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Electromagnetic induction type Hopkinson torsion and pressure bar loading device and experimental method

A technology of electromagnetic induction and loading device, which is applied in the direction of measuring device, using stable tension/pressure test material strength, force/torque/work measuring instrument, etc., which can solve the problem of difficult control of incident wave amplitude, limited strain range, tension The extension and compression loading devices cannot be unified, etc.

Active Publication Date: 2016-05-11
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the shortcomings in the prior art that the amplitude of the incident wave is difficult to control, the operation is cumbersome, the strain range is limited, some low strain rate experiments cannot be realized, and the tension and compression loading devices cannot be unified, the present invention proposes a Electromagnetic Induction Hopkinson Stretch Bar Loading Device and Experimental Method

Method used

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  • Electromagnetic induction type Hopkinson torsion and pressure bar loading device and experimental method
  • Electromagnetic induction type Hopkinson torsion and pressure bar loading device and experimental method
  • Electromagnetic induction type Hopkinson torsion and pressure bar loading device and experimental method

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Embodiment 1

[0057] This embodiment is a Hopkinson stress wave generator based on electromagnetic force, including a power supply 20 , a capacitor charger 21 and a loading gun 6 . The capacitor charger 21 adopts the power supply part of the existing electromagnetic riveting equipment, and the positive output line of the output of the capacitor charger 21 is connected with the positive line of the loading gun 6, and the negative output line is connected with the negative line of the loading gun 6 . The power supply 20 adopts 220V three-phase alternating current.

[0058] In this embodiment, the capacitor charger 21 adopts the power supply part of the electromagnetic riveting equipment disclosed in the patent No. 200520079179. In this embodiment, 10 electrolytic capacitors with a rated voltage of 1000 volts and a rated capacitance of 2000 microfarads are used The capacitor bank is formed in parallel, and the capacitor bank and the electronic switch are installed in the capacitor box, and th...

Embodiment 2

[0091] This embodiment is a Hopkinson stress wave generator based on electromagnetic force, including a power supply 20 , a capacitor charger 21 and a loading gun 6 . The capacitor charger 21 adopts the power supply part of the existing electromagnetic riveting equipment, and the positive output line of the output of the capacitor charger 21 is connected with the positive line of the loading gun 6, and the negative output line is connected with the negative line of the loading gun 6 . The power supply 20 adopts 220V three-phase alternating current.

[0092] In this embodiment, the capacitor charger 21 adopts the power supply part of the electromagnetic riveting equipment disclosed in the patent No. 200520079179. In this embodiment, 10 electrolytic capacitors with a rated voltage of 1000 volts and a rated capacitance of 2000 microfarads are used The capacitor bank is formed in parallel, and the capacitor bank and the electronic switch are installed in the capacitor box, and th...

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Abstract

The invention discloses an electromagnetic induction type Hopkinson torsion and pressure bar loading device and an experimental method. An anode output line of a capacitance charger is connected with an anode line of a loading gun while a cathode output line of the capacitance charger is connected with a cathode line of the loading gun, and consequently both compressive stress waves and tensile stress waves can be generated, and application to loading of Hopkinson torsion and pressure bars is realized. Loading systems of the Hopkinson torsion and pressure bars can be arranged on the same device, the strain rate and the strain range which are beyond the reach of traditional split Hopkinson torsion and pressure bar experiments are realized to further realize technical standardization of the Hopkinson torsion and pressure bar experiments, integration of torsion and pressure bar experiment devices is realized, and accordingly equipment complexity and space occupancy are reduced.

Description

technical field [0001] The present invention relates to a stress wave generating device and method for testing dynamic mechanical properties of materials, in particular to a stress wave generating device and method based on electromagnetic force. input device. Background technique [0002] At present, in the field of material science, the most widely used methods for measuring the mechanical properties of materials under high strain rates are split Hopkinson compression rod technology and tension rod technology. The basic principle of this method is: place a short sample between two tension rods or compression rods, and input a tensile stress wave or a compressive stress wave to the incident rod in a certain way to load the sample. Simultaneously, the pulse signal is recorded by using the strain gauge glued on the tie rod or the pressure rod at a certain distance from the end of the rod. If the tension or compression rod remains elastic, the pulses in the rod will propagat...

Claims

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Application Information

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IPC IPC(8): G01N3/317
CPCG01N3/317G01N2203/001G01N3/04G01N2203/0098G01N2203/0252G01N3/08G01N2203/0017G01N2203/0019G01N2203/005G01L5/00
Inventor 李玉龙聂海亮索涛汤忠斌
Owner NORTHWESTERN POLYTECHNICAL UNIV
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