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

doi:10.1016/j.engstruct.2020.111325

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

Villum Center for Advanced Structural and Material Testing

R&D A/S

Research output: Contribution to journal › Journal article › Research › peer-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 language	English
Article number	111325
Journal	Engineering Structures
Volume	226
Number of pages	10
ISSN	0141-0296
DOIs	https://doi.org/10.1016/j.engstruct.2020.111325
Publication status	Published - 2021

Keywords

Structural fatigue tests
Flexural loading
Multiaxial fatigue
Wind turbine blades

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10.1016/j.engstruct.2020.111325

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CASMaT: Villum Center for Advanced Structural and Material Testing
Stang, H. (Project Manager), Kleis, C. (Project Participant), Mikkelsen, L. P. (Project Participant), Sørensen, B. F. (Project Participant), Toftegaard, H. (Project Participant), Berggreen, C. (Project Participant), Branner, K. (Project Participant), Michel, A. (Project Participant), Andreassen, M. J. (Project Participant), Luczak, M. (Project Participant), Chen, X. (Project Participant), Bjørnbak-Hansen, J. (Project Participant), Legarth, B. N. (Project Participant), Waldbjørn, J. P. (Project Participant), Bangaru, A. K. (PhD Student), Moncy, A. (PhD Student) & Quinlan, A. R. (PhD Student)
07/11/2017 → …
Project: Research

Cite this

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title = "Bending-moment-based approach to match damage-equivalent strains in fatigue testing",

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.",

keywords = "Structural fatigue tests, Flexural loading, Multiaxial fatigue, Wind turbine blades",

author = "Oscar Castro and Peter Berring and Kim Branner and Hvejsel, {Christian Frier} and Yeniceli, {S{\"u}leyman Cem} and Federico Belloni",

year = "2021",

doi = "10.1016/j.engstruct.2020.111325",

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journal = "Engineering Structures",

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AU - Castro, Oscar

AU - Berring, Peter

AU - Branner, Kim

AU - Hvejsel, Christian Frier

AU - Yeniceli, Süleyman Cem

AU - Belloni, Federico

PY - 2021

Y1 - 2021

N2 - 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.

AB - 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.

KW - Structural fatigue tests

KW - Flexural loading

KW - Multiaxial fatigue

KW - Wind turbine blades

U2 - 10.1016/j.engstruct.2020.111325

DO - 10.1016/j.engstruct.2020.111325

M3 - Journal article

SN - 0141-0296

VL - 226

JO - Engineering Structures

JF - Engineering Structures

M1 - 111325

ER -

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

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Keywords

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CASMaT: Villum Center for Advanced Structural and Material Testing

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