Polyurethane Resins for High-Performance Fibre-Reinforced Composites in Wind Turbine Rotor Blades
Polyurethane composites are used for many applications, but almost exclusively found in non-structural parts. For manufacturing large structural components – like wind turbine rotor blades – sufficient and comparatively long pot life of the resin systems is required. Regarding PU chemistry, one major challenge is the fine-tuning between processability and final performance, since this requires conflictive formulation measures.
A fundamental knowledge build-up of the neat PU resins’ structure-property relationships provides the basis for an optimised formulation regarding the target application ’wind turbine rotor blades’. After establishing PU-specific processing parameters and boundary conditions, fibre reinforced polyurethane composites of high quality are manufactured. These composites are characterised by excellent mechanical properties. Evidence has been shown that damage initiation in PU-composites is – compared to standard epoxy-based materials – shifted to significant higher load levels. Thanks to good fibre matrix adhesion, the PU-resin’s high fracture toughness and fatigue resistance are transferred very well into the laminates. Dynamic damage resistance and tolerance on micro- and macro-level highlight as well the potential for lightweight design of this composite material technology.Lesen Sie die deutsche Zusammenfassung auf Kunststoffe.de
Polyurethane Resins, Fibre Reinforced Composites, Wind Turbine Rotor Blades, Wind Energy, Resin Infusion, Mechanical Properties, Fracture Toughness, Fatigue, Acoustic Emission Analysis
Institute / chair: Fakultät für Ingenieurwissenschaften der Universität Bayreuth
Technical consultant for expert services: Prof. Dr.-Ing. Volker Altstädt (Betreuer), Prof. Dr.-Ing. Peter Mitschang
Publication year: 2016
Provider: Wissenschaftlicher Arbeitskreis Kunststofftechnik (WAK) / Kunststoffe.de
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