聚脲涂层充液容器中爆炸和碎片共同诱发的协同损伤的特征

IF 5.1 2区 工程技术 Q1 Engineering Defence Technology Pub Date : 2024-08-21 DOI:10.1016/j.dt.2024.08.009
Chen Tao, Chong Ji, Xin Wang, Juan Gu, Yuting Wang, Changxiao Zhao
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引用次数: 0

摘要

充液容器 (LFC) 广泛用于储存和运输石油、化学试剂和其他资源。作为军事打击和恐怖爆炸的重要目标,充液容器很容易受到爆炸波和碎片的伤害。为了探索聚脲弹性体对充液容器的保护作用,实验研究了聚脲涂层充液容器(PLFC)在爆炸冲击波和碎片共同作用下的损伤特征。通过扫描电子显微镜观察了聚脲层的微观结构,分析了聚脲层的断裂和自修复现象。采用模拟方法详细解释了冲击波和碎片对聚脲层的综合影响。最后,综合比较了冲击波和碎片单独及组合对 PLFC 损伤的影响。结果表明,聚脲降低了碎片对 LFC 的穿孔率,自愈现象也降低了容器内的液体流失率。聚脲降低了 LFC 中心的凹陷程度,导致相邻碎片穿透 LFC 的距离减小,孔与孔之间的吸附和断裂概率增加。在近距离爆炸下,爆炸冲击波先于碎片到达 LFC。聚脲并非对 LFC 的保护都有增强作用。内部水的存在增强了容器的抗爆性能,碎片撞击水形成的水动力冲撞(HRAM)加剧了容器的塑性变形。这两种作用对 LFC 的变形有增强作用。集装箱的凹陷深度比单独的爆炸冲击波高出 27%,因此不能简单地将其概括为线性叠加。
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Characterization of combined blast- and fragments-induced synergetic damage in polyurea coated liquid-filled container
Liquid-filled containers (LFC) are widely used to store and transport petroleum, chemical reagents, and other resources. As an important target of military strikes and terrorist bombings, LFC are vulnerable to blast waves and fragments. To explore the protective effect of polyurea elastomer on LFC, the damage characteristics of polyurea coated liquid-filled container (PLFC) under the combined loading of blast shock wave and fragments were studied experimentally. The microstructure of the polyurea layer was observed by scanning electron microscopy, and the fracture and self-healing phenomena were analyzed. The simulation approach was used to explain the combined blast- and fragments-induced on the PLFC in detail. Finally, the effects of shock wave and fragment alone and in combination on the damage of PLFC were comprehensively compared. Results showed that the polyurea reduces the perforation rate of the fragment to the LFC, and the self-healing phenomenon could also reduce the liquid loss rate inside the container. The polyurea reduces the degree of depression in the center of the LFC, resulting in a decrease in the distance between adjacent fragments penetrating the LFC, and an increase in the probability of transfixion and fracture between holes. Under the close-in blast, the detonation shock wave reached the LFC before the fragment. Polyurea does not all have an enhanced effect on the protection of LFC. The presence of internal water enhances the anti-blast performance of the container, and the hydrodynamic ram (HRAM) formed by the fragment impacting the water aggravated the plastic deformation of the container. The combined action has an enhancement effect on the deformation of the LFC. The depth of the container depression was 27% higher than that of the blast shock wave alone; thus, it cannot be simply summarized as linear superposition.
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来源期刊
Defence Technology
Defence Technology Engineering-Computational Mechanics
CiteScore
7.50
自引率
7.80%
发文量
1248
审稿时长
22 weeks
期刊介绍: Defence Technology, sponsored by China Ordnance Society, is published quarterly and aims to become one of the well-known comprehensive journals in the world, which reports on the breakthroughs in defence technology by building up an international academic exchange platform for the defence technology related research. It publishes original research papers having direct bearing on defence, with a balanced coverage on analytical, experimental, numerical simulation and applied investigations. It covers various disciplines of science, technology and engineering.
期刊最新文献
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