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Enhanced buckling performance of a stiffened, variable angle tow thermoplastic composite panel
Telford, Robert; Peeters, Daniël; Oliveri, Vincenzo; Zucco, Giovanni; Jones, David; O'Higgins, Ronan M.; Weaver, Paul M.
Variable stiffness composites are exciting emerging structures capable of improving structural performance through tailored load redistribution. This technology is particularly relevant to aerospace structures, such as aircraft wings, which rely on stressed skins to resist compressive, buckling loads. Variable Angle Tow (VAT) composite laminates manufactured via tow steering can increase buckling capacity of composite structures, leading to reduce material weight and costs. Numerical models have progressed to the point whereby this technology can be explored for complex aerospace structures. Further progress can be made through incorporating the latest manufacturing methods with simple and representative testing techniques to analyze buckling performance and benchmark numerical models. This work aims to analyze the buckling performance of a stiffened VAT panel using a novel test method. Laser assisted tape placement is used to manufacture the panel using thermoplastic composite tape, improving manufacturing accuracy and speed. The buckling response of this component is then tested using a newly developed three-point bending test method. The test method was designed using finite element models, experimentally validated, and the results were compared against a numerical model (based on the Ritz approach). It was found that the developed test can produce buckling in the skin, with the buckling mode matching that of the numerical model.
Keyword(s): Variable Angle Tow (VAT); buckling performance
Publication Date:
2018
Type: Conference item
Peer-Reviewed: Yes
Language(s): English
Institution: University of Limerick
Funder(s): Science Foundation Ireland
Citation(s): AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference AIAA SciTech Forum;(AIAA 2018-0480)
https://doi.org/10.2514/6.2018-0480
15/RP/2773
Publisher(s): American Institute of Aeronautics and Astronautics: AIAA
First Indexed: 2018-01-31 06:37:11 Last Updated: 2018-03-24 06:38:16