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PPREDICTION OF FREE BOUNDARY IN SOLIDIFICATION ANALYSIS BASED ON INTEGRAL PENALTY METHOD AND ALE CONTROL

Research Project

Project/Area Number 09650100
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Materials/Mechanics of materials
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

IMATANI Shoji  Kyoto University, Department of Energy Conversion Science, Associate Professor, エネルギー科学研究科, 助教授 (70191898)

Co-Investigator(Kenkyū-buntansha) TSUTSUMI Mitsuyoshi  Ehime University, Department of Mechanical Engineering, Research Associate, 工学部, 助手 (70293925)
INOUE Tatsuo  Kyoto University, Department of Energy Conversion Science, Professor, エネルギー科学研究科, 教授 (10025950)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1998: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1997: ¥2,300,000 (Direct Cost: ¥2,300,000)
KeywordsWelding / Solidification / Numerical Analysis / Integral Penalty Method / Stefan Problem / Finite Element Method
Research Abstract

In order to describe the phase change in metals, particularly welding and solidification, the following investigations are carried out ; 1. Fundamental study of numerical analysis in free boundary problem, 2. Development of numerical code based on so-called "Integral Penalty Method, " and 3. Mechanical properties of phase boundary and heat affected zone in welding process in metals.
1. Fundamental study of numerical analysis in free boundary problem Regarding the welding and solidification processes as the Stefan problem, the governing equations are formulated in terms of spatial description as well as material description. The Stefan condition at the free surface boundary is replaced by the integral form by use of the integral penalty method, and so this method is advantageous for real utilization in numerical analysis.
2. Development of numerical code based on the integral penalty method A finite element code for predicting the Stefan problem is developed with reference to the integral … More penalty method. Numerical studies are carried out to clarify the stability condition between the penalty number, the spatial step, and the time increment. A two-phase/two-dimensional problem is also calculated to demonstrate the applicability of the proposed method.
3. Mechanical properties of phase boundary and heat affected zone A one point weld processing is performed on a circular plate of SUs304 stainless steel, and the temperature history is evaluated through the process. Both the hardness and the microstructure change remarkably at the phase boundary, particularly at the heat affected zone where the temperature comes across the AC1 transformation point, and so the phase boundary can be identified from these tests. A welding process is performed for an aluminum plate, from which a small size specimen is prepared for a tension test. Microgrid indentation is used to measure the local deformation over the weld. The strain distribution is calculated from the displacement of the movement of the grids. Less

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] Shoji IMATANI: "Experiment and Simulation for Thick-plate Bending by High Frequency Inductor" Proceedings of 3rd Sino-Japan Bilateral Symposium on High Temperature Strength of Materials. 120-125 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shoji IMATANI: "Finite Element Analysis of Stefan Problem Based on Integral Penalty Approach" Proceedings of 32nd Solid Mechanics Conference. 423-424 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shoji IMATANI: "Stress Analysis of Quenching Process Following Draw Forming" Proceedings of Euromech 385 Colloquium on Inelastic Analysis of Structures under Varying Loads. 161-163 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shoji IMATANI: "EXPERIMENT AND SIMULATION FOR THICK-PLATE BENDING BY HIGH FREQUENCY INDUCTOR" Proceedings of 3rd Sino-Japanese Bilateral Symposium on High Temperature Strenght of Materials. 120-125 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shoji IMATANI: "FINITE ELEMENT ANALYSIS OF STAFAN PROBLEM BASED ON INTEGRAL PENALTY APPROACH" Proceedings of 32nd Solid Mechanics Conference. 423-424 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shoji IMATANI: "STRESS ANALYSIS OF QUENCHING PROCESS FOLLOWING DRAW FORMING" Proceedings of Euromech 385 Colloquium on Inelastic Analysis of Structures under Varying Loads. 161-163 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shoji IMATANI: "Experiment and Simulation for Thick-plate Bending by High Frequency Inductor" Proceedings of 3rd Sino-Japan Bilateral Symposium on High Temperature Strength of Materials. 120-125 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Shoji IMATANI: "Finite Element Analysis of Stefan Problem Based on Integral Penalty Approach" Proceedings of 32nd Solid Mechanics Conference. 432-424 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Shoji IMATANI: "Stress Analysis of Quenching Process Following Draw Forming" Proceedings of Euromech 385 Colloquium on Inelastic Analysis of Structures under Varying Loads. 161-163 (1998)

    • Related Report
      1998 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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