[article]
| Titre : |
Polyuréthane composites for wind turbine blades |
| Type de document : |
texte imprimé |
| Auteurs : |
U. E. Younes, Auteur ; Frank W. Bradish, Auteur |
| Année de publication : |
2012 |
| Article en page(s) : |
p. 30-37 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Composites thermoplastiques
Composites thermoplastiques -- Propriétés mécaniques
Eoliennes -- Matériaux
Epoxydes
Essais dynamiques
Esters de polyvinyle
Gélifiants
Pales d'éoliennes
Polyuréthanes
Résistance à la rupture
Ressources renouvelables
Rhéologie
Traction (mécanique)
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
The wind power industry's move toward developing and manufacturing longer, larger, more productive wind blades requires advances in composites technologies used in their construction. Bayer MaterialScience, LLC developed a new class of stronger and tougher composite materials for the manufacture of 1.5+ MW turbine wind blades. These new low-viscosity, long-gelling VOCs, sustainable raw materials from renewable resources (soy), faster infusion times, and superior tensile fatigue,interlaminar fracture toughness and fatigue crack growth. For example, in tensile fatigue the polyurethane-based composite outperformed VE and epoxy by as much as 9 and 14.8 order of magnitudes. Whereas, at a peak load of 10000 psi the epoxy fractured at 93216 cycles and the VE at 57507 cycles, while the polyurethane fractured only after 849881 cycles. Additionally, in interlaminar fracture toughness testing (G1C), the polyurethane composite with its stable delamination G1C value of 3798 j/m2 outperformed epoxy by a factor of 2, and the vinyl ester by approximately a factor of 3. Similarly, the polyurethane outperformed both the epoxy and vinyl ester samples in fatigue crack growth testing at all stress values.
In this paper we will discuss the development of this new polyurethane class of resins and its implication in the manufacture of large wind turbine blades, and compare its performance in composite systems to systems made from epoxy and vinyl ester. |
| Note de contenu : |
- EXPERIMENTATION : Composite preparation for testing - Long flow, thin laminate infusion trials - Production part scale-up infusion trials
- TEST PROCEDURES
- RESULTS : System development and viscosity - Neat resin properties - Fatigue - Interlaminar fracture toughness - G1C - SEM - Static load deflection of root rings - Flow rate |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16499 |
in SAMPE JOURNAL > Vol. 48, N° 6 (11-12/2012) . - p. 30-37
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