Abstract
Computational and analytical studies of degradation of wind turbine blade materials at the macro-, micro-, and nanoscale carried out by the modelling team of the Section Composites and Materials Mechanics, Department of Wind Energy, DTU, are reviewed. Examples of the analysis of the microstructural effects on the strength and fatigue life of composites are shown. Computational studies of degradation mechanisms of wind blade composites under tensile and compressive loading are presented. The effect of hybrid and nanoengineered structures on the performance of the composite was studied in computational experiments as well.
Highlights
The perspectives of utilization and expansion of wind energy technology depend on the reliability and lifetime of wind turbines
Degradation processes in wind turbine blades are controlled by microscale processes in the materials [1]
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
Summary
The perspectives of utilization and expansion of wind energy technology depend on the reliability and lifetime of wind turbines. Degradation processes in wind turbine blades are controlled by microscale processes in the materials [1]. The mechanical behavior and strength of materials can be studied as a function of their microstructures using numerical models based on the computational micro- and mesomechanics of the materials. Understanding the degradation mechanisms of wind blades as a function of their structures, and the prediction of the lifetime and performance of wind blades. 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. We develop computational models of hybrid and nanoengineered composites (Section 5) and estimate the effect of these structures on the composite performance and lifetime.
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