Experimental device for automatically loading impacts on SHPB (Split Hopkinson Pressure Bar) at high temperature

A technology of loading experiment and experimental device, which is applied in the direction of using one-time impact force to test the strength of materials and the preparation of test samples, etc. It can solve the problems of uneven heating of test pieces, inaccurate experimental process, and low heating efficiency, so as to ensure stability Safety and safety, accurate experimental process, and high heating efficiency

Active Publication Date: 2014-03-26
PLA UNIV OF SCI & TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to prevent the rapid cooling of the test piece away from the heat source, the assembly device sets the heating furnace directly below the assembly position of the test piece, resulting in uneven heating of the test piece, and is not suitable for heating large-sized test pieces, and the heating efficiency is low; in addition, Since the flight time of the projectile

Method used

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  • Experimental device for automatically loading impacts on SHPB (Split Hopkinson Pressure Bar) at high temperature
  • Experimental device for automatically loading impacts on SHPB (Split Hopkinson Pressure Bar) at high temperature
  • Experimental device for automatically loading impacts on SHPB (Split Hopkinson Pressure Bar) at high temperature

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Embodiment Construction

[0022] Such as figure 1 As shown, the SHPB automatic rod impact loading experimental device under high temperature conditions of the present invention includes a high-pressure gas tank 1, an incident rod 7, a transmission rod 15, a base 14 and a test piece for placing the incident rod 7, the transmission rod 15 and the test piece Heating device 10, said test piece heating device 10 is separated from base 14, and between heating device 10 and base 14, there is a test piece guide rail 12 with adjustable width for guiding the test piece from heating device to base 14, on base 14 The other side of the test piece opposite to the test piece guide rail 12 is provided with a test piece stop rod 20 to limit the position of the test piece, and the base 14 is three-dimensionally adjustable.

[0023] The test piece heating device is set separately from the base, so that the test piece can be heated evenly, and at the same time, the test piece guide rail is used to ensure that the test pie...

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Abstract

The invention discloses an experimental device for automatically loading impacts on an SHPB (Split Hopkinson Pressure Bar) at a high temperature. The experimental device comprises a high-pressure air cylinder, an incident bar, a transmission bar, a base for the placement of the incident bar, the transmission bar and a test piece, and a test piece heater, wherein the test piece heater and the base are separately arranged; width-adjustable test piece guide rails for guiding the test piece from the test piece heater to the base are arranged between the test piece heater and the base; test piece baffle rods for limiting the test piece are arranged on one side of the test piece which is opposite to the base and the test piece guide rails; three-dimensional regulation of the base can be achieved. According to the adopted experimental device for automatically loading the impacts on SHPB at the high temperature, the test piece is uniformly heated, the experiment process is accurate, and the stability is high.

Description

[0001] technical field [0002] The invention relates to the research field of high-temperature dynamic mechanical properties of materials, in particular to a SHPB automatic impact loading test device for rods under high-temperature conditions. Background technique [0003] The experimental device represented by the Split Hopkinson Pressure Bar (SHPB) device is currently the main device for measuring various dynamic mechanical properties of materials, which can obtain various dynamic mechanical parameters of materials under high strain rates. With the continuous development of science and technology, it is more important to measure the dynamic mechanical property index of materials under high temperature and high strain rate conditions (such as fire, explosion, earthquake). Due to the material characteristics of concrete and rock, large-sized Hopkinson pressure rods should be used to measure their dynamic mechanical parameters. At present, the high-temperature separate H...

Claims

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Application Information

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IPC IPC(8): G01N3/30G01N1/44
Inventor 方秦陈力阮征姜锡权张锦华张亚栋相恒波于潇
Owner PLA UNIV OF SCI & TECH
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