Establishment of Simulation Methodology for Fabrication of High Performance Magnet

高性能磁体制造仿真方法的建立

基本信息

  • 批准号:
    11555184
  • 负责人:
  • 金额:
    $ 8.7万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    1999
  • 资助国家:
    日本
  • 起止时间:
    1999 至 2001
  • 项目状态:
    已结题

项目摘要

The objective of this research project is to establish a simulation scheme for fabrication of high performance magnets ; the higher the magnetic performance, the smaller the motor itself. However, there has been no scientific methodology for predicting or determining the optimum process for high magnetic performance. The concrete objectives are as follows :1) Establish a magneto-Cosserat continuum theory and a scheme based on this theory for simulating magnetic alignment during compaction of NdFeB magnetic powder in magnetic filed2) Carry out simulation based on paniculate modeling by developing a model that describes characteristics of NdFeB powder; thus compare with results of experiment on compaction in magnetic field.3) Investigate and study the relationship between magnetic alignment and conditions of compaction in magnetic field. The obtained results are as follows :1) Based on the determined parameters in the developed magneto-Cosserat theoy, we developed a simulation scheme tha … More t incorporated a model for describing the magnetic field that is induced by the magnetized particles. We then simulated compaction of NdFeB powder in magnetic field and found that under the applied magnetic field the effect of the field due to the magnetized particles is not influential, while thisgives quite a large effect on powder behvior when the applied magnetic field is removed. It was also observed that up to a relative density of 0.4 the density was higher at the upper part of the compact and lower at the bottom part; this agreed with experimental results.2) For a case where an initial density variation was given in the simulation, the magnetic alignment, which was best just after application of a magnetic field, became worse as compaction proceeded; this is in good agreement with experimental result.3) In-situ observation of the behavior of magnetic powder during compaction in an applied magnetic field revealed that the displacement of the particles were continuous and that the applied magnetic field displaced the powder more significantly near the bottom part of the powder.4) After compaction up to a relative density of 0.4, the density at the upper part was higher in compaction in magnetic field than in without magnetic field.Development of 3-D simulation scheme, which was one of the objectives, was not realized. This should be done for future work, so that actual application will become possible. Less
本研究的目的是建立一个高性能磁体制造的模拟方案;磁性能越高,电机本身就越小。然而,目前还没有科学的方法来预测或确定高磁性能的最佳工艺。具体目标如下:1)建立磁-Cosserat连续介质理论和基于该理论的NdFeB磁粉磁场压制过程磁取向模拟方案; 2)通过建立描述NdFeB磁粉特性的模型,进行基于粒子模型的模拟,并与磁场压制实验结果进行比较; 3)研究磁取向与磁场压制条件的关系。1)在已确定的磁-Cosserat理论参数的基础上,提出了一种模拟方案, ...更多信息 它结合了一个模型,用于描述由磁化粒子引起的磁场。然后对NdFeB粉末在磁场中的压制进行了模拟,发现在外加磁场作用下,磁化颗粒产生的磁场对粉末的压制效果没有影响,而当外加磁场消失时,磁化颗粒产生的磁场对粉末的压制效果有很大的影响。还观察到,当相对密度达到0.4时,压坯上部的密度较高,而底部的密度较低,这与实验结果一致。2)对于在模拟中给出初始密度变化的情况,在施加磁场后刚达到最佳的磁取向,随着压实的进行而变得更差; 3)对磁粉在外加磁场中压制过程中的行为进行了原位观察,发现磁粉的位移是连续的,且在磁粉底部附近,外加磁场对磁粉的位移更明显在相对密度为0.4的情况下,有磁场时上部的密度比无磁场时高,但作为目标之一的三维模拟方案的开发没有实现。今后的工作应该这样做,以便实际应用成为可能。少

项目成果

期刊论文数量(40)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
小寺秀俊, 島 進: "磁場中成形における磁性粉末の挙動に関する研究(粒子モデルによるシミュレーションと実験)"粉体および粉末冶金. 46巻11号. 1196-1200 (1999)
Hidetoshi Kodera、Susumu Shima:“磁性粉末在磁场中成形过程中的行为研究(使用粒子模型进行模拟和实验)”《粉末与粉末冶金》第 46 卷,第 11 期。1196-1200(1999 年)。
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    0
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S.Shima, H.Kotera: "In-situ observation of compaction behaviour of NdFeB magnetic powder after application of magnetic field"Prcc. Euro PM2001. Vol.3. (2001)
S.Shima,H.Kotera:“施加磁场后 NdFeB 磁粉压实行为的原位观察”Prcc。
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    0
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H.Kotera, S.Shima: "A Study of Magnetic Particles' Behaviour by Magneto-Cosserat Continuum Theory"IEEE Transactions on Magnetics. Vol.36. 1403-1406 (2000)
H.Kotera、S.Shima:“通过 Magneto-Cosserat 连续体理论研究磁性粒子的行为”IEEE Transactions on Magnetics。
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  • 影响因子:
    0
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  • 通讯作者:
S.Shima, H.Kotera: "Cosserat Continuum Theory to Simulate the Microscopic rotation of Magnetic Powder in Applied Magnetic Field"Int. J. Mech. Sci.. 42・1. 129-145 (2000)
S. Shima、H. Kotera:“模拟应用磁场中磁粉微观旋转的 Cosserat 连续介质” Int. Sci. 42・1 (2000)。
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SHIMA Susumu其他文献

SHIMA Susumu的其他文献

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{{ truncateString('SHIMA Susumu', 18)}}的其他基金

Constitutive Equation of flexible media and Simulation Method
柔性介质本构方程及仿真方法
  • 批准号:
    12650083
  • 财政年份:
    2000
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Establishment of Particle-micromechanics -Road to Net-shaping-
粒子微观力学的建立-净成形之路-
  • 批准号:
    08455334
  • 财政年份:
    1996
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Development of Metal Forming Robot-Spin forming Robot-
金属成形机器人的开发-旋压成形机器人-
  • 批准号:
    07555403
  • 财政年份:
    1995
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Computaional Study of Powder Compaction Process with a View to Particles Designing
以颗粒设计为目的的粉末压实过程的计算研究
  • 批准号:
    04452113
  • 财政年份:
    1992
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
Development of an Intelligent System for Sheet Metal Bending
钣金折弯智能系统的开发
  • 批准号:
    03555026
  • 财政年份:
    1991
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for Developmental Scientific Research (B)
Development of Simulation Method for Predicting Compact Shape in HIP and CIP
HIP 和 CIP 中预测致密形状的模拟方法的开发
  • 批准号:
    62850027
  • 财政年份:
    1987
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for Developmental Scientific Research
A study of compaction characteristics and properties after sintering of ceramic powders
陶瓷粉末烧结后的压实特性及性能研究
  • 批准号:
    61550056
  • 财政年份:
    1986
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
431570026160
431570026160
  • 批准号:
    60850023
  • 财政年份:
    1985
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for Developmental Scientific Research
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