Freezing and cryogenic impact testing device for Hopkinson pressure bar

Abstract

A freezing and low-temperature impact test device for Hopkinson pressure rods, including a low-temperature experiment chamber, a condensation pipe, a push rod, a bracket, multiple sample bearing units, rollers and partitions. The cryogenic experiment cabin is divided into an upper test chamber and a lower test chamber. The rollers are installed in the lower test chamber. A plurality of sample bearing units are respectively placed on the roller; each sample is respectively placed on the upper surface of each sample bearing unit during the test. The bracket platform of the bracket is located at one end of the lower test chamber; the bracket operating rod of the bracket extends downward to the outside of the device box. One end of the push rod passes through the shell of the lower test chamber and is located in the lower test chamber, and the height of the push rod is the same as that of the tray; the other end of the push rod is located outside the shell of the lower test chamber. The invention is a test device capable of simultaneously implementing low-temperature freezing test and low-temperature impact test of material samples, so as to efficiently and accurately measure the low-temperature dynamic mechanical properties of materials, and has the characteristics of high reliability and simple structure.

Description

technical field [0001] The invention relates to a freezing and low-temperature impact test device for a Hopkinson compression bar, belonging to the technical field of material mechanical performance testing. Background technique [0002] Split Hopkinson Pressure Bar (Split Hopkinson Pressure Bar) experimental technology is the most important and reliable experimental method for studying the mechanical properties of materials under medium and high strain rates. The Split Hopkinson Pressure Bar experimental device has simple structure, convenient operation, It has the advantages of delicate measurement, and the various loading techniques, testing techniques and data processing methods involved are relatively mature. [0003] The strain rate sensitivity of general engineering materials is within 10 2 ~10 4 the s -1 The change in the strain rate range is relatively severe, so the split Hopkinson pressure bar has become the most basic experimental device for testing the dynami...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the complex structure of the device in the prior art, the difficulty in processing and installation, and the low test efficiency, high energy consumption and large disturbance to the low temperature test environment, the present invention proposes a Hopkinson compression bar Freezing and low temperature shock test device

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