Concordia Researchers Develop 4D Printing Method for Lightweight Composite Wind Turbine Blades
BY Composights
Published: 15 Jul 2026
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Researchers at Concordia University have developed a novel 4D printing technique for manufacturing composite wind turbine blades that could reduce production costs while delivering lighter, higher-performing blades for small vertical-axis wind turbines.
The research, led by PhD candidate Emad Fakhimi and Professor Suong Van Hoa of the Concordia Centre for Composites, demonstrates a new way of producing curved carbon fiber composite blades from initially flat laminate panels, eliminating the need for complex forming tools.
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Vertical-axis wind turbines are increasingly being deployed in urban environments and on buildings because of their compact footprint. However, manufacturing their curved blades typically requires dedicated molds and specialized forming processes, increasing production complexity, tooling costs, and component weight.
To overcome these challenges, the research team developed what it describes as a first-of-its-kind inverse design methodology. Instead of beginning with a predefined composite layup and evaluating the resulting shape, the researchers started with the target blade geometry and calculated the fiber orientations and laminate stacking sequence required to achieve that shape after manufacturing.
The process relies on 4D printing principles, where flat carbon fiber/epoxy composite laminates naturally transform into three-dimensional curved structures during cooling after curing. The controlled deformation is achieved by engineering the material properties and fiber orientations within the laminate, allowing the desired geometry to emerge without secondary forming operations.
Laboratory testing showed that the resulting composite blades closely replicated the geometry of commercially available aluminum blades while reducing weight by approximately 80%. The lighter composite blades also enabled the test turbines to rotate at higher speeds than comparable turbines equipped with aluminum blades.
The researchers believe the manufacturing approach could simplify production, lower tooling costs, and expand the use of lightweight composite structures across renewable energy systems and other engineering applications requiring complex curved geometries.
The findings have been published in the journal Polymer Composites, highlighting the potential of advanced composite manufacturing and programmable material behavior to improve the performance and manufacturability of next-generation wind energy technologies.
Source: Concordia University | News
