Abstract
In recent years, with the development of aerospace field, composite materials show its importance and particularity in many fields and have a wide range of application potential because of its light weight structure. The application of composite materials to UAV blades can reduce the structural weight and improve the impact resistance. The mechanical properties, damage performance and failure mechanism of laminate under high strain rate are the fundaments for high-speed impact mechanics analysis. In this paper, a kind of fiber composite blade is designed independently, and the optimal laying angle is determined. Fluent is selected as the CFD calculation software to carry out the fluid–solid coupling analysis of the composite fixed wing. By changing the wing angle (0°, 10°, 17°, 24°), the flutter performance of the fixed wing under the condition of 45 m/s velocity flow is studied. The results show that the laminated laminate designed in this paper has longer action time under impact load, better protection for structure and better effect of resisting impact, and the trend and inflection point of stress and deformation of fixed wing are similar. Flutter occurs, the stress on the lower side of the fixed wing is larger than that on the upper side, and the stress on the outside is larger than that on the inside, and with the increase of time, the stress gradually spreads to both sides along the direction of the fixed wing. There is no correlation between the stress and strain of the fixed blade, and there is a threshold for the wing angle. When the wing angle is 10°, the blade has the smallest strain and the strongest wind resistance.























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Acknowledgements
I would first like to thank Professor Zongjie Cao for his guiding comments and suggestions on the research direction of my dissertation, and for his timely and attentive guidance on the difficulties and doubts I encountered during the writing of my dissertation, and for his many helpful suggestions for improvement. In addition, I am greatly inspired by the strong support and help provided by Yang Shuai in the preparation of the thesis. I would also like to thank the authors in the references, through their research articles, which gave me a good starting point for my research topic.
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Yu, L., Cao, Z. & Yang, S. Aerodynamics and blade flutter intelligent simulation of propeller vehicle under different wing angle. Int J Syst Assur Eng Manag 14, 657–669 (2023). https://doi.org/10.1007/s13198-021-01457-5
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DOI: https://doi.org/10.1007/s13198-021-01457-5