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1998 Fiscal Year Final Research Report Summary

Development of Analytical and Experimental Technologies for Crystal Morphological Control Fabrication of Hyper-Formability Material

Research Project

Project/Area Number 08455065
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Materials/Mechanics of materials
Research InstitutionOsaka Institute of Technology

Principal Investigator

NAKAMACHI Eiji  Osaka Institute of Technology, Faculty of Engineering, Professor, 工学部, 教授 (60099893)

Co-Investigator(Kenkyū-buntansha) SHIBUTANI Yoji  Osaka University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (70206150)
NAKAYASU Hidetoshi  Konan University, Faculty of Science, Professor, 理学部, 教授 (80142553)
MASAKI Saiji  Osaka Institute of Technology, Faculty of Engineering, Professor, 工学部, 教授 (30079537)
Project Period (FY) 1996 – 1998
KeywordsCrystal plasticity theory / finite element method / optimum design / crystal lattice / crystal orientation / texture / hardening-softening evolution / material fabrication design
Research Abstract

The crystalline plasticitybased finite element technology revealed the great progress in the field of mesomaterial engineering to study the strength and formability, Further the fabrication technology based on these crystal control has been developed very much by using computer simulation, such like the finite element analyses. For this phenomenological mesomaterial modeling for the finite element analyses, the parameter identification is required by employing the experimental observation results of single and poly crystal material deformations. In this research, the hardening - softening evolution equation has been proposed and embedded in the elastic/crystalline plastic constitutive equation. The uni-axis tension tests of pure aluminum single crystal under the condition of different directions between the crystalline orientation {010} and tensile axis, has provided the stress-strain relationship, slip lines and strain localization patterns. It is demonstrated that the numerical resul … More ts of deformation and strain localization of single crystal rectangular sheet tension shows good agreements with the experimental observations, which elucidate the anisotropic effects on the deformation clearly.
This elastic/crystalline viscoplastic finite element analysis tool is also applied to design the crystalline orientation distributions- texture - of the sheet metal in conjunction with the discretized optimization methods, such like the grid method, simplex method, the sweeping simplex method, the simulated annealing method and hybrid method. These system try to find the hyper-formability sheet metal. We investigate how the interaction between the slip-system affects on the strain localization and formability of the sheet. These polycrystalline morphology of aluminum sheet was modeled by employing the Voronoi polygons and the selected orientations - texture - of FCC cold rolled sheet. It demonstrated that the proposed design system found the best combination of selected orientations which has the best formability. Less

  • Research Products

    (28 results)

All Other

All Publications (28 results)

