Response behavior of the PTFE/Al/W granular composite under different loadings

IF 1.7 4区工程技术 Q3 MECHANICS

Shock Waves Pub Date : 2022-10-11 DOI:10.1007/s00193-022-01101-6

F. Y. Xu, H. F. Wang, J. Kang, Q. Y. Wang, X. Yang

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引用次数: 1

Abstract

PTFE/Al/W granular composite is a kind of impact-initiated energetic material and may well enhance damage to the impacted targets. To gain insight into response behavior of PTFE/Al/W granular composite under different loadings, the combined approach of experiments and theoretical analyses is used in this paper. More specifically, the combinations of quasi-static compression, dynamic tests, and ballistic impact experiments are conducted. Cylindrical PTFE/Al/W granular composite specimens, with a density of 7.7 \(\hbox {g/cm}^{3}\) and a diameter of 10 mm, are fabricated by cold press molding, sintering, and cooling. Moreover, a high-speed imaging technique is used to record response process of the specimens in ballistic impact experiments. The experimental and analytical results show that the response behavior of PTFE/Al/W granular composite is significantly influenced by the loading strain rate. When the strain rate is less than \(3.6\times 10^{3}\,\hbox {s}^{-1}\), only mechanical response is observed in the quasi-static compression and dynamic tests. However, when the strain rate is higher than \(4\times 10^{4}\,\hbox {s}^{-1}\), the chemical reaction is found in the ballistic impact experiments. Furthermore, chemical response shows an enhanced trend with increasing of the loading strain rate.

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PTFE/Al/W颗粒复合材料在不同载荷下的响应行为

PTFE/Al/W颗粒复合材料是一种冲击激发的含能材料，可以很好地增强对冲击目标的损伤。为深入研究PTFE/Al/W颗粒复合材料在不同载荷作用下的响应行为，本文采用实验与理论分析相结合的方法。更具体地说，进行了准静态压缩、动态试验和弹道冲击试验的组合。通过冷压成型、烧结和冷却制备了密度为7.7 \(\hbox {g/cm}^{3}\)、直径为10 mm的圆柱形PTFE/Al/W颗粒复合材料试样。此外，采用高速成像技术记录了弹道冲击实验中试样的响应过程。实验和分析结果表明，加载应变率对PTFE/Al/W颗粒复合材料的响应行为有显著影响。当应变速率小于\(3.6\times 10^{3}\,\hbox {s}^{-1}\)时，准静态压缩和动态试验只观察到力学响应。然而，当应变速率大于\(4\times 10^{4}\,\hbox {s}^{-1}\)时，在弹道冲击实验中发现了化学反应。随着加载应变速率的增加，化学响应有增强的趋势。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Shock Waves 物理-力学

CiteScore

4.10

自引率

9.10%

发文量

审稿时长

17.4 months

期刊介绍： Shock Waves provides a forum for presenting and discussing new results in all fields where shock and detonation phenomena play a role. The journal addresses physicists, engineers and applied mathematicians working on theoretical, experimental or numerical issues, including diagnostics and flow visualization. The research fields considered include, but are not limited to, aero- and gas dynamics, acoustics, physical chemistry, condensed matter and plasmas, with applications encompassing materials sciences, space sciences, geosciences, life sciences and medicine. Of particular interest are contributions which provide insights into fundamental aspects of the techniques that are relevant to more than one specific research community. The journal publishes scholarly research papers, invited review articles and short notes, as well as comments on papers already published in this journal. Occasionally concise meeting reports of interest to the Shock Waves community are published.