Bending-moment-based approach to match damage-equivalent strains in fatigue testing

Oscar Castro*, Peter Berring, Kim Branner, Christian Frier Hvejsel, Süleyman Cem Yeniceli, Federico Belloni

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A bending-moment-based approach that matches with damage-equivalent strains in fatigue testing of beam-like structures, such as wind turbine blades, is proposed in this study. A modified bending moment variable, which is proportional to longitudinal strains developed in beams when subjected to pure bending moments, is first defined. This variable is then used to develop the proposed fatigue approach, which considers the effect of combined loads on the response of the structure at the material level. The proposed approach only requires, as inputs, the bending moments applied to the structure and the ratio between the cross-section stiffnesses.
Original languageEnglish
Article number111325
JournalEngineering Structures
Volume226
Number of pages10
ISSN0141-0296
DOIs
Publication statusPublished - 2021

Keywords

  • Structural fatigue tests
  • Flexural loading
  • Multiaxial fatigue
  • Wind turbine blades

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