Vertical Hopkinson pressure rod test device and test method

Abstract

The invention relates to a vertical Hopkinson pressure rod test device and test method. The vertical Hopkinson pressure rod test device comprises a guide cylinder, an incident rod, a transmission rod,a buffer rod and bullets and a base, wherein lateral support plates which are vertically arranged upwards are symmetrically arranged on two sides of the base; a horizontal first transverse support plate is arranged at the top between the lateral support plates on the two sides; three groups of horizontal second transverse support plates are sequentially arranged below the first transverse supportplate, between the lateral support plates on the two sides; each group of second transverse support plates is provided with a clamping mechanism, each group of clamping mechanisms clamps the corresponding incident rod, transmission rod or buffer rod, first strain gauge is pasted on the surface of each incident rod, a second strain gauge is attached to the surface of each transmission rod, according to the invention, the device can precisely control the impact speed of the bullets and obtain the low and medium impact speed, can be used to analyze the dynamic mechanical properties of low wave impedance materials such as coal, lightweight concrete and the like, and can satisfy dynamic experiments with high, meddle and low speeds.

Description

technical field [0001] The invention relates to a vertical Hopkinson compression bar test device and a test method for testing the dynamic mechanical properties of low-wave impedance materials such as coal, light concrete, and frozen soil. Background technique [0002] The Hopkinson compression bar technology was proposed by J.Hopkinson and B.Hopkinson in 1949. On this basis, Kolsky proposed a separate Hopkinson compression bar for measuring the dynamic mechanical properties of metal materials at high strain rates. After more than half a century of development, split Hopkinson pressure bar technology has become an important means to measure the dynamic mechanical properties of various materials. However, the existing separated Hopkinson struts are placed horizontally, and most of them are loaded pneumatically. This loading method has the following disadvantages: ①The loading strain rate is unstable; ②When the loading air pressure is large, the impact force generated is too l...

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Problems solved by technology

[0003] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a vertical Hopkinson compression bar test device, which can effectively solve the problem of dynamic mechanical performance testing of low wave impedance materials such as coal and lightweight concrete.

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