Numerical investigation of residual stresses and distortions due to multi-pass welding in a pipe-flange joint

M Abid, M J Qarni

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This paper presents a numerical simulation for examining temperature fields, residual stresses, and distortions in multi-pass welding of a pipe-flange joint. A sequentially coupled transient non-linear thermo-mechanical three-dimensional finite-element model is developed to simulate four-pass tungsten inert gas welding process. An ANSI class 300# flange is welded with a 6 mm thick, 200 mm long, and 100 mm nominal diameter pipe, using a single V-groove butt joint with a 1.2 mm root opening. Goldak’s double ellipsoidal model is used for the weld heat source, and inactive element addition technique is used for the addition of weld filler elements. Axial and hoop residual stresses and out-of-plane distortions along the flange face are plotted. In addition, welding start and end effects are discussed.
Original languageEnglish
Pages (from-to)253-267
Number of pages15
JournalProceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering
Volume224
Issue number1
DOIs
Publication statusPublished - 1 Nov 2010

Fingerprint

Flanges
Residual stresses
Welding
Pipe
Welds
Inert gas welding
Chemical elements
Tungsten
Fillers
Temperature distribution
Computer simulation

Keywords

  • multi-pass welding
  • finite-element analysis
  • pipe-flange joint
  • residual stress
  • distortions

Cite this

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N2 - This paper presents a numerical simulation for examining temperature fields, residual stresses, and distortions in multi-pass welding of a pipe-flange joint. A sequentially coupled transient non-linear thermo-mechanical three-dimensional finite-element model is developed to simulate four-pass tungsten inert gas welding process. An ANSI class 300# flange is welded with a 6 mm thick, 200 mm long, and 100 mm nominal diameter pipe, using a single V-groove butt joint with a 1.2 mm root opening. Goldak’s double ellipsoidal model is used for the weld heat source, and inactive element addition technique is used for the addition of weld filler elements. Axial and hoop residual stresses and out-of-plane distortions along the flange face are plotted. In addition, welding start and end effects are discussed.

AB - This paper presents a numerical simulation for examining temperature fields, residual stresses, and distortions in multi-pass welding of a pipe-flange joint. A sequentially coupled transient non-linear thermo-mechanical three-dimensional finite-element model is developed to simulate four-pass tungsten inert gas welding process. An ANSI class 300# flange is welded with a 6 mm thick, 200 mm long, and 100 mm nominal diameter pipe, using a single V-groove butt joint with a 1.2 mm root opening. Goldak’s double ellipsoidal model is used for the weld heat source, and inactive element addition technique is used for the addition of weld filler elements. Axial and hoop residual stresses and out-of-plane distortions along the flange face are plotted. In addition, welding start and end effects are discussed.

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KW - finite-element analysis

KW - pipe-flange joint

KW - residual stress

KW - distortions

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JO - Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering

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