Freezing and cryogenic impact testing device for Hopkinson pressure bar

Abstract

The invention discloses a freezing and cryogenic impact testing device for a Hopkinson pressure bar. The freezing and cryogenic impact testing device comprises a cryogenic experimental cabin, a condensing pipe, a push rod, a supporting bracket, a plurality of sample loading units, a plurality of roller shafts and a partition board, wherein the cryogenic experimental cabin is divided into an upper test chamber and a lower test chamber; the roller shafts are mounted inside the lower test chamber; the plurality of sample loading units are placed on the roller shafts respectively; during a test, each sample is placed on the upper surface of each sample loading unit; a supporting bracket platform of the supporting bracket is positioned at one end of the lower test chamber; a supporting bracket operating rod of the supporting bracket downwardly stretches out of a box body of the freezing and cryogenic impact testing device; one end of the push rod runs through a shell of the lower test chamber and is positioned inside the lower test chamber, and the push rod is as high as trays; and the other end of the push rod is positioned outside the shell of the lower test chamber. The freezing and cryogenic impact testing device is a testing device capable of achieving synchronization of a cryogenic freezing test and a cryogenic impact test so as to measure cryogenic dynamic mechanical properties of a material efficiently and accurately, 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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