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A study on prediction method for low cycle fatigue strength of steel welded members

Research Project

Project/Area Number 16360229
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural engineering/Earthquake engineering/Maintenance management engineering
Research InstitutionNagoya University

Principal Investigator

TATEISHI Kazuo  Nagoya University, EcoTopia Science Institute, Professor, エコトピア科学研究所, 教授 (80227107)

Co-Investigator(Kenkyū-buntansha) YAMADA Kentaro  Nagoya University, Graduate School of Environmental Studies, Professor, 大学院・環境学研究科, 教授 (50109310)
Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥12,200,000 (Direct Cost: ¥12,200,000)
Fiscal Year 2005: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2004: ¥9,600,000 (Direct Cost: ¥9,600,000)
KeywordsLow cycle fatigue strength / Image technique / Welded joints / Heat affected zone / Damage mechanics / Local strain / TIG dressing / 低サイクル疲労 / 溶接継手 / 鋼製橋脚 / 熱影響部 / 変動ひずみ
Research Abstract

A new low cycle fatigue testing system has been developed, in which strains of the specimen are measured by image technique. The low cycle fatigue tests of steel plain material and welded portion under constant and variable strain amplitude, particularly the fatigue life less than ten cycles, was conducted by using the newly developed testing system. The test results indicated that the fatigue life of welded portion, such as deposit metal and heat affected zone (HAZ), was much shorter than that of plain material. Particularly, HAZ was the weakest spot, of which fatigue life was about 30% of the plain material. And fatigue strength curves for the plain material, the deposited metal and the HAZ were proposed, individually.
As an estimation method of low cycle fatigue strength of "welded joint", peak strain based fatigue assessment method was verified. T-shape welded joints were employed for the verification test. The specimen was analyzed by elasto-plastic finite element method in order to quantify the local strain field around welded portion and the peak strain at the cracked point. On the other hand, fatigue life of the specimen was experimentally obtained by low cycle fatigue tests. The relationship between the peak strain and the fatigue life was consistent with the fatigue strength curve for the deposited metal. Consequently, it was demonstrated that the fatigue assessment method by peak strain approach was available even in low cycle fatigue region. And the improvement of fatigue strength of welded joints by TIG dressing was investigated. T-shape welded joint specimens of which weld toes were finished by TIG dressing were tested. The fatigue test results were compared with that of as-welded specimens tested in the same conditions. The test results indicated that TIG dressing could substantially increase the low cycle fatigue strength of welded joints.

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (28 results)

All 2006 2005 2004 Other

All Journal Article (28 results)

  • [Journal Article] 局部的なひずみを基準とした溶接継手の極低サイクル疲労強度評価2006

    • Author(s)
      判治剛, 舘石和雄, 南邦明, 鬼頭和也
    • Journal Title

      土木学会論文集 No.808/I-74

      Pages: 137-145

    • NAID

      10016730221

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Extremely low cycle fatigue assessment for welded joints based on peak strain approach2006

    • Author(s)
      T.Hanji, K.Tateishi, K.Minami, K.Kitoh
    • Journal Title

      Journal of Structural Mechanics and Earthquake Engineering, JSCE No.808/I-74

      Pages: 137-145

    • NAID

      10016730221

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Extremely low cycle fatigue assessment method for welded joint by peak strain approach2005

    • Author(s)
      T.HANJI, K.TATEISHI, K.KITOH
    • Journal Title

      Proceedings of 6th Japanese-German Bridge Symposium

      Pages: 1-6

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Improvement of extremely low cycle fatigue strength of welded joints by TIG dressing2005

    • Author(s)
      K.TATEISHI, T.HANJI, K.KITOH
    • Journal Title

      Proceedings of 6th Japanese-German Bridge Symposium

      Pages: 1-5

    • NAID

      130004301318

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A prediction model for extremely low cycle fatigue life under variable strain amplitude2005

    • Author(s)
      K.TATEISHI, T.HANJI
    • Journal Title

      Proceedings of the 8th Japan-Korea Joint Seminar on Steel Bridges

      Pages: 1-7

    • NAID

      10013551526

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Low cycle fatigue testing system by means of image technique and its application to steel welded joints2005

    • Author(s)
      T.HANJI, K.TATEISHI
    • Journal Title

      Proceedings of the 1st International Conference on Advances in Experimental Structural Engineering Vol.2

      Pages: 603-609

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] 溶接部を対象とした極低サイクル疲労強度予測モデル2005

    • Author(s)
      舘石和雄, 判治剛, 鬼頭和也, 南邦明
    • Journal Title

      構造工学論文集 Vol.51A

      Pages: 1275-1282

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary 2004 Annual Research Report
  • [Journal Article] Extremely low cycle fatigue assessment method for welded joint by peak strain approach2005

    • Author(s)
      T.Hanji, K.Tateishi, K.Kitoh
    • Journal Title

      Proceedings of 6th Japanese-German Bridge Symposium

      Pages: 1-6

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Improvement of extremely low cycle fatigue strength of welded joints by TIG dressing2005

    • Author(s)
      K.Tateishi, T.Hanji, K.Kitoh
    • Journal Title

      Proceedings of 6th Japanese-German Bridge Symposium

      Pages: 1-5

    • NAID

      130004301318

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A prediction model for extremely low cycle fatigue life under variable strain amplitude2005

