Testing apparatus for attenuation law of stress wave of quasi-brittle materials under explosion and quantitative characterization method

A technology of stress wave attenuation and brittle materials, which is applied in the direction of measuring devices, analyzing materials, and using sound waves/ultrasonic waves/infrasonic waves for material analysis, etc. It can solve the problems that the damage zone test cannot be implemented well, and achieve the reduction of dispersion and application Flexible, easy-to-operate effects

Active Publication Date: 2016-11-09
HOHAI UNIV
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Problems solved by technology

However, in the case of ensuring that the instrument is not damaged, usually only the velocity in the vibration zone can be measured
Therefore, the test for the damage zone cannot be well implemented

Method used

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  • Testing apparatus for attenuation law of stress wave of quasi-brittle materials under explosion and quantitative characterization method
  • Testing apparatus for attenuation law of stress wave of quasi-brittle materials under explosion and quantitative characterization method
  • Testing apparatus for attenuation law of stress wave of quasi-brittle materials under explosion and quantitative characterization method

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Such as Figure 1 to Figure 4 As shown, the test device for the stress wave attenuation law of quasi-brittle materials under explosion is a device for measuring stress wave attenuation based on Hopkinson's principle. It uses the Hopkinson rod technology for testing, including incident rod 1, bullet 4, Air source 5, speedometer 6, shaping sheet 12, energy-absorbing rod 3, specimen rod 2, strain gauge 7, data acquisition instrument 10, oscilloscope 11, etc., wherein, energy-absorbing rod 3 and specimen rod 2 are all concrete materials . What the incident rod 1 adopted was made of aluminum, and the material of the bullet 4 and the incident rod 1 was the same. The diameters of bullet 4, incident rod 1, specimen rod 2 and absorbing rod 3 are all 37 mm, bullet 4 is 80 mm long, incident rod 1 is 1000 mm long, and specimen rod 2 and energy-absorbing rod 3 are 1000 mm ...

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Abstract

The invention discloses a testing apparatus for attenuation law of stress wave of quasi-brittle materials under explosion and a quantitative characterization method. The apparatus comprises an incident bar (1), a test-piece bar (2) and an energy-absorption bar (3) which are successively connected end to end and horizontally disposed; and the inlet of the incident bar (1) directly faces to a bullet (4) which is connected with a gas source (5), a velocity meter (6) is arranged between the gas source (5) and the incident bar (1), the incident bar (1) and the test-piece bar (2) are both provided with strain gauges (7) which are connected with a data acquisition instrument (10), and the data acquisition instrument (10) is connected with a oscilloscope (11). According to the testing apparatus for attenuation law of stress wave of quasi-brittle materials under explosion and the quantitative characterization method, strain is employed for describing the attenuation law of stress wave, and attenuation of stress wave can be completely shown through the test, operation is simple, application is flexible and the application field is relatively wide.

Description

technical field [0001] The present invention relates to a test device and measurement method for the stress wave attenuation law of quasi-brittle materials under explosion, in particular to a test device and measurement method for the stress wave attenuation law of quasi-brittle materials under explosion based on the Hopkinson principle. It belongs to the technical field of stress wave attenuation law testing. Background technique [0002] A stress wave will be generated at the source of the explosion, and the stress wave will pass through the damage zone, damage zone, transition zone and vibration zone in sequence when propagating in the concrete. At present, in the field of blasting engineering, a theory of controlled blasting is usually adopted, which is for the quasi-brittleness of rock (underground structure, rock mass, etc.) / concrete (concrete structure) outside the expected distance during the blasting process. material damage. The test method usually used to improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
CPCG01N29/045
Inventor 邵羽陈徐东聂宇陈逸杰
Owner HOHAI UNIV
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