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Research on Correlation between Charpy Impact Test and Fracture of Steel Members

Research Project

Project/Area Number 10450201
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Building structures/materials
Research InstitutionThe University of Tokyo

Principal Investigator

KUWAMURA Hitoshi  The Univ. of Tokyo, Graduate School of Eng., Professor, 大学院・工学系研究科, 教授 (20234635)

Co-Investigator(Kenkyū-buntansha) INABA Yuichiro  The Univ. of Tokyo, Graduate School of Eng., Research Associate, 大学院・工学系研究科, 助手 (90312975)
伊山 潤  東京大学, 工学部附属総合試験所, 助手 (30282495)
Project Period (FY) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥14,900,000 (Direct Cost: ¥14,900,000)
Fiscal Year 1999: ¥5,800,000 (Direct Cost: ¥5,800,000)
Fiscal Year 1998: ¥9,100,000 (Direct Cost: ¥9,100,000)
KeywordsSteel Structure / Material Test / Fracture / Impact / 鋼材 / 衝撃試験 / 鉄骨造建築物 / 破面解析
Research Abstract

Since the Charpy impact test was invented a hundred years ago, the test method has been utilized in steel industry all over the world. The test results, however, have never been related quantitatively to fracture performance of structural members of actual size. Fracture mechanics has shown a negative opinion to the correlation between Charpy and structures because of the substantial differences in size, loading rate and notch configuration.
This research, however, prevailed that there is a remarkable correlation of pattern and process of fracture between Charpy specimens and structural members. They have a common fracture mechanism, i.e., a sequence of ductile crack initiation, its growth, and transition to cleavage fracture. Furthermore, the load-deformation curves obtained from Charpy test under variable loading rates, when compiled together with FEM analysis, demonstrated the development of plastic stress and strain at the origin of fracture, from which the conditions of crack initiation and brittle transition can be expressed by a common formula both for Charpy specimens and structural members with necessary conversions. Thus, the energy absorption capacity gained from Charpy impact test is expected to be directly applied for estimating the plastic strength and deformation capacity of structural members in design of steel structures.

Report

(3 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 桑村仁、伊山潤: "シャルピー衝撃試験片と実丈破壊部材の破面相関"日本建築学会構造系論文集. 508. 127-133 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kuwamura, Hitoshi: "Fracture of Steel during an Earthquake"J. of Earthquake, Wind and Ocean Engineering. 20. 310-322 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 桑村仁、稲葉雄一郎: "鉄骨接合部の平面ひずみ状態における応力三軸度とひずみ集中率"日本建築学会構造系論文集. 518. 87-94 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kuwamura, Hitoshi and Iyama, Jun: "Fractographic Correlation between Charpy Specimens and Full-Scale Members"J. of Constr. Eng., AIJ.. No. 508. 127-133 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kuwamura, Hitoshi: "Fracture of Steel during an Earthquake"J. of Earthq. Wind and Ocean Eng.. 20. 310-322 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kuwamura, Hitoshi and Inaba, Yuichiro: "Stress Triaxiality and Strain Concentration at Steel Connections under Plane Strain Condition"J. of Constr. Eng., AIJ.. No. 518. 87-94 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 桑村仁、伊山潤: "シャルピー衝撃試験片と実大破壊部材の破面相関"日本建築学会構造系論文集. 508. 127-133 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kuwamura,Hitoshi: "Fracture of steel during an Earhquake"J.of Earthquake,Wind and Ocean Engineering. 20・4. 310-322 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] 桑村仁、稲葉雄一郎: "鉄骨接合部の平面ひずみ状態における応力三軸度とひずみ集中率"日本建築学会構造系論文集. 518. 87-94 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 桑村仁・伊山潤: "シャルピー衝撃試験片と実大破壊部材の破面相関" 日本建築学会構造系論文集. 508. 127-133 (1998)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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