Consideration of weld distortion throughout the identification of fatigue curve parameters using mean stress correction

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Abstract

The effect of weld angular distortion on fatigue test specimens cut from butt welded plates is investigated by experimental and numerical methods. The weld specimens are made of a structural steel equivalent to BS 4360 grade 50D. The SN curve obtained from experimental data is used with the fatigue post-processor nCode DesignLife for fatigue life prediction. Mean stress correction is applied using the FKM approach to address the component of bending stress induced by clamping the distorted specimen, which is constant during the fatigue test. A parameter identification procedure for the SN curve and mean stress correction is proposed. The weld SN curve evaluated using the procedure is compared to the generic weld SN curves provided in the material database of nCode DesignLife and discussed.
Original languageEnglish
Title of host publicationFATIGUE 2017
Subtitle of host publicationProceedings of the 7th Engineering Integrity Society International Conference on Durability & Fatigue
EditorsP. Bailey, F. Berto, E.R. Cawte, P. Roberts, M.T. Whittaker, J.R. Yates
Place of PublicationRutland
Pages366-377
Number of pages11
ISBN (Electronic)9780954436834
Publication statusPublished - 30 Jun 2017
EventEIS Fatigue 2017: 7th Engineering Integrity Society International Conference on Durability & Fatigue - Downing College, Cambridge, United Kingdom
Duration: 3 Jul 20175 Jul 2017
http://www.fatigue2017.com/

Conference

ConferenceEIS Fatigue 2017
Abbreviated titleEIS Fatigue 2017
CountryUnited Kingdom
CityCambridge
Period3/07/175/07/17
Internet address

Keywords

  • fatigue
  • weld
  • mean stress correction
  • SN curve

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    POTF: WeirSPM Pump of the Future PowerFrame

    Gorash, Y., Comlekci, T. & MacKenzie, D.

    1/04/1431/08/14

    Project: Knowledge Exchange

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    • 2 Conference Contribution
    • 1 Article
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  • 1 Citation (Scopus)
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    Cite this

    Gorash, Y., Zhou, X., Comlekci, T., Mackenzie, D., & Bayyouk, J. (2017). Consideration of weld distortion throughout the identification of fatigue curve parameters using mean stress correction. In P. Bailey, F. Berto, E. R. Cawte, P. Roberts, M. T. Whittaker, & J. R. Yates (Eds.), FATIGUE 2017: Proceedings of the 7th Engineering Integrity Society International Conference on Durability & Fatigue (pp. 366-377).