Wind energy is one of the industries that adopted carbon fibres extensively around the 2010s. As the power generated by a wind turbine is directly proportional to the area overswept by the rotor, blades tend to get longer and have now crossed the 100 m mark (e.g. GE Haliade-X, 12MW / 107m). However, a longer blade also means higher mechanical loads during operation and a higher blade weight.
Side view of the thickest section (120) layers
A technical solution to these two problems is to produce the spar cap – which runs from the root to the tip of the blade and takes up the compressive and tensile loads – with carbon fibres.
April 2019 marks another breakthrough for carbon fiber spar caps produced in VAP® infusion
With the process development from COMPOSYST GmbH, a blade manufacturer in China successfully finished the production of an 87,5 m long carbon fiber spar cap, the longest and widest one made in infusion so far.
The spar cap was infused in VAP® technology with COMPOSYST’s VAP® membrane which enables degassing of the resin during the entire infusion and eases resin distribution throughout the entire part. Furthermore, the double-chamber system created by the VAP® infusion system makes it possible to precisely adjust the amount of resin allowed into the part. This fact, together with the characteristically homogeneous pressure distribution of a VAP® infusion, results in an accurately determined fiber volume fraction that is constant throughout the entire part length.
For the infusion process to run smoothly, the fibre architecture of the preform –especially with regard to its permeability– also plays a decisive role. COMPOSYST worked in close collaboration with the textile experts at SAERTEX in order to select the unidirectional non-crimp fabric with increased z-permeability that was used in this project.
The infusion process itself took less than 2 hours –a record spar cap in record time! After demolding, all parties involved were pleased to inspect a spar cap of virtually perfect built quality.
At the end of the day, VAP® technology is reliable, easy to implement and made this challenging infusion possible whilst delivering a defect-free part.
The DLR Center for Lightweight Production Technology turns 10
On May 15th 2019 the DLR Center for Lightweight Production Technology (ZLP) in Augsburg celebrated its 10-year anniversary. High-ranking guests from different backgrounds (politics, industry and research) took part in the festive colloquium.
“The Center for Lightweight Production Technology has established itself as a strong research partner – not only at regional and national levels, but also within the international sphere – and we are proud of that achievement. Thanks to the consistent digital use of data and the implementation of AI tools, the ZLP Augsburg also opens up new opportunities for lightweight construction, enabling DLR to further expand its position as a technology driver in the future.”
said Klaus Hamacher, Vice Chairman of the Executive Board.
Wir verwenden Cookies, um sicherzustellen, dass Sie die bestmögliche Erfahrung auf unserer Website machen. Wenn Sie mit der Nutzung unsere Website fortfahren, stimmen Sie der Verwendung der Cookies zu. Datenschutzeklärung.