Defence Technology

Defence Technology

Volume 17, Issue 5, October 2021, Pages 1687-1698
Defence Technology

Shock-induced reaction behaviors of functionally graded reactive material

https://doi.org/10.1016/j.dt.2020.09.010Get rights and content
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Abstract

In this paper, the ballistic impact experiments, including impact test chamber and impact double-spaced plates, were conducted to study the reaction behaviors of a novel functionally graded reactive material (FGRM), which was composed of polytetrafluoroethylene/aluminum (PTFE/Al) and PTFE/Al/bismuth trioxide (Bi2O3). The experiments showed that the impact direction of the FGRM had a significant effect on the reaction. With the same impact velocity, when the first impact material was PTFE/Al/Bi2O3, compared with first impact material PTFE/Al, the FGRM induced higher overpressure in the test chamber and larger damaged area of double-spaced plates. The theoretical model, which considered the shock wave generation and propagation, the effect of the shock wave on reaction efficiency, and penetration behaviors, was developed to analyze the reaction behaviors of the FGRM. The model predicted first impact material of the FGRM with a higher shock impedance was conducive to the reaction of reactive materials. The conclusion of this study provides significant information about the design and application of reactive materials.

Keywords

Functionally graded reactive material
PTFE/Al
Reaction behavior
Ballistic impact experiments
Reaction efficiency

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Peer review under responsibility of China Ordnance Society