Thermobaric Effects of Cast Composite Explosives of Different Charge Masses and Dimensions

Abstract

Abstract:The aim of this research was to determine the thermobaric effect of cast composite explosives, with different masses and dimensions of the chosen explosive charges. This was done by measuring the shock wave parameters in air (maximum overpressure and pressure impulse) and quantifying the thermal effect (temperature-time dependence), at different distances from the centre of the detonation. The chosen thermobaric explosive composition, TBE-3, was characterized. Its density, detonation velocity and viscosity-time dependence were determined. Experimental samples of different masses and calibres were prepared. The shock wave parameters in air were determined in field tests, by measuring the overpressure by piezo-electric pressure transducers. The detonation and the expansion of the explosion products were filmed by a TV high-speed camera, Phantom V9. An infrared (IR) camera FLIR SC7200 was used for recording the IR scene of the explosions and for tracking the thermal effects by a thermographic technique, i.e. thermal imaging. This work is an initial step towards establishing a method for the quantification of the thermal effects of a thermobaric detonation.

Nanotechnology for military applications: A survey of recent research in Military technical institute

“…That is in accordance with expectation and previous results for similar samples, i.e. for similar compositions containing aluminum or aluminum and magnesium, where maximum recorded temperatures were above 3300ºС, which was confirmed using optical pyrometer [40][41][42]. Actually, added nanoparticles of aluminum do not affect maximum temperatures, they are affected by the composition; but do affect the duration of post-detonation combustion.…”

“…Significant increase of detonation energy can be achieved because of high amount of heat that is released through reaction of metal and products of detonation. Secondary, post-detonation combustion of metal fuel with detonation products can be used as a source of destructive energy in limited, enclosed space (it creates longer duration of overpressure and extra thermal damage) and this effect is pronounced at thermobaric explosive compositions [40][41][42][43]. Thermobaric explosives contain crystal high explosive, polymer binder, fuel component and oxidant.…”

Aluminized Energetic Coordination Polymers Constructed from Transition Metal Centers (Co, Ni, and Cu)

“…Compared with conventional explosives, aluminized explosives have stronger damage effect on soft targets due to their thermal effect and long pressure duration during explosion and combustion, especially in enclosed environments such as tunnels, bunkers, underground structures, buildings, and field fortifications [1][2][3][4]. The excellent performance of aluminized explosives is mainly due to the afterburning effect caused by the reaction of aluminum (Al) with the detonation product or ambient air after their primary detonation.…”

“…The post combustion of Al can also lengthen the overpressure duration [5][6]. Three events are usually involved in the detonation of aluminized explosives: the initial anaerobic detonation reaction (base explosive's detonation), the post-detonation anaerobic combustion reaction (Al reacts with oxygen from detonation products), and the post-detonation aerobic combustion reaction (Al reacts with air) [2]. Therefore, for aluminized explosives, the efficient participation of aluminum in the post-combustion reaction has a significant impact on the blast effect.…”

Experimental Performance Assessment of Layered Thermobaric Explosive in an Explosion Chamber

“…Simić et al. [20, 21] analyzed the effect of different binders and oxidants on the shock parameters of cast TBX through experiments. They also studied the blast and fireball temperature effects arised from different size and quality of cast charge, which shows these effect are the most pronounced in the region near the detonation site.…”