Al/PTFE反应材料冲击能量释放行为的冲击反应模型

IF 3.9 Q2 CHEMISTRY, MULTIDISCIPLINARY
Bao-yue Guo , Ke-rong Ren , Xia-yin Ma , Gan Li , Cai-min Huang , Zhi-bin Li , Rong Chen
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引用次数: 0

摘要

金属/聚合物反应材料在常温常压条件下是惰性的,并具有一定的结构强度,使其能够被制造成碎片等组件。然而,在强烈的冲击下,它们会发生激烈的反应,释放出大量的化学能。Al/PTFE是最典型的金属/聚合物反应材料之一。当使用反应性材料制造战斗部破片时,除了动能破坏外,还能向目标输送大量的化学能。反应材料作为PELE (Penetrator with Enhanced Lateral Efficiency)弹丸的核心材料,在穿透目标后可以增强弹壳的破片,造成物理和化学损伤。这些材料的反应机理复杂,难以对化学反应过程进行直接监测。反应物质的激波能量释放过程不同于传统烈性炸药的激波爆轰过程。因此,现有的描述炸药激波爆轰过程的反应模型不适用于描述反应性物质。因此,在宏观尺度上理解和描述反应材料的冲击反应特性对于促进其工程应用至关重要。基于典型Al/PTFE反应材料(Al/PTFE质量比为26.5:73.5)的板冲击实验和热分析,提出了一种现象学冲击反应模型。冲击反应模型可以描述材料在冲击压缩过程中的化学反应行为。阐述了冲击反应模型的数学表达式、编程实现原理和模型参数的获取方法。同时,将冲击反应模型作为二次开发嵌入到LS-DYNA非线性动态仿真软件的素材库中。对Al/PTFE反应材料在几种典型应用中的行为进行了数值模拟。结果表明,冲击反应模型能较好地描述Al/PTFE反应材料在冲击压缩下的力学-热-化学耦合行为。这对于加快反应材料在武器损伤等军事领域的工程应用具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Shock reaction model for impact energy release behavior of Al/PTFE reactive material

Shock reaction model for impact energy release behavior of Al/PTFE reactive material
Metal/polymer reactive materials are inert under normal temperature and pressure conditions and possess a certain level of structural strength, allowing them to be fabricated into components such as fragments. However, under strong impact, they can undergo intense reactions and release a large amount of chemical energy. Al/PTFE is one of the most typical metal/polymer reactive materials. When reactive materials are used to make warhead fragments, they can deliver a significant amount of chemical energy to the target in addition to the kinetic energy damage. When used as the core of a PELE (Penetrator with Enhanced Lateral Efficiency) projectile, reactive materials can enhance the fragmentation of the projectile shell after penetrating the target, causing both physical and chemical damage. The reaction mechanism of these materials is complex, and it is difficult to directly monitor the chemical reaction process. The shock energy release process of reactive materials is different from the shock detonation process of traditional high explosives. Therefore, the existing reaction models describing the shock detonation process of explosives are not applicable to describe reactive substances. Consequently, understanding and describing the shock reaction characteristics of reactive materials on a macroscopic scale is crucial for promoting their engineering applications. Based on the plate impact experiments and thermal analysis of typical Al/PTFE reactive materials (with a mass ratio of Al to PTFE of 26.5:73.5), this paper proposes a phenomenological shock reaction model. The shock reaction model can describe the chemical reaction behavior of materials during shock compression. The mathematical expressions, programming implementation principles, and methods for obtaining model parameters of the shock reaction model are elaborated. At the same time, the shock reaction model is embedded into the material library of the LS-DYNA nonlinear dynamic simulation software as a secondary development. Numerical simulations of the behavior of Al/PTFE reactive materials in several typical applications are carried out. The results show that the shock reaction model can well describe the mechanical-thermal-chemical coupling behavior of Al/PTFE reactive materials under shock compression. This is of great significance for accelerating the engineering application of reactive materials in military fields such as weapon damage.
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来源期刊
Energetic Materials Frontiers
Energetic Materials Frontiers Materials Science-Materials Science (miscellaneous)
CiteScore
6.90
自引率
0.00%
发文量
42
审稿时长
12 weeks
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