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An electromagnetic Hopkinson torsion bar loading device

A technology with loading device and electromagnetic type, which is applied in the field of electromagnetic Hopkinson twisting rod loading device, can solve problems such as unavailable stress waves, and achieve the effects of simple operation, good repetitiveness, and strong controllability.

Active Publication Date: 2017-12-12
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the inability to control the stress wave existing in the prior art, the present invention proposes an electromagnetic Hopkinson torsion bar loading device

Method used

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  • An electromagnetic Hopkinson torsion bar loading device
  • An electromagnetic Hopkinson torsion bar loading device
  • An electromagnetic Hopkinson torsion bar loading device

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Embodiment Construction

[0038] This embodiment is an electromagnetic Hopkinson torsion bar loading device and test method.

[0039] The electromagnetic Hopkinson torsion bar loading device includes a power supply 4 , an electric energy storage and release device 3 and a torsion gun 2 . Wherein, the torsion gun includes a rotor 7, the joints 22 of the four stators 6 in the torsion gun are connected in series with wires to form a coil group, and the positive and negative terminals of the coils are respectively connected to the electric energy storage and release device 3 The positive output line and the negative output line are connected. The power supply 4 adopts 380V industrial three-phase alternating current.

[0040] In this embodiment, the electric energy storage and release device 3 adopts the power supply part of the electromagnetic riveting equipment published in the patent No. 200520079179, and the power supply part of the electromagnetic riveting includes a capacitor box and a control box. ...

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Abstract

An electromagnetic Hopkinson torsion bar loading device includes a power supply, an electric energy storage and release device and a torsion gun, and communicates with the electric energy storage and release device through wires; the electric energy storage and release device communicates with the power supply. The electric energy storage releaser is used to provide instantaneous high current to the stator coil of the torsion gun, so that the stator coil generates electromagnetic force on the permanent magnet on the rotor, and the rotor rotates to generate instantaneous torque. The torsion gun consists of a rotor and a stator, which are used to generate instantaneous torque and convert the instantaneous torque into torsional waves, which are output to the Hopkinson torsion bar through the rotor shaft. The actual torsional stress wave amplitude is controlled by the charging voltage of the electric energy storage and release device, and the actual torsional stress wave width is controlled by adjusting the capacitance value of the electric energy storage and release device. The traditional Hopkinson torsion bar sample is used. The material can be subjected to torsional loading under the expected pulse amplitude and pulse width, and the whole system is easy to operate and highly controllable.

Description

technical field [0001] The invention relates to a loading device and an experimental method for testing the dynamic torsional mechanical properties of materials, in particular to an electromagnetic Hopkinson torsion bar loading device and a testing method, and the device can be used as a loading device for a separate Hopkinson torsion bar experiment device. Background technique [0002] Although Hopkinson tension and compression equipment has been widely used to measure the mechanical properties of materials under high strain rate compression and tension. However, both the compression rod and the tension rod adopt the axial loading method. When the compression and tension longitudinal waves propagate, the waveguide rod is accompanied by mirror deformation, which produces a transverse inertia effect, resulting in wave dispersion and friction on the end surface of the sample, which affects the accuracy; while torsion The Hopkinson experimental equipment has no three-dimension...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/26
Inventor 李玉龙聂海亮索涛郭伟国汤忠斌
Owner NORTHWESTERN POLYTECHNICAL UNIV
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