on the behavior of conventional carbon steel oil and gas pipelines. The effect of welding residual stresses was obtained through computational simulations of the multipass girth weld process. The numerical procedures were calibrated using available pubic domain data on stainless steel. The methodology for conducting the welding simulation is presented. A parametric analysis was conducted using the finite element methods to evaluate the effects of welding residual stress due to girth welding processes, joint-to-joint misalignment associated with the girth weld, internal pressure, axial force, and diameter to wall thickness ratio on the local buckling response of pipelines. The pipeline moment-curvature response was examined to determine the influence of these parameters. For the parameters investigated, results from this study have demonstrated the significance of residual stress state due to welding processes and girth weld misalignment on the local buckling response of pipelines subjected to monotonic loading with combined stress state.
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August 2011
Research Papers
Effect of Misalignment and Weld Induced Residual Stresses on the Local Buckling Response of Pipelines
Aiman Al-Showaiter,
Aiman Al-Showaiter
MCS Kenny
, Houston, TX 77084; Dalhousie University
, Halifax, NS, B3J 1Z1, Canada
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Farid Taheri,
Farid Taheri
Dalhousie University
, Halifax, NS, B3J 1Z1 Canada
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Shawn Kenny
Shawn Kenny
Memorial University
, St. John’s, NL, A1B 3X5 Canada
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Aiman Al-Showaiter
MCS Kenny
, Houston, TX 77084; Dalhousie University
, Halifax, NS, B3J 1Z1, Canada
Farid Taheri
Dalhousie University
, Halifax, NS, B3J 1Z1 Canada
Shawn Kenny
Memorial University
, St. John’s, NL, A1B 3X5 CanadaJ. Pressure Vessel Technol. Aug 2011, 133(4): 041701 (7 pages)
Published Online: May 17, 2011
Article history
Received:
May 13, 2008
Revised:
June 25, 2010
Online:
May 17, 2011
Published:
May 17, 2011
Citation
Al-Showaiter, A., Taheri, F., and Kenny, S. (May 17, 2011). "Effect of Misalignment and Weld Induced Residual Stresses on the Local Buckling Response of Pipelines." ASME. J. Pressure Vessel Technol. August 2011; 133(4): 041701. https://doi.org/10.1115/1.4002858
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