Pultrusion-winding: A novel fabrication method for coreless wound fiber-reinforced thermoset composites with distinct cross-section. (March 2022)

• Record Type: Journal Article
• Authors: Mindermann, Pascal; Witt, Martin-Uwe; Gresser, Götz T.
• Is Part Of: Composites. Volume 154(2022)
• Publication Date: 2022-03
• Subjects: Filament Winding -- Pultrusion -- Thermosetting resin -- Cure; Composite materials -- Periodicals; Manufacturing processes -- Periodicals; Composite materials; Manufacturing processes; Periodicals; 620.11805
• DOI: 10.1016/j.compositesa.2021.106763
• Languages: English
• ISSNs: 1359-835X

Abstract

Highlights: Integration of intermittent UV pultrusion into coreless filament winding. Novel method for improved winding trajectories validated. Fabrication of composites with set cross-sectional shape without molding tools. Abstract: Bar frameworks integrally manufactured by coreless filament winding are often the superior design solution for voluminous component shapes with distinctive load cases. Numerical simulation results must be validated by full-scale tests due to uncertainties in the mesoscale fiber structure. Pultrusion-winding allows to reduce the geometrical uncertainty of the composite without the limiting use of molds. This is achieved by the combination of intermittent ultraviolet pultrusion, coreless filament winding, and a novel tool trajectory creating method. Straight fiber strand segments are directly cured during winding. This defines their cross-sectional shape and decreases surface irregularities. Around winding points, the curing is temporarily discontinued and the fiber strand remains flexible for hooking. The new fabrication method could be validated on a laboratory scale showing improved mechanical performance and reduced fluctuations in fiber volume ratio in comparison to coreless filament winding.