Details
| Original language | English |
|---|---|
| Pages (from-to) | 3161-3178 |
| Number of pages | 18 |
| Journal | Fatigue and Fracture of Engineering Materials and Structures |
| Volume | 46 |
| Issue number | 9 |
| Publication status | Published - 10 Aug 2023 |
Abstract
Biaxial tension/compression–torsion fatigue tests with varying levels of non-proportionality were performed employing a structural adhesive designed for wind turbine rotor blades. The cycles to failure were found to be independent of the level of non-proportionality. It is demonstrated that numerical fatigue life predictions via rainflow-counted equivalent stress histories are not able to replicate these experimental observations and overestimate the fatigue life up to a hundredfold. The tension–compression asymmetry of the adhesive resulted in significant damage prediction differences depending on the stress space representation of the Haigh diagram. If not properly taken care of, the asymmetry will also lead to non-conservative results. While demonstrated with a short fiber-reinforced adhesive, the results can be transferred to other materials.
Keywords
- multiaxial fatigue, non-proportionality, structural adhesives, tension–compression asymmetry, wind turbine rotor blades
ASJC Scopus subject areas
- Materials Science(all)
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
Sustainable Development Goals
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In: Fatigue and Fracture of Engineering Materials and Structures, Vol. 46, No. 9, 10.08.2023, p. 3161-3178.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Effects of non-proportionality and tension–compression asymmetry on the fatigue life prediction of equivalent stress criteria
AU - Kuhn, Michael
AU - Manousides, Nikolas
AU - Antoniou, Alexandros
AU - Balzani, Claudio
N1 - Funding Information: This work was supported by the German Federal Ministry for Economic Affairs and Climate Action (BMWK) in the ReliaBlade project (Grants 0324335A and 0324335B). The authors would like to acknowledge the work of Martina Karalus and Henning Schnellen, who accompanied the fatigue experiments as technicians and implemented the machine code. Open Access funding enabled and organized by Projekt DEAL.
PY - 2023/8/10
Y1 - 2023/8/10
N2 - Biaxial tension/compression–torsion fatigue tests with varying levels of non-proportionality were performed employing a structural adhesive designed for wind turbine rotor blades. The cycles to failure were found to be independent of the level of non-proportionality. It is demonstrated that numerical fatigue life predictions via rainflow-counted equivalent stress histories are not able to replicate these experimental observations and overestimate the fatigue life up to a hundredfold. The tension–compression asymmetry of the adhesive resulted in significant damage prediction differences depending on the stress space representation of the Haigh diagram. If not properly taken care of, the asymmetry will also lead to non-conservative results. While demonstrated with a short fiber-reinforced adhesive, the results can be transferred to other materials.
AB - Biaxial tension/compression–torsion fatigue tests with varying levels of non-proportionality were performed employing a structural adhesive designed for wind turbine rotor blades. The cycles to failure were found to be independent of the level of non-proportionality. It is demonstrated that numerical fatigue life predictions via rainflow-counted equivalent stress histories are not able to replicate these experimental observations and overestimate the fatigue life up to a hundredfold. The tension–compression asymmetry of the adhesive resulted in significant damage prediction differences depending on the stress space representation of the Haigh diagram. If not properly taken care of, the asymmetry will also lead to non-conservative results. While demonstrated with a short fiber-reinforced adhesive, the results can be transferred to other materials.
KW - multiaxial fatigue
KW - non-proportionality
KW - structural adhesives
KW - tension–compression asymmetry
KW - wind turbine rotor blades
UR - http://www.scopus.com/inward/record.url?scp=85161400546&partnerID=8YFLogxK
U2 - 10.1111/ffe.14065
DO - 10.1111/ffe.14065
M3 - Article
AN - SCOPUS:85161400546
VL - 46
SP - 3161
EP - 3178
JO - Fatigue and Fracture of Engineering Materials and Structures
JF - Fatigue and Fracture of Engineering Materials and Structures
SN - 8756-758X
IS - 9
ER -