  • [Publications] 仲町英治, 布施秀晃: "超微小圧子押し込み問題の弾/結晶粘塑性有限要素解析" 日本機械学会論文集(A). 64-622. 1535-1540 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 仲町英治, 平岩幸二郎: "影響範囲距離効果を考慮した結晶塑性構成式に基づく弾/結晶粘塑性有限要素解析" 日本機械学会講演論文集. 98-5A. 157-158 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Nakamachi.E.: "Elastic/Crystalline Viscoplastic Finite Element Modeling Based on Hardening-Softening Evolution Equation." Simulation of Materials Processing : Theory, Methods and applications A.A.BALKEMA. 315-32〓 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Nakamachi.E.: "Optinum Design of Sheet Material and Sheet Forming Process by Using Virtual Manufacturing System." Proc. Fourth World Congress on Computational Mechanics. VI-J. J1-J6 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 坂本英俊, 仲町英治: "サーモビューアーによる塑性変形解析(結晶粒径の相違によるひずみ集中への影響)" 日本機械学会講演論文集. 98-5B. 423-424 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 仲町英治, 平岩幸二郎: "硬化・軟化発展方程式に基づく微視結晶塑性不安定問題の有限要素解析" 平成10年度塑性加工春季講演会講演論文集. 225-226 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Nakamachi, E.: "Static-explicit elastic plastic finite element simulation and virtual manufacturing of sheet metal forming" Engineering Computations. Vol.13, No.2/3/4. 283-307 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nakamachi, E.and Dong, X.: "Elastic/Crystalline-Viscopiastic Finite Element Analysis of Dynamic Deformation of Sheet Metal" Engineering Computations. Vol.13, No.2/3/4. 308-326 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nakamachi, E.and Huo, T.: "Dynamic-Explicit Type Elastic Plastic Finite Element Simulation of Sheet Metal Forming-Hemispherical Punch Drawing" Engineering Computations. Vol.13, No.2/3/4. 327-338 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nakamachi, E.and Wang, S.P.: "Development of Dynamic Explicit FEM Code for Sheet Metal Forming Simulation" Advances in Engineering Plasticity and its applications, Proc.of AEPA'96. 721-726 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Dong, X.and Nakamachi, E.: "Prediction of Plastic Instability of Sheet Metal by Using Elastic/Crystalline Viscoplastic FE Analysis" Proc.of NUMISHEET'96. 136-143 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Dong, X.and Nakamachi, E.: "Elastic/Crystalline Visoplastic FE Simulation of Sheet Forming Processes" Proc.of 5th International Conference on Technology of Plasticity. 787-790 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nakamachi, E.: "Analysis of Plastic Deformation Process of Polycrystal and Optimum Design" Proc.of Int.Seminar on Quasi-Impulsive Analysis. A4-1-A4-20 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kawka, M., Makinouchi, A., Wang, S.P.and Nakamachi, E.: "Advances and Trends in Sheet Metal Forming Simulation in Japanese Automotive Industriy" Sheet Metal Stamping, SP-1221, Sosiety of Automotive Engineers. 7-13 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nakamachi, E.: "Elastic/Crystalline Viscoplastic Finite Element Analysis and Optimum Fabrication Design of Sheet Metal" Proc.of 5th Computational Plasticity. 101-118 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nakamachi, E.and Dong, X.: "Study of Texture Effect on Sheet Failure in LDH Test by Using Elastic/Crystalline Viscoplastic FE Analysis" J.Appl.Mech., Trans.ASME (ser.E). Vol.64. 519-524 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Wang, S.P and Nakamachi, E.: "The Inside-Outside Contact Search Algorithm for Finite Element Analysis" Int.J.Numer.Methods in Engrg.Vol.40. 3665-3685 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nakamachi, E.: "Optimum Design of Metal Forming Based on Finite Element Analysis and Nonlinear Programming, Teoretical and Applied Mechanics, Eds.Tatsumi, T., Watanabe, E.and Kambe, T." Elsevier Science B.V. 323-340 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nakamachi, E.: "Elastic/Crystalline Viscoplastic Finite Element Modeling Based on Hardening-Softening Evolution Equation, Simulation of Materials Processing : Theory, Methods and Applications, Eds.Huetink, J.and Baaijens, F.T.P." A.A.BALKEMA. 315-321 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nakamachi, E.: "OptimumDesign of Sheet Material and Sheet Forming Process by Using Virtual Manufacturing System" Proc.Fourth World Congress on Computational Mechanics, VI-J,Forming session. J1-J6 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ohata, T., Nakamura, Y., Katayama, T., Nakamachi, E., Omori, N.: "Improvement of Optimum Process Design System by Numerical Simulation" J.Mater.Process, Technol.80-81. 635-641 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nakamachi, E.and Honda, T.: "Optimum Design of Sheet Forming Process by Using Finite Element and Discretized Optimization Methods" Int.J.Forming Processes. 1-2. 163-185 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Ogawa, A.Taniyama, Y.Tomita, Y.Shibutani & T.Adachi: "Local Deformation Behavior around Ringed Notch in TRIP Steel Bars under Tension" Proc.of AEPA'96 edited by T.Abe & T.Tsuta, Pergamon. 599-603 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Shibutani, J.L.Bassani & V.Vitek: "Mesoscopic Nonlocal Properities by linking Approach of Generalized Continuum to Atomistic Model" Proc.of AEPA'96 edited by T.Abe & T.Tsuta, Pergamon. 483-488 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Shibutani, J.Toryu & Y.Tomita: "Pattern Formation of Atomic Structure Observed in Stress-induced Phase Transformation Process" Proc.of IMMM'97, Mie Univ.Press. 65-70 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Shibutani: "Nonlocal Elastic Constants of Centrosymmetric Homogeneous Lattice Structure and Inhomogeneous One" JSME Int.J., Series A.Vol.41, No.4. 547-553 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Shibutani, V.Vitek & J.L.Bassani: "Nonlocal Properties of inhomogeneous Structures by Linking Approach of Generalized Continuum to Atomistic Model" Int.J.Mech.Sci.Vol.40, Nos.2-3. 129-137 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Shibutani: Instability Analyses of Stress-induced Phase Transformation, Mesoscopic Dynamics of Fracture edited by H.Kitagawa, T.Aihara, Jr.& Y.Kawazoe. Springer, 100-110 (1998)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-12-08  

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