A device for measuring strain rate during explosive impact

A measuring device and strain rate technology, applied in the field of explosive performance parameter experiments, can solve the problems of measuring strain rate, poor visibility of impact process, and no test method for kilogram explosive samples, and achieve the effect of strong acceleration ability

Active Publication Date: 2021-12-21
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) The conventional method of accelerating explosives is difficult to guarantee the potential safety hazard caused by the friction between the explosives and the barrel of the accelerating device during the acceleration of explosives;
[0004] (2) There is no appropriate test method for measuring the strain rate during the impact of the kilogram explosive sample;
[0005] (3) The visibility of the impact process is poor, especially it is difficult to take into account the visualization of the test process and the accurate measurement of the strain rate

Method used

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  • A device for measuring strain rate during explosive impact
  • A device for measuring strain rate during explosive impact
  • A device for measuring strain rate during explosive impact

Examples

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Effect test

Embodiment 1

[0029] In this embodiment, a strain rate measuring device for the impact process of explosives is designed to measure the impact strain rate of 9 g of explosives at a speed of 150 m / s.

[0030] Choose Light Gas Cannon to give Dynamite 4 speed.

[0031] A device for measuring strain rate during explosive impact, said device comprising guide rail 1, slider 2, housing 3, explosive 4, turning tool 5, speed measuring target 6, target plate 7 and high-speed photography 8, said explosive impact process The components of the strain rate measuring device are installed sequentially along the same axis. The guide rail 1 is a conductive metal, and the cross section of the guide rail 1 is a circular ring with a notch. , the track A1-1 and the track B1-2 are overall long rods with equal cross-sections, the cross-sections of the track A1-1 and the track B1-2 are fan-shaped at an angle of 180°, and the track A1-1 and the track B1- 2 Symmetrical installation, the middle of the track A1-1 and ...

Embodiment 2

[0040] In this embodiment, a device for measuring strain rate during explosive impact is designed to measure the impact strain rate of 1000 g of explosive at a speed of 100 m / s.

[0041] Accelerate Dynamite 4 with the Electromagnetic Railgun.

[0042] A device and method for measuring strain rate during explosive impact, said device comprising guide rail 1, slider 2, housing 3, explosive 4, turning tool 5, speed measuring target 6, target plate 7 and high-speed photography 8, said explosive The components of the strain rate measurement device during the impact process are installed sequentially along the same axis. The guide rail 1 is a conductive metal, and the cross section of the guide rail 1 is a circular ring with a gap. The guide rail 1 is composed of a positive pole track 1-1 and a negative pole track 1-2, the positive pole track 1-1 and the negative pole track 1-2 are long rods with equal cross-section as a whole, and the cross-sections of the positive pole track 1-1 a...

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Abstract

The application discloses a strain rate measuring device during the impact of explosives. The basic principle is to accelerate the explosives by using a light gas gun or electromagnetic loading, measure the flying speed of the explosives by using a speed measuring target, and calculate the strain rate of the explosives according to the deformation generated during the impact of the explosives on the rigid transparent glass. The change trend of strain rate with the impact process, this application has the advantages of strong versatility, low cost, and convenient replacement of wearing parts, can meet the impact test of kilogram-level explosive samples, and can provide technical support for the development of new explosives and the application of explosives.

Description

technical field [0001] The application belongs to the technical field of explosive performance parameter experiments, and relates to a strain rate measuring device during explosive impact, which is mainly used for the research of explosive non-shock ignition performance parameters, and can provide technical support for explosive formula design and explosive safety prediction. Background technique [0002] Explosives may encounter impact stimuli of different intensities during their manufacture, transportation, storage, and destruction. If the impact is strong enough, explosives may ignite or even explode, which is one of the main safety hazards of explosives. In order to ensure The impact safety of explosives, researchers have made a lot of efforts, such as Qu Kepeng and others used the big drop hammer to study the impact safety of RDX-based PBX explosives under different stress rates, and Dai Xiaogan used the Stephen test to study the impact safety at room temperature and I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/00
CPCG01N19/00
Inventor 李鸿宾杨建高赞姜夕博任松涛金朋刚
Owner XIAN MODERN CHEM RES INST
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