Chemical explosive loading low-temperature impact initiation experimental device and method

A low-temperature shock and experimental device technology, which is applied in the field of low-temperature shock initiation experiments loaded with chemical explosions and low-temperature shock initiation experimental devices loaded with chemical explosions, can solve the problems of sample temperature overshoot, prone to temperature gradients, and low temperature control accuracy, and achieve The effect of uniform temperature inside and outside

Inactive Publication Date: 2016-06-01
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] 1. The chemical explosion impact loading system is affected by the low temperature environment
When the above device cools the tested sample, it inevitably cools the chemical explosion shock loading system, resulting in inconsistent initial shock loading conditions at different temperatures
[0005] 2. The temperature control accuracy is low
The low temperature control system indirectly controls the temperature of the tested sample by controlling the temperature in the low temperature test chamber. This indirect control is prone to temperature feedback lag, low temp

Method used

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  • Chemical explosive loading low-temperature impact initiation experimental device and method

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Experimental program
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Effect test

Embodiment 1

[0038] This experiment needs to determine the impact initiation performance of B explosive under 3-4GPa pressure loading.

[0039]According to the purpose of the experiment, TNT explosive with a lower explosion pressure (about 20 GPa) was first selected as the booster. Then determine the material and thickness of the heat insulation layer and the attenuation layer. The heat insulation layer is a 10mm thick polytetrafluoroethylene layer, and the attenuation layer is a 18mm thick metal aluminum layer. After the shock wave is attenuated by the heat insulation layer and the attenuation layer, the pressure acting on the tested sample is 3-4GPa.

[0040] according to figure 2 The shown structure assembled the experimental setup.

[0041] In the low temperature control system, set the target temperature to -15°C, and the cooling rate to 3°C / min, and then start the cooling device to cool down the B explosive sample. The cooling device can be a Freon condenser. The cooling device d...

Embodiment 2

[0043] This experiment needs to measure the shock initiation performance of TATB explosive under 15-16GPa pressure loading.

[0044] According to the purpose of the experiment, PBX9404 explosive with a higher explosion pressure (about 36GPa) was first selected as the booster. Then determine the material and thickness of the heat insulation layer and the attenuation layer. The heat insulation layer is a 10mm thick polytetrafluoroethylene layer, and the attenuation layer is a 22mm thick metal aluminum layer. After the shock wave is attenuated by the heat insulation layer and the attenuation layer, the pressure acting on the tested sample is 15-16GPa.

[0045] according to figure 2 The shown structure assembled the experimental setup.

[0046] In the low temperature control system, set the target temperature to 0°C, and the cooling rate to 2°C / min, and then start the cooling device to cool down the TATB explosive sample. The cooling device can be an air-cooled condenser. The ...

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Abstract

The invention discloses an explosive loading low-temperature impact initiation experimental device and method. The device comprises a chemical explosive impact loading system, a partition, a to-be-tested sample, a base and a low-temperature control system, wherein the low-temperature control system comprises a cooling device, a temperature sensor and a low-temperature controller; the partition comprises an upper thermal insulating layer and a lower attenuation layer. The method comprises the following steps: determining a booster explosive, selecting the thermal insulating layer and the attenuation layer according to the attenuation law of impact waves in materials, determining the thicknesses of both layers, properly assembling the experimental device, setting target temperature and cooling rate, priming a detonator when the temperature reaches the target temperature and becomes stable, and recording various performance parameters of the sample during the explosion process. The chemical explosive loading low-temperature impact initiation experimental device provided by the invention can directly cool the to-be-tested sample, and is high in speed and efficiency and uniform in cooling; moreover, the sensor is placed inside the to-be-tested sample, so that timely temperature feedback is achieved and the precision is high; besides, the partition is formed by the thermal insulating layer and the attenuation layer, so that the impact loading control cannot be affected by low temperature.

Description

technical field [0001] The embodiments of the present invention relate to the fields of energetic material detonation performance testing technology, low temperature test technology, etc., more specifically, the embodiments of the present invention relate to a chemical detonation loaded low temperature impact detonation experimental device and using the device to carry out chemical detonation loaded low temperature The method of shock initiation experiment. Background technique [0002] Shock initiation experiment is an important means to study the detonation performance of energetic materials. The detonation performance of energetic materials is not only related to its own properties, but also closely related to the ambient temperature. Therefore, the research on energetic materials often requires shock initiation experiments at a specific temperature. [0003] At present, the most commonly used method for impact initiation experiments on energetic materials below room tem...

Claims

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Application Information

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IPC IPC(8): G01N25/54
CPCG01N25/54
Inventor 谭凯元文尚刚韩勇卢校军贾路川叶辉刘清杰
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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