Study of the Impact Energy Releasing Characteristics of AlPTFEW Energetic Jets

Abstract EN

Compared with traditional jets, energetic jets have more efficient damage effects.

To study the reaction characteristics of polytetrafluoroethylene- (PTFE-) based energetic jets under impact loading, the static mechanical properties of Al/PTFE/W composite energetic materials are studied by using a universal testing machine at a strain rate of 0.01 s−1, and the dynamic mechanical properties are tested on a slip Hopkinson pressure bar (SHPB) system at a strain rate of 1000∼5500 s−1.

A dynamic energy acquisition system is established to quantify the energy generated by the response of the Al/PTFE/W energetic jets to impact targets.

The effects of the material proportion and impact energy on the mechanical and energy release properties of the Al/PTFE/W energetic jets are analyzed.

The results show that the Al/PTFE/W composite has an obvious strain rate effect.

As the W content in the composite increases, the yield strength and compressive strength of the material increase gradually, but the strain at break decreases.

When the W content is 45%, the peak pressure, total release energy, pressure platform duration, and total pressure duration of the Al/PTFE/W energetic jets are the highest.

As the impact energy increases, the pressure peak and energy release values of the energetic jets increase.

At an impact energy threshold of 106.1 MJ/m2, the chemical reaction of the Al/PTFE/W (45%) energetic jets is saturated.

The results provide a theoretical and experimental basis for the application of energetic jets.