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shpb automatic rod impact loading experimental device under high temperature conditions

A technology for loading experiments and experimental devices, which is applied in the direction of using a single impact force to test the strength of materials and the preparation of samples for testing. Safety and security, accurate experimental process, and high heating efficiency

Active Publication Date: 2015-12-30
PLA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 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 is different under different gas pressures, and the action time of the support is also different under different pushing pressures, so this device is likely to cause the test piece not to be in complete contact with the incident rod and the transmission rod, and the entire impact process has ended. Inaccurate, poor stability, and even lead to the failure of the entire experiment

Method used

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  • shpb automatic rod impact loading experimental device under high temperature conditions
  • shpb automatic rod impact loading experimental device under high temperature conditions
  • shpb automatic rod impact loading experimental device under high temperature conditions

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Embodiment Construction

[0021] 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 for placing the incident rod 7, a transmission rod 15 and a test piece, and the test piece The heating device 10 is arranged separately from the base 14. The heating device 10 and the base 14 are provided with a test piece guide rail 12 with adjustable width that guides the test piece from the heating device to the base 14, on the 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 that defines the position of the test piece, and the base 14 is three-dimensionally adjustable.

[0022] The test piece heating device is separated from the base, so that the test piece can be heated evenly. At the same time, the test piece guide rail is used to ensure that the test piece rolls in...

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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

Technical field [0001] The invention relates to the research field of high-temperature dynamic mechanical properties of materials, in particular to an experimental device for SHPB automatic impact loading on a rod under high-temperature conditions. Background technique [0002] 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, and various dynamic mechanical parameters of materials at high strain rates can be obtained. With the continuous development of science and technology, it is more important to measure the dynamic mechanical properties of materials under high temperature and high strain rate conditions (such as fire, explosion, and earthquake). Due to the material properties of concrete and rock, large-size Hopkinson pressure rods should be used to measure their dynamic mechanical parameters. At present, high-temperature separated Hopkinson press...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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