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Material examination device based on electromagnetic thermal multi-physical field synchronous loading

A technology of multi-physics and electromagnetic repulsion, which is applied in the direction of material analysis, measuring devices, and analysis materials through electromagnetic means, to achieve the effects of uniform loading, reduced spacing, and reliable stress transmission

Pending Publication Date: 2022-04-26
XI AN JIAOTONG UNIV
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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 material assessment device based on the synchronous loading of electromagnetic thermal multi-physics fields in view of the above-mentioned deficiencies in the prior art. Problems that can interact with materials in equivalent simulations provide a multi-physics equivalent loading platform with controllable parameters for material research

Method used

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  • Material examination device based on electromagnetic thermal multi-physical field synchronous loading
  • Material examination device based on electromagnetic thermal multi-physical field synchronous loading
  • Material examination device based on electromagnetic thermal multi-physical field synchronous loading

Examples

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Embodiment

[0060] The power processing unit generates two pulse currents, and the timing of the two pulse currents is controlled by a synchronous trigger device. One of them supplies power to the main circuit. Discharge on a 20mm aluminum sample, the temperature of the sample rises due to ohmic heat, and the temperature rise rate reaches 10 5 ℃ / s; another pulse current supplies power to the electromagnetic repulsion coil circuit, generating a current such as image 3 As shown, the repulsive disk generates electromagnetic force as Figure 4 As shown, the generated stress wave acts downward to the sample with the stress wave amplifier, and an equivalent stress greater than 500 MPa is generated on the sample, which reaches the equivalent condition of strain rate when the material failure occurs in the electromagnetic track.

[0061] During the working process, the power processing unit is decoupled and recombined to form two pulse power modules, and the discharge sequence of the two circui...

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Abstract

The invention discloses a material examination device based on electromagnetic thermal multi-physical field synchronous loading, a synchronous loading platform is connected with a pulse power supply through a sample-tray circuit and an electromagnetic repulsion coil circuit, and the pulse power supply is used for discharging for the sample-tray circuit and the electromagnetic repulsion coil circuit; the pulse power supply is connected with a synchronous trigger device, the synchronous trigger device is used for providing a trigger signal for the pulse power supply and controlling the discharge time sequence of the sample-tray circuit and the electromagnetic repulsion coil circuit, and the sample-tray circuit is used for controlling the discharge time sequence of the electromagnetic repulsion coil circuit in the synchronous loading process of the synchronous loading platform. Applying high pressure to two ends of the sample arranged on the synchronous loading platform; and the electromagnetic repulsion coil circuit is used for acting stress waves on the sample in the synchronous loading process of the synchronous loading platform. A synchronous loading mode is adopted to solve the problem of equivalent simulation of interaction of electromagnetic energy and materials under a multi-field coupling extreme condition in an electromagnetic emission process.

Description

technical field [0001] The invention belongs to the technical field of pulse power, and in particular relates to a material assessment device based on synchronous loading of electromagnetic thermal multi-physics fields. Background technique [0002] During the launching process of the electromagnetic track, the armature and the guide rail will be in the extreme environment of electromagnetic thermal power such as several megaamperes of extremely high current, millions of watts of extremely high power, and tens of Tesla strong magnetic fields, resulting in electromagnetic, structural, The complex situation of temperature multi-physics and multi-phase state coupling, including: changes in the electrical conductivity, thermal conductivity and mechanical properties of metal materials, changes in the emission contact performance of the guide rail-armature contact surface, etc., thus affecting the conversion efficiency of electromagnetic energy and kinetic energy, reducing the orbi...

Claims

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Application Information

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IPC IPC(8): G01N3/00G01N17/00G01N25/00G01N27/00
CPCG01N3/00G01N17/00G01N25/00G01N27/00G01N2203/0226G01N2203/0236
Inventor 陈立李伟昊蒋仕贺玉哲李兴文谷坤泉郝世宇胡前程
Owner XI AN JIAOTONG UNIV
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