内凹弧形蜂窝夹芯板低速弹道冲击试验与数值仿真  

Low-speed ballistic impact test and numerical simulation on re-entrant circular honeycomb sandwich panels

作　　者：杨姝[1,2] 陈鹏宇 江峰 裴连政 亓昌 YANG Shu;CHEN Pengyu;JIANG Feng;PEI Lianzheng;QI Chang(State Key Laboratory of Structural Analysis for Industrial Equipment,School of Automotive Engineering,Dalian University of Technology,Dalian 116024,China;Ningbo Research Institute,Dalian University of Technology,Ningbo 315016,China)

机构地区：[1]大连理工大学汽车工程学院工业装备结构分析国家重点实验室,辽宁大连116024 [2]大连理工大学宁波研究院,浙江宁波315016

出　　处：《振动与冲击》2023年第6期255-262,297,共9页Journal of Vibration and Shock

基　　金：国家重点研发计划(2021YFB3702004);中央高校基本科研业务费项目(DUT20LAB132,DUT21GF203)。

摘　　要：面向弹道冲击防护,设计制备了1060铝合金材质的内凹弧形(re-entrant circular,REC)和传统内凹(re-entrant,RE)六边形蜂窝夹芯板。采用钢质圆柱弹低速冲击试验结合有限元数值仿真,研究对比了两类蜂窝夹芯板的低速弹道冲击动态响应与防护性能。进而,利用经验证的有限元模型,仿真分析着靶速度对两类蜂窝夹芯板的低速弹道冲击最大永久压缩量、局部泊松比值和各部件吸能占比的影响。最后,分析了REC蜂窝胞元的圆弧胞壁半径、胞元长度等结构参数对夹芯板低速弹道冲击响应的影响。结果表明:相比RE蜂窝,REC蜂窝夹芯板在相同弹道冲击载荷下最大永久压缩量更小,抗弹性能更优,并且低速下优势更显著;随着胞元长度和圆弧胞壁半径减小,REC蜂窝夹芯板的抗弹性能可进一步提升。For ballistic impact protection,1060 aluminum alloy re-entrant circular(REC)and traditional re-entrant(RE)hexagonal honeycomb sandwich panels were designed and fabricated.The dynamic responses and protection performances of two types of honeycomb sandwich panels under low-speed ballistic impact load were studied by using the steel cylindrical projectile low-speed impact test and finite element(FE)numerical simulation and the results were compared.Using a verified FE model,the effects of ballistic speed on the maximum permanent compression,local Poisson’s ratio and energy absorption partition of the two types of honeycomb sandwich panels under low-speed ballistic impact were simulated and analyzed.The effects of structural parameters such as the circular cell wall radius and cell length of the REC honeycomb cell on the low-speed ballistic impact responses of the sandwich panels were studied.The results show that compared with RE honeycomb,REC honeycomb sandwich panel has smaller maximum permanent compression and better ballistic performances under the same ballistic impact load,and the advantage is more obvious at low speed;with the decrease of the cell length and circular cell wall radius,the ballistic performances of the REC honeycomb sandwich panel can be further improved.

关 键 词：蜂窝材料 夹芯板 弹道冲击 负泊松比 数值仿真 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3