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

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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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All data generated or analyzed during this study are available from the corresponding author on reasonable request.

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Acknowledgements

The work described in this paper was supported by the National Natural Science Foundation of China (Grant No. 11902087), the Start-up Funds for High-level Personnel Research of Guizhou Institute of Technology (No. XJGC20190957), the Engineering Research Centers of Guizhou Ordinary Institution of Higher Education under Grant ([2018]007), and the Creative Research Groups Program of Guizhou Educational Commission under Grant ([2018]026).

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Authors and Affiliations

  1. School of Aerospace Engineering, Guizhou Institute of Technology, Guizhou Guiyang, 550003, China

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

  2. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, 100081, China

    H. F. Wang

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  1. F. Y. Xu
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  2. H. F. Wang
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Correspondence to F. Y. Xu.

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Communicated by P. Hazell.

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Xu, F.Y., Wang, H.F., Kang, J. et al. Response behavior of the PTFE/Al/W granular composite under different loadings. Shock Waves 32, 633–642 (2022). https://doi.org/10.1007/s00193-022-01101-6

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