Nanomodifizierte Klebstoffsysteme - Materialverhalten unter realistischen Einsatzbedingungen und fertigungstechnische Aspekte

Abstract

The aim of this thesis is to develop an adhesive system for the production of wind turbine rotor blades. In addition to the manufacturing aspects, the focus is on mechanical performance under realistic operating conditions. An epoxy resin-based wind energy resin system is used for the adhesive development. In addition, boehmite nanoparticles and short glass fibers are introduced into the resin system as reinforcing fillers. In the course of the paper, the thermal properties (glass transition temperature, crosslinking kinetics, viscosity and thixotropy effect) of the resin system are investigated as a function of the fillers and after water addition. The mechanical performance under static load is examined by means of tensile tests (stiffness, strength and elongation at break). In this context, only minor property degradation due to storage under warm and humid climatic conditions is detected. Furthermore, the adhesives are examined statically (tensile shear strength as a function of adhesive layer thickness) and dynamically (Wöhler curves as a function of temperature) on the basis of overlap bondings. The mechanical properties are evaluated using a comparison with a commercial wind power adhesive. The results have shown that the developed adhesive comes close to the commercial adhesive in terms of both, manufacturing aspects and mechanical properties.