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活性弹丸超高速撞击蜂窝夹芯板双层结构的损伤特性OA北大核心CSTPCD

A study of damage characteristics caused by hypervelocity impact of reactive projectile on the honeycomb sandwich panel double-layer structure

中文摘要英文摘要

为了研究蜂窝夹芯板双层结构在活性弹超高速撞击下的损伤特性,制备了PTFE(polytetrafluoroethylene)/Al/Cu柱形活性弹丸,利用二级轻气炮对蜂窝夹芯板双层结构靶开展超高速撞击实验,采用超高速摄像机记录了活性弹撞击蜂窝板的碎片云演化过程,分析了蜂窝板的穿孔特性和结构内部各组件的损伤特征;数值模拟了撞击过程,分析了活性弹丸的超高速侵爆效应,获得了碎片云的膨胀运动规律,揭示了活性弹丸冲击-爆轰耦合效应对靶板的损伤机理.结果表明:活性弹丸在蜂窝板上形成较小的入射孔和较大的出射孔,出射孔直径随着撞击速度的提高而增大;蜂窝夹芯板入射孔、出射孔和蜂窝芯穿孔直径随着活性弹体质量的增加而增大,入射孔直径不受蜂窝板厚度和蜂窝芯胞格直径的影响,出射孔和蜂窝芯穿孔直径随着蜂窝板厚度的增大先增大后减小,随着蜂窝芯胞格直径的增大而增大;活性弹产生具有较高膨胀速度的高温碎片云,其膨胀速度随着撞击速度的提高而提高.活性弹的冲击-爆轰耦合效应增大了结构内部组件的毁伤面积.在2~6 km/s速度范围内,活性弹在蜂窝板上形成的出射孔直径约为铝合金弹的1.3~1.8倍,碎片云的膨胀速度是铝合金弹的1.8~3.2倍.相较于铝合金弹丸,活性弹丸增大了蜂窝夹芯板双层结构内部和后板的毁伤面积,提高了毁伤效能.

With the prepared reactive projectiles,and the two-stage light gas gun was used to conduct hypervelocity impact experiments on the honeycomb double-layer structure target. A high-speed camera was used to record the impact process,so the evolution process of debris clouds during the impact of the reactive projectile on honeycomb panels was obtained. By recycling the targets,the perforation characteristics of the honeycomb plate were analyzed,and the damage characteristics of various components inside the structure were found. Numerical simulations of impact process are carried out,and the hypervelocity penetration effect of reactive projectiles is analyzed according to the experimental and numerical simulation results. The expansion motion law of debris clouds is obtained,revealing the damage mechanism of the coupling effect of impact-detonation of reactive projectiles on the target. The results indicate that the impact initiation characteristic of reactive projectile can form smaller inlet and larger outlet holes on honeycomb panel,and the diameter of the outlet perforation increases with the increase of impact velocity. Under the impact of reactive projectile,the perforation diameters of honeycomb sandwich panel for the entry perforation,exit perforation and honeycomb core perforation all increase with the increase of reactive projectile mass. The perforation diameters are not affected by the thickness of honeycomb sandwich panel. The perforation diameter and honeycomb core perforation diameter first increase and then decrease with the increase of honeycomb panel thickness. The entry perforation does not change with the increase of honeycomb core cell diameter. The exit perforation diameter and honeycomb core perforation increase with the increase of honeycomb core cell diameter. Reactive projectile can generate high-temperature debris cloud with higher expansion velocity,and the expansion velocity increases with the increase of impact velocity. The coupling effect of impact-detonation of reactive projectile leads to increase of the damage area on the internal components of the target. In the velocity range of 2–6 km/s,the diameter of the perforation hole formed by the reactive projectile on the honeycomb sandwich panel is about 1.3–1.8 times that of the aluminum alloy projectile,and the expansion velocity of the debris cloud is 1.8–3.2 times that of the aluminum alloy projectile. Compared with the aluminum alloy projectile,the reactive projectile increases the damage area of the debris cloud on the inner and rear plates of the honeycomb sandwich panel double-layer structure,and improves the damage efficiency.

任思远;武强;张品亮;宋光明;陈川;龚自正;李正宇

北京卫星环境工程研究所,北京100094北京卫星环境工程研究所,北京100094||可靠性与环境工程技术国防科技重点实验室,北京100094

力学

活性弹丸超高速撞击碎片云损伤特征冲击-爆轰耦合效应

reactive projectilehypervelocity impactdebris clouddamage characteristicscoupling effect of impactdetonation

《爆炸与冲击》 2024 (007)

81-94 / 14

国家自然科学基金(12202068);国防科工局空间碎片专项(KJSP2023020201,KJSP2020010402)

10.11883/bzycj-2023-0272

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