Expansibility characterization method of gel-state solid-liquid high-energy fuel filling explosive body

Abstract

The invention discloses an expansibility characterization method of a gel-state solid-liquid high-energy fuel filling explosive body. According to the method, isopropyl nitrate in a sample is replacedwith fuel hydrocarbon to be prepared into a simulated explosive; and the simulated explosive is wrapped by a nitrile rubber film bag, air exhausting is carried out in silicone oil, a bag opening is fastened through a rope and sealed, and the simulated explosive is prepared into a filling simulated explosive. The volumes of the silicone oil in a volume expansion coefficient tester at the temperature of 30 DEG C and the temperature of 60 DEG C are detected; the filling simulated explosive is placed into the silicone oil of the tester, and the volumes of the filling simulated explosive at the temperature of 30 DEG C and the temperature of 60 DEG C are obtained through volume changes of the silicone oil; and the volume expansion coefficient of the filling simulated explosive in the temperature zone from 30 DEG C to 60 DEG C is calculated. According to the method, volume expansibility of the heated gel-state solid-liquid high-energy fuel filling explosive under the full constraint condition can be subjected to characterization, the detection environment is closer to the actual charge condition, and basic data can be provided for determining the explosive filling process. The expansibility characterization method has the beneficial effects that the safety of the detection process is improved; and the structure of the simulated explosive is stable, and the detection accuracy is improved.

Description

technical field [0001] This application belongs to the field of physical and chemical performance testing and research of explosives, and mainly relates to the characterization method of volume expansion of materials, especially the characterization method of volume expansion of gel-state solid-liquid high-energy fuel charges. Background technique [0002] Fuel air explosive is an inhomogeneous explosive mixture composed of volatile liquid hydrocarbons (hydrocarbons) or solid powder combustibles as fuel and oxygen in the air as oxidant. Different from ordinary explosives, the oxidant in fuel air explosives uses all or most of the oxygen in the air, and it does not need to be carried by the projectile, but can be obtained at the explosion site. Fuel-air explosive weapons have great damage power to living forces and soft targets. Its appearance is a major innovation and development of conventional weapons, adding a new series to conventional weapons. Since fuel-air explosives...

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Problems solved by technology

[0014] Compared with solid propellants and explosives, the mechanical strength of gel-state solid-liquid high-energy fuel is poor, and it cannot be made into a stable shape of "the upper and lower ends should be parallel, smooth, and crack-free" when the mass does not exceed 0.13g, so it cannot be used. GJB770B-2005 method 408.1 detects the linear expansion coefficient, and the volume expansion coefficient cannot be calculated

[0015] If according to the liquid volume expansion coefficient detection method (the sample is placed in a cylindrical glass, the upper surface rises after heating, and the volume change is obtained, the volume expansion coefficient can be calculated according to the formula, which is a kind of weak constraint for the sample. detection), because the gel-state solid-liquid high-energy fuel contains a large number of bubbles, the volume expansion of the gas after heating under this weak constraint is significantly higher than that under the strong constraint state, and the corresponding detection results are too high, which cannot represent the strong constraint of the actual charge. body expansibility

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