Predicting multiaxial stiffness degradation using uniaxial data: A model based on non-proportional experiments on a structural adhesive

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

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  • Technical University of Denmark
  • TPI Composites Germany GmbH
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OriginalspracheEnglisch
Aufsatznummer109240
FachzeitschriftInternational journal of fatigue
Jahrgang202
Frühes Online-Datum20 Aug. 2025
PublikationsstatusVeröffentlicht - Jan. 2026

Abstract

In this work, multiaxial experiments on a structural adhesive with varying levels of non-proportionality are analyzed with a focus on the stiffness degradation process. A load level-dependent stiffness degradation model is employed that captures both, Young’s and shear modulus degradation. It was found that a multiaxial stiffness degradation can be modeled with good approximation as a superposition of the uniaxial stiffness degradations. Furthermore, the results indicate an insignificant influence of the level of non-proportionality on both Young’s and shear modulus degradation for the analyzed short fiber-reinforced adhesive.

Schlagwörter

    Steifigkeitsdegradation, multiaxiale Ermüdung, Nicht-Proportionalität, Strukturklebstoff, Rotorblatt, Windenergie, Windenergieanlage

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Predicting multiaxial stiffness degradation using uniaxial data: A model based on non-proportional experiments on a structural adhesive. / Kuhn, Michael; Eder, Martin A.; Krimmer, Alexander et al.
in: International journal of fatigue, Jahrgang 202, 109240, 01.2026.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

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title = "Predicting multiaxial stiffness degradation using uniaxial data: A model based on non-proportional experiments on a structural adhesive",
abstract = "In this work, multiaxial experiments on a structural adhesive with varying levels of non-proportionality are analyzed with a focus on the stiffness degradation process. A load level-dependent stiffness degradation model is employed that captures both, Young{\textquoteright}s and shear modulus degradation. It was found that a multiaxial stiffness degradation can be modeled with good approximation as a superposition of the uniaxial stiffness degradations. Furthermore, the results indicate an insignificant influence of the level of non-proportionality on both Young{\textquoteright}s and shear modulus degradation for the analyzed short fiber-reinforced adhesive.",
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author = "Michael Kuhn and Eder, {Martin A.} and Alexander Krimmer and Claudio Balzani",
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T2 - A model based on non-proportional experiments on a structural adhesive

AU - Kuhn, Michael

AU - Eder, Martin A.

AU - Krimmer, Alexander

AU - Balzani, Claudio

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KW - Wind turbine rotor blades

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KW - multiaxiale Ermüdung

KW - Nicht-Proportionalität

KW - Strukturklebstoff

KW - Rotorblatt

KW - Windenergie

KW - Windenergieanlage

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