Hopkinson bar electromagnetic loading device and implementation method

A technology of Hopkinson rods and loading devices, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems that the Hopkinson tension rod and compression rod are difficult to integrate, the stress size is difficult to adjust, and the stress waveform cannot be flexibly changed.

Pending Publication Date: 2022-04-29
XI AN JIAOTONG UNIV
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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a Hopkinson rod electromagnetic loading device and its implementation method in view of the deficiencies in the above-mentioned pri

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  • Hopkinson bar electromagnetic loading device and implementation method
  • Hopkinson bar electromagnetic loading device and implementation method
  • Hopkinson bar electromagnetic loading device and implementation method

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Embodiment Construction

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0047] In the description of the present invention, it should be understood that the terms "comprising" and "comprising" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude one or more other features, Presence or addition of wholes, steps, operations, elements, components and / or collections thereof.

[0048] It should also be understood that the terminology used in the descriptio...

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Abstract

The invention discloses a Hopkinson bar electromagnetic loading device and an implementation method, a stress wave loading device adopts a capacitor bank to provide instantaneous strong current for two magnetic field coils, a magnetic field is generated between the two coils, and the other capacitor bank provides instantaneous current for a force load. The force load with current is subjected to the action of electromagnetic force in a magnetic field, and the current flowing through the force load can be changed by changing the discharge parameters of the second capacitor bank, so that the magnitude and waveform of stress acting on the Hopkinson bar are changed. According to the invention, the stress of the Hopkinson bar can be flexibly adjusted, and the problem of stress wave generation in a complex loading mode is solved.

Description

technical field [0001] The invention belongs to the technical field of material mechanical performance testing, and in particular relates to a Hopkinson bar electromagnetic loading device and a realization method. Background technique [0002] The Hopkinson bar is an experimental technique widely used in testing the mechanical properties of materials at high strain rates. This technique was first proposed by Hopkinson in 1914 and was improved by Kolsky in 1949 by introducing a two-rod system, which places the A thin sample disk, with the impact of the impact rod, generates a compressive stress pulse in the incident rod, which will load the sample disk and generate reflected and transmitted pulses, the method is currently used to measure the material at high strain rates mechanical properties. [0003] Currently, most Hopkinson installations still use traditional pneumatic loading. The impact rod is usually fired by an air gun to strike the incident rod. Air is supplied f...

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Application Information

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IPC IPC(8): G01N3/02G01N3/317
CPCG01N3/02G01N3/317
Inventor 杨兰均路志建陆豪赫宋振飞唐小松
Owner XI AN JIAOTONG UNIV
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