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Modelling framework for 3D fatigue crack propagation in welds of offshore steel structures

Jie Zhang, Stijn Hertelé (UGent) , Nahuel Micone (UGent) and Wim De Waele (UGent)
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Abstract
Fatigue is a common failure mechanism of welds in offshore structures. Their lifetime prediction is hampered by a large number of influence factors related to weld (e.g., residual stresses) and environment (e.g., variable amplitude loading, hydrogen embrittlement). These challenges (among others) are tackled in the Flemish research programme MaDurOS. This paper describes an extended finite element method (XFEM) based framework, developed within the scope of this programme. It allows to include weld and environment related aspects into the numerical lifetime prediction of welded structures. This paper focuses on the three-dimensional nature of crack propagation predictions. A numerical optimization and benchmark validation are discussed to illustrate the possibilities of the framework. In future work, the developed software will be coupled with residual stress in the welds and hydrogen embrittlement and be validated with experimental input/output, allowing to evaluate the ability of numerical tools for weld lifetime predictions in offshore fatigue conditions.
Keywords
3D fatigue crack propagation, offshore steel, extended finite element method, weld

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MLA
Zhang, Jie, et al. “Modelling Framework for 3D Fatigue Crack Propagation in Welds of Offshore Steel Structures.” IRF2016: 5TH INTERNATIONAL CONFERENCE INTEGRITY-RELIABILITY-FAILURE, edited by Joaquim Silva Gomes and Shaker Meguid, INEGI/FEUP (2016), 2016, pp. 751–62.
APA
Zhang, J., Hertelé, S., Micone, N., & De Waele, W. (2016). Modelling framework for 3D fatigue crack propagation in welds of offshore steel structures. In J. Silva Gomes & S. Meguid (Eds.), IRF2016: 5TH INTERNATIONAL CONFERENCE INTEGRITY-RELIABILITY-FAILURE (pp. 751–762). INEGI/FEUP (2016).
Chicago author-date
Zhang, Jie, Stijn Hertelé, Nahuel Micone, and Wim De Waele. 2016. “Modelling Framework for 3D Fatigue Crack Propagation in Welds of Offshore Steel Structures.” In IRF2016: 5TH INTERNATIONAL CONFERENCE INTEGRITY-RELIABILITY-FAILURE, edited by Joaquim Silva Gomes and Shaker Meguid, 751–62. INEGI/FEUP (2016).
Chicago author-date (all authors)
Zhang, Jie, Stijn Hertelé, Nahuel Micone, and Wim De Waele. 2016. “Modelling Framework for 3D Fatigue Crack Propagation in Welds of Offshore Steel Structures.” In IRF2016: 5TH INTERNATIONAL CONFERENCE INTEGRITY-RELIABILITY-FAILURE, ed by. Joaquim Silva Gomes and Shaker Meguid, 751–762. INEGI/FEUP (2016).
Vancouver
1.
Zhang J, Hertelé S, Micone N, De Waele W. Modelling framework for 3D fatigue crack propagation in welds of offshore steel structures. In: Silva Gomes J, Meguid S, editors. IRF2016: 5TH INTERNATIONAL CONFERENCE INTEGRITY-RELIABILITY-FAILURE. INEGI/FEUP (2016); 2016. p. 751–62.
IEEE
[1]
J. Zhang, S. Hertelé, N. Micone, and W. De Waele, “Modelling framework for 3D fatigue crack propagation in welds of offshore steel structures,” in IRF2016: 5TH INTERNATIONAL CONFERENCE INTEGRITY-RELIABILITY-FAILURE, Porto, Portugal, 2016, pp. 751–762.
@inproceedings{8055947,
  abstract     = {{Fatigue is a common failure mechanism of welds in offshore structures. Their lifetime prediction is hampered by a large number of influence factors related to weld (e.g., residual stresses) and environment (e.g., variable amplitude loading, hydrogen embrittlement). These challenges (among others) are tackled in the Flemish research programme MaDurOS. This paper describes an extended finite element method (XFEM) based framework, developed within the scope of this programme. It allows to include weld and environment related aspects into the numerical lifetime prediction of welded structures. This paper focuses on the three-dimensional nature of crack propagation predictions. A numerical optimization and benchmark validation are discussed to illustrate the possibilities of the framework. In future work, the developed software will be coupled with residual stress in the welds and hydrogen embrittlement and be validated with experimental input/output, allowing to evaluate the ability of numerical tools for weld lifetime predictions in offshore fatigue conditions.}},
  author       = {{Zhang, Jie and Hertelé, Stijn and Micone, Nahuel and De Waele, Wim}},
  booktitle    = {{IRF2016: 5TH INTERNATIONAL CONFERENCE INTEGRITY-RELIABILITY-FAILURE}},
  editor       = {{Silva Gomes, Joaquim and Meguid, Shaker}},
  isbn         = {{978-989-98832-5-3}},
  keywords     = {{3D fatigue crack propagation,offshore steel,extended finite element method,weld}},
  language     = {{eng}},
  location     = {{Porto, Portugal}},
  pages        = {{751--762}},
  publisher    = {{INEGI/FEUP (2016)}},
  title        = {{Modelling framework for 3D fatigue crack propagation in welds of offshore steel structures}},
  year         = {{2016}},
}

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