Non-linear bending compliance of thin ply composite beams by local compression flange buckling
F. Schadt (University of Applied Sciences and Arts Northwestern Switzerland)
M. Rueppel (University of Applied Sciences and Arts Northwestern Switzerland)
C. Brauner (University of Applied Sciences and Arts Northwestern Switzerland)
Y. Courvoisier (ENATA Industries FZE)
K. Masania (TU Delft - Aerospace Manufacturing Technologies, University of Applied Sciences and Arts Northwestern Switzerland)
C.A. Dransfeld (TU Delft - Aerospace Manufacturing Technologies, University of Applied Sciences and Arts Northwestern Switzerland)
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Abstract
Passive spanwise bending shape-adaption has the potential to increase the efficiency and manoeuvrability of vehicles with wing-like structures. By utilisation of compression flange buckling, the in-plane stiffness can be tuned to design beams with contrasting pre-buckling and post-buckling bending stiffness. The investigated concept is experimentally validated using a thin-ply laminated composite four-point bending beam, which is designed to experience compression flange buckling in the span with constant moment. The bending stiffness was reduced by more than 41% after the onset of buckling which shows the effectiveness of compression flange buckling for non-linear bending compliance.
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