Magnetically-driven Hopkinson pressure lever testing device

A Hopkinson pressure rod and magnetic drive technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of shortening test time, high noise, and long time-consuming compressed air, so as to shorten test time, improve test accuracy, The effect of improving test efficiency

Inactive Publication Date: 2019-06-14
颜士伟 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a magnetically driven Hopkinson compression bar testing device for some defects in the prior art, which uses a magnetic drive to quickly accelerate the impact bar without an air compressor, providing The test conditions for dynamic mechanical properties of mate...

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  • Magnetically-driven Hopkinson pressure lever testing device
  • Magnetically-driven Hopkinson pressure lever testing device
  • Magnetically-driven Hopkinson pressure lever testing device

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Embodiment Construction

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, 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.

[0029] Such as Figure 1-6 As shown, a magnetically driven Hopkinson compression bar test device includes a frame, a magnetic drive module, an impact measurement assembly, and a data acquisition and processing module. The magnetic drive module and the impact measurement assembly are all assembled on the frame, and the The frame includes a fixed base 8 and a support base 3, and the support base 3 is arranged in a line and installed on the fixed base 8;

[0030] The magnetic d...

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Abstract

The invention discloses a magnetically-driven Hopkinson pressure lever testing device, which comprises a rack, a magnetically-driven module, an impact measurement component and a data collecting and processing module, wherein the rack comprises a fixed base and supporting seats which are distributed in a straight line shape and are installed on the fixed base; the magnetically-driven module comprises a stator, a rotor and a control system, wherein the stator is fixedly connected to the rack, and the rotor is assembled on a sliding rail in a stator inner hole; and the impact measurement component consists of a knock lever, an incident lever, a transmission lever and a buffer stop dog, wherein the knock lever, the incident lever, the transmission lever and the buffer stop dog are all assembled on the supporting seat. By use of the device, a high-accuracy high-strain-rate material dynamic mechanics performance test can be realized, the problems in a traditional air cannon type Hopkinson pressure lever testing process that air compression is long in time and large in noise, knock energy is unlikely to be accurately controlled and a knock lever is inconvenient in returning after testingis finished can be solved, Hopkinson pressure lever testing accuracy can be greatly improved, testing time is shortened, and testing efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of material dynamic mechanical performance testing, and in particular relates to a magnetically driven Hopkinson pressure bar testing device. Background technique [0002] The Hopkinson compression bar test technology was proposed by Hopkinson in 1914, and it could only be used to measure the pulse waveform under the impact load. In 1949, Kolsky improved the device by dividing the compression rod into two parts and placing the sample in it, so that the stress-strain relationship of the material under impact load can be measured. Because this device uses a split structure, it is called a split Hopkinson strut. The theoretical basis of Hopkinson's compression bar testing technology is the one-dimensional stress wave theory, and the stress-strain relationship of the sample material is deduced by measuring the strain on the compression bar. At present, it has been developed as the most important test method to...

Claims

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Application Information

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IPC IPC(8): G01N3/317
Inventor 颜士伟余世浩
Owner 颜士伟
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