Improved shielding structure with double honeycomb cores for hyper-velocity impact
Improved shielding structure with double honeycomb cores for hyper-velocity impact
复制标题
改进的屏蔽结构，具有双蜂窝芯，可实现超高速冲击
DOI：
10.1016/j.mechrescom.2015.06.003
复制
发表时间：
2015-10-01
影响因子：
2.4
通讯作者：
Zhang, Xiong
中科院分区：
文献类型：
--
作者：
Liu, Ping;Liu, Yan;Zhang, Xiong
双蜂窝夹芯铝合金夹层板可以作为空间碎片超高速撞击防护结构。本文对双层蜂窝夹芯板进行了改进和研究。与原结构不同的是，中间饰板的横向位置发生变化，而不是在面板的右中部。采用基于点的内部结构模型和材料点法，数值研究了横向位置的影响。当中间面与前面之间的距离在等效屏蔽距离附近时，可以获得更好的屏蔽性能。等效屏蔽距离被定义为碎片碎片在与蜂窝单元壁相互作用之前可以在横向方向上行进的最大距离。同时还讨论了面元的形貌和剩余能量。根据仿真结果，提出了一种具有多个中间面板的新型屏蔽结构，大大提高了屏蔽能力。(C)2015爱思唯尔有限公司版权所有。
Aluminum sandwich panel made from double honeycomb cores can serve as a cost-effective shielding structure against hyper-velocity impact of space debris. The double honeycomb sandwich panel is improved and investigated in detail in this paper. Different from the original structure, the transverse position of the intermediate facesheet is varied instead of at the right middle of the panel. The influence of the transverse position is investigated numerically with point-based internal-structure model and material point method. Much better shielding performance can be obtained when the distance between the intermediate facesheet and the front facesheet is around the equivalent shielding distance. The equivalent shielding distance is defined as the maximum distance the debris fragments can travel in transverse direction before they interact with honeycomb cell walls. The morphologies of the facesheets and the residual energy are also discussed. A new shielding structure with multiple intermediate facesheets is suggested based on simulation results, and substantially improved shielding capability is achieved. (C) 2015 Elsevier Ltd. All rights reserved.