Exploration of processability limitations of fiber placement and thickness stacking optimization of thermoplastic c  

作　　者：Xiaolong Yu Dajun Huan Jun Xiao Yong Li 

机构地区：[1]Department of Materials Science and Engineering,Nanjing University of Aeronautics and Astronautics,No.29,Yudao Street,Qinhuai District,Nanjing City,Jiangsu Province 210016,China

出　　处：《Aerospace Traffic and Safety》2024年第2期119-130,共12页空天交通与安全(英文)

基　　金：This work was supported by Special Funds of 2023 Jiangsu Provincial Science and Technology Plan(First Batch of Innovation Capacity Building Plan)[No.ZAG23009].

摘　　要：Hydrogen-powered aircraft,as a cutting-edge exploration of clean-energy air transportation,impose more stringent requirements for lightweight hydrogen storage due to the limitations of aircraft weight and volume.Composite hydrogen storage cylinders have become one of the preferred solutions for hydrogen storage systems in hydrogen-powered aircraft due to their light weight and high strength.However,during the automated placement of high-stiffness thermoplastic composites(T700/PEEK),fibers may buckle or break in the head section.As the head radius decreases,the overlap of adjacent tows increases,resulting in an increase in the thickness of the polar pores,which is contrary to the light-weighting requirements.To solve this problem,this paper derives the trajectory algorithm as a manufacturing process limitation when thermoplastic fiber bundles are laid without wrinkles,provides a definition of the overlap rate between adjacent fibers,and the effect of different ellipsoid ratios of head profile changes on the overlap of fiber bundles is investigated.The larger the ellipsoid ratio of the prolate ellipsoid is,the smaller the overlap of gaps generated by neighboring fiber bundles is,and the overlap at the pole holes is also smaller,while the change of the oblate ellipsoid is not significant.The prolate ellipsoid has greater application and research value than the oblate ellipsoid in terms of processability,which is of great research significance for the design and fabrication of thermoplastic composite hydrogen storage cylinders for hydrogen-powered aircraft.

关 键 词：Hydrogen storage cylinders head Thermoplastic prepreg deformation Fiber placement path planning Structural optimization Stacking thickness 

分 类 号：TB3[一般工业技术—材料科学与工程]