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Material dynamic mechanical parameter acquisition device and method

A technology of dynamic mechanics and parameter acquisition, which is applied in the direction of measuring devices, analyzing materials, and testing the strength of materials by applying a stable torsion force. Wave synchronization problem, good experimental repeatability effect

Inactive Publication Date: 2018-09-11
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The embodiment of the present invention provides a device and method for obtaining dynamic mechanical parameters of materials, which can solve the problem of low precision of stress wave control in the prior art

Method used

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  • Material dynamic mechanical parameter acquisition device and method
  • Material dynamic mechanical parameter acquisition device and method
  • Material dynamic mechanical parameter acquisition device and method

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Embodiment 1

[0054] This embodiment provides a device for acquiring dynamic mechanical parameters of materials, which includes an electromagnetic Hopkinson tie rod loading unit, an electromagnetic Hopkinson torsion bar loading unit, and a stress wave synchronization unit. The above components will be described in detail below.

[0055] The electromagnetic Hopkinson rod loading unit includes a power supply 21, a stretching wave capacitor charger 2 and a stretching wave loading gun 3; the stretching wave capacitor charger 2 adopts the power supply part of the existing electromagnetic riveting equipment, and the stretching wave capacitor charger 2 adopts the power supply part of the existing electromagnetic riveting equipment, and The positive output line of the output of the wave capacitor charger 2 is connected with the positive line of the tensile wave loading gun 3, and the negative output line is connected with the negative line of the loading gun; the tensile wave loading gun 3 includes a...

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Abstract

The embodiment of the invention provides a material dynamic mechanical parameter acquisition device and method, and aims to solve the problem of low stress wave control accuracy in the prior art. Thedevice comprises an electromagnetic type Hopkinson pull rod loading unit, an electromagnetic type Hopkinson torsion rod loading unit, a stress wave synchronization unit and an acquisition unit. The method comprises the steps of loading a pulling stress wave; loading a torsion stress wave; acquiring a pulling stress parameter of a sample; and acquiring a torsion stress parameter of the sample, wherein the pulling stress parameter of the sample and the torsion stress parameter of the sample are adopted as material dynamic mechanical parameters. According to the material dynamic mechanical parameter acquisition device and method provided by the embodiment of the invention, a torsion stress wave generating device and a pulling stress wave generating device driven by electromagnetism are applied to a Hopkinson pulling-torsion coupling experiment, so that the generation time, the pulse width and the amplitude of a torsion stress wave and a pulling stress wave produced by the experiment device can be accurately controlled.

Description

technical field [0001] The present invention relates to a device and method for obtaining dynamic mechanical parameters of materials, in particular to a device and method for obtaining dynamic mechanical parameters of materials based on an electromagnetic force-based tensile stress wave-torsional stress wave coupling generating unit, the tensile stress wave- The torsional stress wave coupling generating unit can be used as the stress wave loading unit in the separate Hopkinson tensile-torsional composite loading experiment. Background technique [0002] The Hopkinson rod experimental unit has been one of the most widely used methods for measuring the mechanical parameters of materials at high strain rates. These include the Hopkinson compression bar technique, tension bar technique, and torsion bar technique for measuring uniaxial compression, tension, and torsion parameters of materials at high strain rates, respectively. Its main principle is: place the sample of the mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N3/22
CPCG01N3/08G01N3/22G01N2203/0017G01N2203/0021G01N2203/0026G01N2203/005
Inventor 李玉龙刘琛琳金康华聂海亮索涛
Owner NORTHWESTERN POLYTECHNICAL UNIV
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