Probabilistic fatigue analysis on a central holed thick steel plate of C1 Wedge Connection for wind turbine tower assembling

Ding Liao, Lu Cheng, José Correia*, Milan Veljkovic, Shun Peng Zhu, Jasper Winkes, Koen Creusen, Filippo Berto

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Hole patterns are common in engineering design for connections and/or assembly purposes. Geometrical discontinuities can cause stress concentration in localized areas, making them more prone to fatigue crack initiation and influencing the fatigue life of the overall unit. In the past, much effort has been exerted on fatigue modelling of holed plates from both experimental and theoretical perspectives. However, most studied objects were aluminium or titanium thin plates for aviation purposes. In this work, the fatigue performance of a downscaled holed thick steel plate, extracted from a novel C1 Wedge Connection for wind turbine tower assembling, was tested and categorized according to commonly used industry codes. In particular, the influence of the surface size effect was experimentally observed and computationally discussed. Finally, a probabilistic fatigue model was proposed, which gives a favourable prediction on the fatigue behaviour of the surface polished holed thick steel plate with the help of the Smith–Watson–Topper (SWT) model.

Original languageEnglish
Article number116328
Number of pages290
JournalOcean Engineering
Volume290
DOIs
Publication statusPublished - 2023

Keywords

  • Central hole
  • Life prediction
  • Manufacturing defect
  • Probabilistic fatigue
  • Surface size effect
  • Thick steel plate

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