    • Author(s)
      K.Tateishi, T.Hanji
    • Journal Title

      Proceedings of the 8th Japan-Korea Joint Seminar on Steel Bridges

      Pages: 1-7

    • NAID

      10013551526

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Low cycle fatigue testing system by means of image technique and its application to steel welded joints2005

    • Author(s)
      T.Hanji, K.Tateishi
    • Journal Title

      Proceedings of the 1st International Conference on Advances in Experimental Structural Engineering Vol.2

      Pages: 603-609

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A prediction model for extremely low cycle fatigue strength of welded materials2005

    • Author(s)
      K.Tateishi, T.Hanji, K.Kitoh, K.Minami
    • Journal Title

      Journal of Structural Engineering, JSCE Vol.51A

      Pages: 1275-1282

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Improvement of extremely low cycle fatigue strength of welded joint by TIG dressing2005

    • Author(s)
      K.TATEISHI, T.HANJI, K.KITOH
    • Journal Title

      Proceedings of 6th Japanese-German Bridge Symposium

      Pages: 1-5

    • NAID

      130004301318

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 極低サイクル疲労領域における変動振幅ひずみ下の低サイクル疲労寿命予測モデル2004

    • Author(s)
      舘石和雄, 判治剛, 南邦明
    • Journal Title

      土木学会論文集 No.773/I-69

      Pages: 149-158

    • NAID

      10013551526

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Low cycle fatigue strength of welded joints in extreme large strain field2004

    • Author(s)
      K.TATEISHI, T.HANJI
    • Journal Title

      Proceedings of the 2nd International Conference on Bridge Maintenance, Safety, Management and Cost Vol.1

      Pages: 1-6

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Low cycle fatigue strength of steel in extreme large strain field2004

    • Author(s)
      K.TATEISHI, T.HANJI
    • Journal Title

      Proceedings of the 3rd International Conference on Earthquake Engineering Vol.1

      Pages: 561-565

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Low cycle fatigue strength of butt-welded steel joint by means of new testing system with image technique2004

    • Author(s)
      K.TATEISHI, T.HANJI
    • Journal Title

      International Journal of Fatigue Vol.26

      Pages: 1349-1356

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A prediction model for extremely low cycle fatigue life under variable strain amplitude2004

    • Author(s)
      K.Tateishi, T.Hanji, K.Minami
    • Journal Title

      Journal of Structural Mechanics and Earthquake Engineering, JSCE No.733/I-69

      Pages: 149-158

    • NAID

      10013551526

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Low cycle fatigue strength of welded joints in extreme large strain field2004

    • Author(s)
      K.Tateishi, T.Hanji
    • Journal Title

      Proceedings of the 2nd International Conference on Bridge Maintenance, Safety, Management and Cost, Vol.1

      Pages: 1-6

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Low cycle fatigue strength of steel in extreme large strain field2004

    • Author(s)
      K.Tateishi, T.Hanji
    • Journal Title

      Proceedings of the 3rd International Conference on Earthquake Engineering Vol.1

      Pages: 561-565

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Low cycle fatigue strength of butt-welded steel joint by means of new testing system with image technique2004

    • Author(s)
      K.Tateishi, T.Hanji
    • Journal Title

      International Journal of Fatigue Vol.26

      Pages: 1349-1356

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Low cycle fatigue strength of butt welded steel joint by means of new testing system with image technique2004

    • Author(s)
      Tateishi, K., Hanji, T
    • Journal Title

      International Journal of Fatigue Vol.26

      Pages: 1349-1356

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 大ひずみ領域における変動振幅ひずみ下の低サイクル疲労寿命予測モデル2004

    • Author(s)
      舘石和雄, 判治剛, 南邦明
    • Journal Title

      土木学会論文集 No.773/I-69

      Pages: 149-158

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Low Cycle Fatigue Strength of Steel in Extreme Large Strain Field2004

    • Author(s)
      Tateishi, K., Hanji, T.
    • Journal Title

      The Third International Conference on Earthquake Engineering

      Pages: 561-565

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Low Cycle Fatigue Strength of Welded Joints in Extreme Large Strain Field2004

    • Author(s)
      Tateishi, K., Hanji, T.
    • Journal Title

      The 2nd International Conference on Bridge Maintenance, Safety, Management and Cost (CD-ROM)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] TIG処理による溶接継手の極低サイクル疲労強度の向上効果

    • Author(s)
      判治剛, 舘石和雄, 鬼頭和也, 南邦明
    • Journal Title

      鋼構造論文集 (掲載予定)

    • NAID

      130004301318

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Improvement of extremely low cycle fatigue strength of welded joints by TIG dressing

    • Author(s)
      T.Hanji, K.Tateishi, K.Kitoh, K.Minami
    • Journal Title

      Steel Construction Engineering, JSCE (in printing)

    • NAID

      130004301318

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] TIG処理による溶接継手の極低サイクル疲労強度の向上効果

    • Author(s)
      判治剛, 舘石和雄, 鬼頭和也, 南邦明
    • Journal Title

      鋼構造論文集 (掲載予定)

    • NAID

      130004301318

    • Related Report
      2005 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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