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Establishment of Simulation Methodology for Fabrication of High Performance Magnet

Research Project

Project/Area Number 11555184
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Material processing/treatments
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

SHIMA Susumu  Kyoto University, Mechanical Eng., Professor, 工学研究科, 教授 (70026160)

Co-Investigator(Kenkyū-buntansha) HOJO Masaki  Kyoto University, Mechanical Eng, Professor, 工学研究科, 助教授 (70252492)
WASHIZU Masao  Kyoto University, Mechanical Eng, Professor, 工学研究科, 教授 (10201162)
KOTERA Hidetoshi  Kyoto University, Mechanical Eng, Professor, 工学研究科, 教授 (20252471)
ENDO Masaharu  Sumitomo Special Metals Co., NEOMAX Sec. Manager, ネオマックス事業部, 技術部長
OKIMOTO Kunio  Setsunan University, Mechanical Eng, Professor, 工学部, 教授 (30268487)
Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥13,600,000 (Direct Cost: ¥13,600,000)
Fiscal Year 2001: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2000: ¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 1999: ¥8,000,000 (Direct Cost: ¥8,000,000)
KeywordsCompaction in magnetic field / Magneto-Cosserat theory / Magnetic alingnment / Structural anisotropy / In-situ observation / Image processing / 配向解析 / パルス磁場 / 粒子挙動解析法 / 非球形モデル / コセラせん断係数
Research Abstract

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 filed
2) 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

Report

(4 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (30 results)

All Other

All Publications (30 results)

  • [Publications] H.Kotera, S.Shima: "Magnetic Powder Characteristics Simulated by 3D Particle Dynamics Method"Advanced Tech. Plasticity, (ed. M Geiger). Vol.2. 1345-1350 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 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)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 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)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Shima, H.Kotera: "3-D Simulation of Magnetic Particles' Behaviour during Compaction in a Magnetic Field"Powder Technology. 109. 234-240 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Kotera, S.Shima: "3-D Particulate Modeling for Simulation of Compaction in Magnetic Field"IEEE Transactions on Magnetics. Vol.36. 1519-1522 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Kotera, S.Shima: "A Study of Magnetic Particles' Behaviour by Magneto-Cosserat Continuum Theory"IEEE Transactions on Magnetics. Vol.36. 1403-1406 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 島 進, 小寺秀俊: "多段形状圧粉体の成形プロセスの有限要素解析"粉体および粉末冶金. 47巻12号. 1312-1317 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 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)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Shima et al.: "Simulation of the Isostatic Compaction of Metallic Powders by the Distinct Element Method"CD-ROM Proc. 3^<rd> Int. Conf. Intelligent Process. & Manuf. Matls.. (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Kotera & S. Shima: "Magnetic Powder Characteristics Simulated by 3D Particle Dynamics Method"Advanced Tech. Plasticity, (ed. M Geiger). Vol.2. 1345-1350 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Kotera & S. Shima: "A Study of Magnetic Powder's Bhaviour during Compaction in Magnetic Field - Particle Dynamics Simulation and Experiment -"fJ. Japan Soc. Powder & Powder Metall. Vol.46-11. 1196-1200 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Shima & H.Kotera: "Cosserat Continuum Theory to Simulate the Microscopic rotation of Magnetic Powder in Applied Magnetic Field"Int. J. Mech. Sci.. Vol.41-2. 129-145 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Shima & H.Kotera: "3-D Simulation of Magnetic Particles' Behaviour during Compaction in a Magnetic Field"Powder Technology. 109. 234-240 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Kotera & S. Shima: "3-D Particulate Modeling for Simulation of Compaction in Magnetic Field"IEEE Transactions on Magnetics. Vol. 36-2. 1519-1522 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H, Kotera & S. Shima: "A Study of Magnetic Particles' Behaviour by Magneto-Cosserat Continuum Theory"IEEE Transactions,on Magnetics. Vol.36-2. 1403-1406 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S. Shima & H.Kotera: "Finite Element Simulation of Compacting Process if Multi-stepped Part"J.Japan Soc. Powder & Powder Metall. Vol.47-12. 1312-1317 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 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)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Shima et.al: "Simulation of the Isostatic Compaction of Metallic powders by the Distinct Element Method"Proc. 3^<th> Int. Conf. Intelligent Process. & Manuf. Matls. (CD-ROM). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 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)

    • Related Report
      2001 Annual Research Report
  • [Publications] S.Shima et al.: "Simulation of the Isostatic Compaction of Metallic Powders by the Distinct Element Method"CD-ROM Proc. 3^<rd> Int. Conf. Intelligent Process. & Manuf. Matls.. (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] H.Kotera & S.Shima: "3-D Particulate Modeling for Simulation of Compaction in Magnetic Field"IEEE Transactions on Magnetics. Vol.36. 1519-1522. (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Kotera & S.Shima: "A Study of Magnetic Particles'Behaviour by Magneto-Cosserat Continuum Theory"IEEE Transactions on Magnetics. Vol.36. 1403-1406 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 島進,小寺秀俊: "多段形状圧粉体の成形プロセスの有限要素解析"粉体および粉末冶金. 47巻12号. 1312-1317 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Kotera & S.Shima: "3-D Simulation of Magnetic Particles'Behaviour during Compaction in a Magnetic Field"Powder Technology. 109. 234-240 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 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)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Kotera & S.Shima: "Magnetic Powder Characteristics Simulated by 3D Particle Dynamics Method"Advanced Tech. Plasticity, (ed. M Geiger). Vol.2. 1345-1350 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] H.Kotera & S.Shima: "Magneto-Cosserat Continuum Theory for Simulating the Magnetic Powder Behaviour during Compaction in Applied Magnetic Field"Advanced Tech. Plasticity, (ed. M Geiger). Vol.2. 1351-1356 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 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用)"粉体および粉末冶金. 46巻11号. 1196-1200 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 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)

    • Related Report
      1999 Annual Research Report
  • [Publications] S.Shima & H.Kotera: "3-D Simulation of Magnetic Particles' Behaviour during Compaction in a Magnetic Field"Powder Technology. (2000)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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