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Establishment of Particle-micromechanics -Road to Net-shaping-

Research Project

Project/Area Number 08455334
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
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) OKIMOTO Kunio  Setsunan University, Mechanical Eng., Professor, 工学部, 教授 (30268487)
KOTERA Hidetoshi  Kyoto University, Mechanical Eng., Assoc, Professor, 工学研究所, 助教授 (20252471)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥6,300,000 (Direct Cost: ¥6,300,000)
Fiscal Year 1997: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 1996: ¥3,600,000 (Direct Cost: ¥3,600,000)
KeywordsPowder compaction / Simulation / Particle micro-mechanics / Particulate modeling / Continuum modeling / Near net shape / 個別要素法 / ニヤネットシェイプ成形 / コセラ連続体理論 / 粒子設計 / 磁場中成形
Research Abstract

The objective of this research project it first to establish fundamental theory for particle micro-mechanics that describes mechanical behavior of powder particles. ; second, based on this, to develop simulation method for investigating powder compaction behavior with a view to performing near net shape production. ; third, to develop a theory and simulation method for analyzing magnetic characteristics of magnetic devices such as permanent magnet. Magnet is usually made from anisotropic magnetic powders by compacting them in magnetic field ; rotation or alignment of the easy axs of magnetization during compaction determines the characteristics of the magnet ; in the production, scientific approach has not been undertaken, thus optimization of magnetic characteristics of these products is of geat importance. An attempt is made to develop a theory and method for controlling and optimizing the function of the magnet. The results obtained are as follows :
1)In simulation by particulate mod … More eling, we developed non-circular or non-spherical model, on top of circular or spherical model, that are easily treated.
2)Although inter-particle friction was incorporated in this simulation, it was not sufficient as resistant against relative movement. We developed a new model for friction that describes real resistant, and therefore, we shall be able to evaluate powder compaction process not only qualitatively but also quantitatively.
3)In the continuum approach, elastic properties of powder compacts were investigated experimentally, and we expressed the Young modulus in terms of relative density. Elasto-plastic finite element formulation was carried out combining plasticity theory for powder compaction. By applying this, we shall be able to simulate compaction processes for producing complicated shapes.
4)We developed a new magnetic Cosserat theory that describes local rotation. A finite element simulation was developed that is capable of analyzing rotation or alignment of easy axs of magnetization during compaction in applied magnetic field. It was thus shown that the strength of magnetic field and application pattern of magnetic field gave a decisive role to the alignment. The theory includes a few material parameters ; these were not yet determined in this project. This should be done for future work. Less

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] 島進: "粉体加工のFEMシミュレーション" 塑性と加工. 37・421. 177-182 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Kotera: "Behaviour of Magnetic Particles in Compaction" IEEE Tr.on Magnetics. 33・2. 1616-1619 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Shima: "A study of Mechanical Behaviour of Iron Powders by Three- and Two-dimensional Compaction" Proc.Int.Workshop Model. Meatal Powder Forming Processes. 9-18 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Shima: "A Study of Elastic Properties of Compact and Three-dimensional Elasto-Plastic Simulation" Proc.Int.Workshop Model. Meatal Powder Forming Processes. 33-40 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 島進: "ネットシェイプ成形を支援する粉末成形のプロセスのシミュレーション" 塑性と加工. 37・436. 437-440 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Shima: "FEM Simulation of powder compaction" Jr.Japan Soc.Tech.Plasticity. 37-421. 177-182 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Kotera: "Behavior of Magnetic Particles in Compaction" IEEE Tr.on Magnetics. 33-2. 1616-1619 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Shima: "A Study of Mechanical Behavior of Iron Powders by Three-and Two-dimensional Compaction" Proc.Int.Workshop Model.Metal Powder Forming Processes. 9-18 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Shima: "A Study of Elastic Properties of Compact and Three-dimensional Elasto-Plastic Simulation" Proc.Int.Workshop Model.Metal Powder Forming Processes. 33-40 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Shima: "Simulation of powder compaction processes aiding near-net shape production" Jr.Japan Soc.Tech.Plasticity. 37-436. 437-440 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 島 進: "粉体加工のFEMシミュレーション" 塑性と加工. 37・421. 177-182 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Kotera: "Behaviour of Magnetic Particles in Compaction" IEEE Tr.on Magnetics. 33 2. 1616-1619 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] S.Shima: "A study of Mechanical Behaviour of Iron Powders by Three- and Two-dimensional Compaction" Proc.Int.Workshop Model.Metal Powder Forming Processes. 9-18 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] S.Shima: "A Study of Elastic Properties of Compact and Three-dimensional Elasto-Plastic Simulation" Proc.Int.Workshop Model. Metal Powder Forming Processes. 33-40 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 島 進: "ネットシェイプ成形を支援する粉末成形プロセスのシミュレーション" 塑性と加工. 37・436. 437-440 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Hidetoshi KOTERA: "PARTICLE DYNAMICS SIMULATION FOR BEHAVIOR OF ELLIPTICAL PARTICLES" ADVANCES in Powder Metallurgy & Particulate Materials. Vol.2. 7-101-7-115 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Susumu SHIMA: "A STUDY OF IRON POWDERS BY THREE-DIMENSIONAL COMPACTION" ADVANCES in Powder Metallurgy & Particulate Materials. Vol.2. 7-193-7-205 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 島 進: "圧粉体の弾性変形挙動" 第47回塑性加工連合講演会講演論文集. 227-228 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 島 進: "粉末の三次元成形の粒子系シミュレーション(非球形モデルと圧粉時の粒子挙動)" 第47回塑性加工連合講演会講演論文集. 229-230 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 小寺 秀俊: "コセラ連続体理論を用いた磁場中成形解析(第三報:磁場のかけ方と密度の関係及び粒子配向のモデル化手法)" 第47回塑性加工連合講演会講演論文集. 231-232 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 小寺 秀俊: "粉体微粒子の圧縮試験" 第47回塑性加工連合講演会講演論文集. 249-250 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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