Details
| Original language | English |
|---|---|
| Pages (from-to) | 1121-1139 |
| Number of pages | 19 |
| Journal | Fatigue and Fracture of Engineering Materials and Structures |
| Volume | 46 |
| Issue number | 3 |
| Publication status | Published - 8 Feb 2023 |
Abstract
Axial and torsional fatigue tests at different stress ratios were performed on a structural adhesive designed for wind turbine rotor blades. By employing previously optimized specimens, fatigue properties were recorded without influences of manufacturing-induced defects such as pores. The Stüssi S–N model was an excellent fit to the data and was combined with a Haibach extension line to account for uncertainties in the gigacycle fatigue regime. A comparison of the results with hand-mixed specimens revealed significant and load level-dependent differences, indicating that manufacturing safety factors should be applied to the slope of the S–N curve. The experiments were accompanied by stiffness degradation measurements, which enabled an analysis of Young's and shear modulus degradation interactions. The degradation was modeled using power law fits, which incorporated load level-dependent fitting parameters to allow for a full description of the stiffness reduction and a prediction of the residual fatigue life of run-out specimens.
Keywords
- multiaxial fatigue, porosity, stiffness degradation, structural adhesives, wind turbine rotor blades
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- 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. 3, 08.02.2023, p. 1121-1139.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Fatigue properties of a structural rotor blade adhesive under axial and torsional loading
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 (grant numbers 0324335A, 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 - 2023/2/8
Y1 - 2023/2/8
N2 - Axial and torsional fatigue tests at different stress ratios were performed on a structural adhesive designed for wind turbine rotor blades. By employing previously optimized specimens, fatigue properties were recorded without influences of manufacturing-induced defects such as pores. The Stüssi S–N model was an excellent fit to the data and was combined with a Haibach extension line to account for uncertainties in the gigacycle fatigue regime. A comparison of the results with hand-mixed specimens revealed significant and load level-dependent differences, indicating that manufacturing safety factors should be applied to the slope of the S–N curve. The experiments were accompanied by stiffness degradation measurements, which enabled an analysis of Young's and shear modulus degradation interactions. The degradation was modeled using power law fits, which incorporated load level-dependent fitting parameters to allow for a full description of the stiffness reduction and a prediction of the residual fatigue life of run-out specimens.
AB - Axial and torsional fatigue tests at different stress ratios were performed on a structural adhesive designed for wind turbine rotor blades. By employing previously optimized specimens, fatigue properties were recorded without influences of manufacturing-induced defects such as pores. The Stüssi S–N model was an excellent fit to the data and was combined with a Haibach extension line to account for uncertainties in the gigacycle fatigue regime. A comparison of the results with hand-mixed specimens revealed significant and load level-dependent differences, indicating that manufacturing safety factors should be applied to the slope of the S–N curve. The experiments were accompanied by stiffness degradation measurements, which enabled an analysis of Young's and shear modulus degradation interactions. The degradation was modeled using power law fits, which incorporated load level-dependent fitting parameters to allow for a full description of the stiffness reduction and a prediction of the residual fatigue life of run-out specimens.
KW - multiaxial fatigue
KW - porosity
KW - stiffness degradation
KW - structural adhesives
KW - wind turbine rotor blades
UR - http://www.scopus.com/inward/record.url?scp=85144175757&partnerID=8YFLogxK
U2 - 10.1111/ffe.13925
DO - 10.1111/ffe.13925
M3 - Article
AN - SCOPUS:85144175757
VL - 46
SP - 1121
EP - 1139
JO - Fatigue and Fracture of Engineering Materials and Structures
JF - Fatigue and Fracture of Engineering Materials and Structures
SN - 8756-758X
IS - 3
ER -