Computational Modelling of Materials for Wind Turbine Blades: Selected DTU Wind Energy Activities
Abstract
:1. Introduction
- ○
- Understanding the degradation mechanisms of wind blades as a function of their structures, and the prediction of the lifetime and performance of wind blades. For this, we estimate the loads on the wind blades (Section 2), and develop the micromechanical models of wind blade composite degradation at the level of fibers and bundles under tensile (Section 3) and compressive (Section 4) loading.
- ○
- Exploring the promising ways to optimize the wind blade performance by tailoring the materials’ structures. Here, we develop computational models of hybrid and nanoengineered composites (Section 5) and estimate the effect of these structures on the composite performance and lifetime.
2. Loads on the Wind Blades and Stresses in the Material
2.1. Loads on a Wind Blade
2.2. Stresses in a Wind Blade
3. Three Dimensional Modelling of Composite Degradation under Tensile Loading
3.1. Computational Modelling of Micromechanisms of Degradation of Wind Blade Composites
3.2. Fiber Bundle Modelling with an Experimentally-Determined Fiber Distribution
4. Compressive Strength of Wind Turbine Composites
4.1. Statistical Model of Compressive Damage Evolution
4.2. Effect of Local Fiber Misalignment and Wrinkles on Compression Strength of the Composite
5. Computational Modelling of Hybrid and Hierarchical Composites
5.1. Modellling of Hybrid Composites
5.2. Nanoengineered Composites
6. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Bundle | Number of Fibers | Average Fiber Diameter | Total Bundle Area | Total Fiber Area | Local Fiber Volume Fraction | Estimate Tex-Value |
---|---|---|---|---|---|---|
0° | 5954 | 15.8 µm | 1.926 mm2 | 1.197 mm2 | 0.62 | 3113 |
45° | 794 | 14.9 µm | 0.245 mm2 | 0.142 mm2 | 0.58 | 369 |
90° | 375 | 15.4 µm | 0.125 mm2 | 0.071 mm2 | 0.57 | 185 |
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Mikkelsen, L.P.; Mishnaevsky Jr., L. Computational Modelling of Materials for Wind Turbine Blades: Selected DTU Wind Energy Activities. Materials 2017, 10, 1278. https://doi.org/10.3390/ma10111278
Mikkelsen LP, Mishnaevsky Jr. L. Computational Modelling of Materials for Wind Turbine Blades: Selected DTU Wind Energy Activities. Materials. 2017; 10(11):1278. https://doi.org/10.3390/ma10111278
Chicago/Turabian StyleMikkelsen, Lars Pilgaard, and Leon Mishnaevsky Jr. 2017. "Computational Modelling of Materials for Wind Turbine Blades: Selected DTU Wind Energy Activities" Materials 10, no. 11: 1278. https://doi.org/10.3390/ma10111278