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Numerical simulation of mechanical stress relieving in a multi-pass GTA girth welded pipe–flange joint to reduce IGSCC.

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Title: Numerical simulation of mechanical stress relieving in a multi-pass GTA girth welded pipe–flange joint to reduce IGSCC.
Authors: Muhammad MS Siddique, Muhammad MA Abid
Source: Modelling & Simulation in Materials Science & Engineering. Dec2005, Vol. 13 Issue 8, p1383-1402. 20p.
Subjects: Residual stresses, Gas tungsten arc welding, Electric welding, Stress corrosion
Abstract: Welding of piping components produces highly non-uniform residual stresses in the weldment which consequently affect material structural response under loading and also expedite origination/propagation of defects such as stress corrosion cracking and brittle fracture. For welding-induced residual stresses, mechanical stress relieving (MSR) is one of the mitigation techniques to improve the service life of pressure vessel components. However, its application to piping systems is rarely reported in the literature. This paper presents a two-dimensional axisymmetric finite element model of a pipe–flange joint subjected to a multi-pass girth welding followed by an MSR process. Sequentially coupled non-linear transient thermo-mechanical analysis for multi-pass gas tungsten arc welding is first performed to calculate welding residual stresses. Subsequently separate parametric studies for three different types of MSR load including internal pressure, external pressure and axial pull are performed on the pre-stressed model, and stress relieving behaviour is studied. It is concluded that both the internal pressure and axial pull have a significant effect on residual stresses on the inner surface of the joint. [ABSTRACT FROM AUTHOR]
Copyright of Modelling & Simulation in Materials Science & Engineering is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 20165177
AccessLevel: 6
PubType: Academic Journal
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  Data: Numerical simulation of mechanical stress relieving in a multi-pass GTA girth welded pipe–flange joint to reduce IGSCC.
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  Data: <searchLink fieldCode="AR" term="%22Muhammad+MS+Siddique%22">Muhammad MS Siddique</searchLink><br /><searchLink fieldCode="AR" term="%22Muhammad+MA+Abid%22">Muhammad MA Abid</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Modelling+%26+Simulation+in+Materials+Science+%26+Engineering%22">Modelling & Simulation in Materials Science & Engineering</searchLink>. Dec2005, Vol. 13 Issue 8, p1383-1402. 20p.
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  Data: <searchLink fieldCode="DE" term="%22Residual+stresses%22">Residual stresses</searchLink><br /><searchLink fieldCode="DE" term="%22Gas+tungsten+arc+welding%22">Gas tungsten arc welding</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+welding%22">Electric welding</searchLink><br /><searchLink fieldCode="DE" term="%22Stress+corrosion%22">Stress corrosion</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Welding of piping components produces highly non-uniform residual stresses in the weldment which consequently affect material structural response under loading and also expedite origination/propagation of defects such as stress corrosion cracking and brittle fracture. For welding-induced residual stresses, mechanical stress relieving (MSR) is one of the mitigation techniques to improve the service life of pressure vessel components. However, its application to piping systems is rarely reported in the literature. This paper presents a two-dimensional axisymmetric finite element model of a pipe–flange joint subjected to a multi-pass girth welding followed by an MSR process. Sequentially coupled non-linear transient thermo-mechanical analysis for multi-pass gas tungsten arc welding is first performed to calculate welding residual stresses. Subsequently separate parametric studies for three different types of MSR load including internal pressure, external pressure and axial pull are performed on the pre-stressed model, and stress relieving behaviour is studied. It is concluded that both the internal pressure and axial pull have a significant effect on residual stresses on the inner surface of the joint. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Modelling & Simulation in Materials Science & Engineering is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1088/0965-0393/13/8/013
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 20
        StartPage: 1383
    Subjects:
      – SubjectFull: Residual stresses
        Type: general
      – SubjectFull: Gas tungsten arc welding
        Type: general
      – SubjectFull: Electric welding
        Type: general
      – SubjectFull: Stress corrosion
        Type: general
    Titles:
      – TitleFull: Numerical simulation of mechanical stress relieving in a multi-pass GTA girth welded pipe–flange joint to reduce IGSCC.
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            NameFull: Muhammad MS Siddique
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            NameFull: Muhammad MA Abid
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              M: 12
              Text: Dec2005
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              Y: 2005
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              Value: 13
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              Value: 8
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