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Development of Computer-aided nondestructive Evaluation Method of Welding Residual Stresses for Life Extension of Large Plants

Research Project

Project/Area Number 11305012
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Materials/Mechanics of materials
Research InstitutionTOKYO INSTITUTE OF TECHNOLOGY

Principal Investigator

KOBAYASHI Hideo  Tokyo Institute of Technology, Graduate School of Science and Engineering, Professor, 大学院・理工学研究科, 教授 (00016487)

Co-Investigator(Kenkyū-buntansha) NAKAMURA Haruo  Tokyo Institute of Technology, Graduate School of Information Science and Engineering, Professor, 大学院・情報理工学研究科, 教授 (40134829)
島村 佳伸  東京工業大学, 大学院・理工学研究科, 助手 (80272673)
轟 章  東京工業大学, 大学院・理工学研究科, 助教授 (50211397)
Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥23,550,000 (Direct Cost: ¥22,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2001: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2000: ¥11,400,000 (Direct Cost: ¥11,400,000)
Fiscal Year 1999: ¥7,600,000 (Direct Cost: ¥7,600,000)
KeywordsBead Flush Method / Eigen-Strain / Welding Residual Stresses / Reinforcement of Weld / Inverse Analysis / Life Extension / 適切化法 / 残留応力 / 溶接 / 非破壊評価
Research Abstract

Along and near the bead line of welded structures, there remain eigen-strains, such as thermal strain, plastic strain, and transformation strain. These produce welding residual stresses which have a significant effect on integrity of structures. For the life extension of those components, residual stresses must be evaluated nondestructively. In this study, a computer-aided nondestructive evaluation method was proposed. There, eigen-strain distributions are calculated by the inverse analysis from released elastic strains due to removal of reinforcement of the weld. Then residual stresses are evaluated by the commercial finite element code by imposing eigen-strains as initial strains.
Firstly, a basic formulation was attempted for a thin welded plate. Its utility was confirmed by conduction computer simulations as well as experiments. Especially in experiments, results from proposed method were compared with those by the X-ray method, the hole drilling method and the sectioning method. It was shown that all the results obtained agreed very well.
Then attempt was made to extend this method to thick welded plates as well as thin welded pipes. Simulations showed that proposed method may have utility for those problems.

Report

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

    (20 results)

All Other

All Publications (20 results)

  • [Publications] 熊谷克彦: "余盛り除去法による3次元溶接残留応力の非破壊評価(推定精度向上に関する実験的検討)"日本機械学会平成11年度材料力学部門講演会論文集. 99-16. 107-108 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 熊谷克彦: "余盛り除去法による溶接残留応力の非破壊評価"溶接構造シンポジウム'99講演論文集. 271-274 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 中村 春夫: "ビードフラッシュ法の溶接配管への適用に関する基礎研究"日本機械学会2001年度年次大会講演論文集. 01-1(I). 403-404 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 中村 春夫: "ビードフラッシュ法の溶接配管への適用(基礎的定式化と有効性評価)"日本機械学会第14回計算力学講演会講演論文集. 01-10. 213-214 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Haruo Nakamura: "Application of The Bead Flush Method to Weldments to Evaluate Residual Stresses Nondestructively-Its Concept and Applicability-"The First Taiwan-Japan Workshop on Mechanical and Aerospace Engineering. 1. 249-263 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Katsuhiko KUMAGAI, Haruo NAKAMURA, Hideo KOBAYASHI: "Non-destructive Evaluation of 3-Dimensional Welding Residual Stresses by Removing Reinforcement of Weld"Pre-print of JSME Meeting in 1999. No. 99-16. 107-108 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Katsuhiko KUMAGAI, Haruo NAKAMURA, Hideo KOBAYASHI: "Non-destructive Evaluation Method of Welding Residual Stresses by Removing Reinforcement of Weld"Pre-print of Symposium on Welded Structures, The Japan Welding Society. 271-274 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Haruo NAKAMURA, Mio YAMAMOTO, Hideo KOBAYASHI: "Basic Research on Application of the Bead Flush Method to Welded Pipes"Pre-print of JSME Meeting in 2001. No.01-1 Vol.(I). 403-404 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Haruo NAKAMURA, Mio YAMAMOTO, Hideo KOBAYASHI: "On Application of the Bead Flush Method to Welded Pipes (On Basic Formulation and Its Utility)"Pre-print of JSME Meeting in 2001. No.01-10. 213-214 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Haruo NAKAMURA, Hyoungno LEE, Mio YAMAMOTO: "Application of The Bead Flush Method to Weldments to Evaluate Residual Stresses Nondestructively Its Concept and Applicability"The First Taiwan-Japan Workshop on Mechanical and Aerospace Engineering. Vol.1. 249-263 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Haruo Nakamura: "Application of the Bead Flash Method to Weldments to Evaluate Residual Stresses Nondestructively"Prcc.1st Tiwan-Japan Workshop on Mechanical and Aerospace Engineering. 1. 249-263 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 中村春夫: "ビードフラッシュ法の溶接配管への適用(基礎的定式化と有効性)"日本機械学会第14回計算力学講演会講演論文集. 01・10. 213-214 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 中村春夫: "ビードフラッシュ法の溶接配管への適用に関する基礎研究"日本機械学会2001年度年次大会講演論文集. 1. 403-404 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Kumagai Katsuhiko: "Computer Aided Nondestructive Evaluation Method of Welding Residual Stresses by Removing Reinforcement of Weld"ASTM STP. 1389. 128-142 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Lee Hyoungno: "Thermo-Elasto-Plastic Analysis of Welding Eigenstrain and Its Application to the Bead-Flush Method"Proc.of the 25th Symposium on Fatigue. 83-86 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Haruo Nakamura: "Development of the Read-Flush Method to Evaluate Welding Residual Stresses Non-destructively"Meso Mechanical Aspects of Material Behavior. 212-222 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 熊谷克彦: "余盛り除去法による3次元溶接残留応力の非破壊評価(突合わせ溶接平板による実験的検証)"日本機械学会1999年度次大会講演論文集. I. 189-190 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 熊谷克彦: "余盛り除去法による溶接残留応力の解析援用非破壊評価(適切化法の導入とひずみ変化測定位置の最適化)"日本機械学会論文集. A65・634. 1397-1404 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 熊谷克彦: "余盛り除去法による3次元溶接残留応力の非破壊評価(推定精度向上に関する実験的検討)"日本機械学会材料力学部講演会講演論文集. NO.99-16. 107-108 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 熊谷克彦: "余盛り除去法による溶接残留応力の非破壊評価"日本溶接学会溶接構造シンポジウム'99講演論文集. 271-274 (1999)

    • Related Report
      1999 Annual Research Report

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

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