Qian Yuan, Li Wenlong, Wang Xiaopei, Cai Deng'an
Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210034, China.
State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
Polymers (Basel). 2023 Aug 4;15(15):3307. doi: 10.3390/polym15153307.
In this paper, a new multi-part composite frangible cover (MCFC) was designed and fabricated. The frangible cover, manufactured with a traditional manual lay-up method, is designed to conduct a simulated missile launch test using a specially developed test device. A weak zone structure of the composite multi-part frangible cover was designed, and the separation process of the cover was studied by numerical simulation. Based on the strength envelope of the weak zone and the equal-strength design principle, a design method for the weak zone structure of the composite multi-part frangible cover was proposed. A finite element model of the composite multi-part frangible cover was established, and the separation process was numerically simulated and analyzed. Afterward, the verification experiments were carried out. Close agreements between the numerical and experimental results are observed.
本文设计并制造了一种新型多部件复合易碎罩(MCFC)。该易碎罩采用传统手工铺层方法制造,旨在使用专门开发的测试装置进行模拟导弹发射试验。设计了复合多部件易碎罩的薄弱区结构,并通过数值模拟研究了罩的分离过程。基于薄弱区的强度包络和等强度设计原则,提出了复合多部件易碎罩薄弱区结构的设计方法。建立了复合多部件易碎罩的有限元模型,对分离过程进行了数值模拟和分析。随后进行了验证实验。数值结果与实验结果吻合良好。