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A Calculation Method of Maximum Magnetization Generated by Magnetostrictive Materials

A magnetostrictive material and magnetization technology, applied in magnetization measurement, calculation, computer-aided design, etc., can solve the problems that cannot be used to describe the nonlinear relationship of giant magnetostrictive materials, difficult to obtain accurate values, and low precision , to achieve the best magnetization performance, accurate provision, and the effect of precise important parameters

Inactive Publication Date: 2020-10-23
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The linear constitutive relationship of materials currently established is used to analyze and describe the intrinsic conversion relationship between magnetism and machine in materials, and can only be used in engineering applications with low precision. The established model can only reflect the material in a specific linear region. Coupling relationship, which cannot be used to describe the nonlinear relationship of giant magnetostrictive materials
[0003] Since the establishment of the magnetostrictive material model in the prior art is too simple, it is difficult to accurately value the important parameters in the magnetostrictive material device, and it is impossible to obtain the best application performance of the magnetostrictive material

Method used

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  • A Calculation Method of Maximum Magnetization Generated by Magnetostrictive Materials
  • A Calculation Method of Maximum Magnetization Generated by Magnetostrictive Materials
  • A Calculation Method of Maximum Magnetization Generated by Magnetostrictive Materials

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Embodiment

[0155] Taking the giant magnetostrictive rod composed of Terfenol-D material as an example to calculate the maximum magnetization intensity produced by the magnetostrictive material, the length of the giant magnetostrictive rod is 40mm and the diameter is 5mm.

[0156] The free energy equation is established by taking a single magnetic domain in a magnetostrictive material as the research object:

[0157] E=E k +E σ +E H Formula 1

[0158] In formula 1, E is the free energy;

[0159] E. k is the anisotropic energy of the magnetocrystal;

[0160] E. σ is the stress anisotropy;

[0161] E. H is the magnetization energy.

[0162] Expression 1 is expressed in the X coordinate system, and the X coordinate system is as follows figure 1 As shown, take the [100] crystal axis direction as the x axis, take the [010] crystal axis direction as the y axis, take the [001] crystal axis direction as the z axis, and the direction of the applied magnetic field and stress as the [110]...

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Abstract

The invention provides a calculation method of maximum magnetization intensity externally generated by a magnetostrictive material. The method includes: using a single magnetic domain in the magnetostrictive material as a research object to establish a nonlinear free energy equation; bringing a preset value of an externally applied magnetic field and a preset value of externally applied stress to the nonlinear free energy equation for solving; analyzing laws of influences of the externally applied magnetic field and stress on deflection of the magnetic domain according to a solving result; obtaining best values of the externally applied magnetic field and stress; and calculating the maximum magnetization intensity externally generated by the magnetostrictive material. Compared with the prior art, the method researches laws of the angle deflection of the magnetic domain in the magnetostrictive material through extremum solving for the nonlinear free energy equation of a single domain particle in the material, and then describes magnetization and magnetic-mechanical coupling characteristics of the material, obtains the best values of the externally applied magnetic field and stress, thus calculates the magnetization intensity externally generated by the magnetostrictive material, is high in accuracy, and can more precisely provide important parameters for a magnetostrictive material device.

Description

technical field [0001] The invention relates to the technical field of magnetostrictive materials, in particular to a method for calculating the maximum magnetization generated by a magnetostrictive material. Background technique [0002] The establishment and improvement of the magnetic energy coupling model of the magnetostrictive material machine has always been a hot spot and difficult point of research by domestic and foreign scholars and experts, and it is also a prerequisite for the application of broadband and high-performance devices that directly affect and restrict magnetostrictive materials. When the actuator based on the magnetostrictive material is working, it will be subjected to the double load coupling effect of the excitation magnetic field and the mechanical stress. Superposition greatly increases the difficulty of establishing material theory models. In engineering applications, the approximate linear piezoelectric-magnetic relationship is generally used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G01R33/12G06F119/14
CPCG01R33/1215G06F30/20G06F2119/06
Inventor 王亚文严柏平
Owner GUANGDONG UNIV OF TECH
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