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New Crack-Tip Stress Distribution Scaling and its Application to the Prediction of Fracture Toughness Temperature Dependence

Research Project

Project/Area Number 17K06050
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Materials/Mechanics of materials
Research InstitutionUniversity of Fukui

Principal Investigator

Meshii Toshiyuki  福井大学, 学術研究院工学系部門, 教授 (10313727)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords破壊靱性値 / 延性ー脆性遷移温度域 / 温度依存性 / 引張試験 / 降伏応力 / マスターカーヴ / 遷移温度域 / 応力分布スケーリング / 機械材料 / 材料力学 / 破壊 / き裂 / 破壊力学 / 破壊靱性値温度依存性 / 延性脆性遷移温度域 / 機械材料・材料力学
Outline of Final Research Achievements

Efficient collection of fracture toughness (Jc) is a key in structural integrity evaluation of cracked structures that experience large temperature change. This is because Jc shows approximately 1,400% change with 100℃ change.
This work focused on the fact “fracture stress for slip induced cleavage fracture is temperature independent,” and developed T-scaling method to scale crack-tip stress distribution at fracture between different temperatures.
Finally, T-scaling method was applied to predict Jc temperature dependence as Jc in proportion to (1/σ0) to the (n+1)th power, named as CDS method. Here, n and σ0 is a Ramberg-Osgood exponent and scaling stress, respectively. CDS method was validated for total of 34 cases - combination of material heats and specimen types - including 661 Jc data. Especially, CDS method successfully predicted Jc temperature dependence of Cr-Mo steel (JIS SCM440), which the ASTM E1921 master curve failed to.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果により,き裂部材の材料強さJcの値を広範囲の温度に対し,一温度のJcと降伏応力σ0から予測可能となった.今後インフラの経年劣化が進む中で,試験片に使用できる部材材料が限定される構造物がほとんどであり,本手法は劣化後のその場強度,特に温度依存性の把握を容易に可能とすることが期待される.
学術的意義は,Jcがき裂のない試験片で求められている引張強度(例えば,降伏応力σ0)の一表現である可能性が示唆されたことである.この知見についてはさらなる検討が必要であるが,この場合にはき裂部材,非き裂部材の強度データという仕分けが不要になり,き裂の力学である破壊力学に一石を投じる可能性を秘めている.

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (22 results)

All 2020 2019 2018 2017 Other

All Journal Article (7 results) (of which Peer Reviewed: 7 results,  Open Access: 6 results) Presentation (8 results) (of which Int'l Joint Research: 6 results) Remarks (7 results)

  • [Journal Article] Quantitative comparison of the predictions of fracture toughness temperature dependence using ASTM E1921 master curve and stress distribution T-scaling methods2020

    • Author(s)
      Meshii Toshiyuki、Yakushi Goh、Takagishi Yoichi、Fujimoto Yohei、Ishihara Kenichi
    • Journal Title

      Engineering Failure Analysis

      Volume: 111 Pages: 104458-104458

    • DOI

      10.1016/j.engfailanal.2020.104458

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Spreadsheet-based method for predicting temperature dependence of fracture toughness in ductile-to-brittle temperature region2019

    • Author(s)
      Meshii Toshiyuki
    • Journal Title

      Advances in Mechanical Engineering

      Volume: 11 Issue: 8 Pages: 1-17

    • DOI

      10.1177/1687814019870897

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Failure of the ASTM E 1921 master curve to characterize the fracture toughness temperature dependence of ferritic steel and successful application of the stress distribution T-scaling method2019

    • Author(s)
      Meshii Toshiyuki
    • Journal Title

      Theoretical and Applied Fracture Mechanics

      Volume: 100 Pages: 354-361

    • DOI

      10.1016/j.tafmec.2019.01.027

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Ferritic steel that ASTM E1921 master curve failed to characterize its fracture toughness temperature dependence2019

    • Author(s)
      飯井俊行
    • Journal Title

      Transactions of the JSME (in Japanese)

      Volume: 85 Issue: 873 Pages: 18-00431-18-00431

    • DOI

      10.1299/transjsme.18-00431

    • NAID

      130007653328

    • ISSN
      2187-9761
    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] T-scaling method for stress distribution scaling under small-scale yielding and its application to the prediction of fracture toughness temperature dependence2017

    • Author(s)
      Ishihara Kenichi、Hamada Takeshi、Meshii Toshiyuki
    • Journal Title

      Theoretical and Applied Fracture Mechanics

      Volume: 90 Pages: 182-192

    • DOI

      10.1016/j.tafmec.2017.04.008

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Prediction of fracture toughness by application of stress distribution T-scaling method under compressive residual stress2017

    • Author(s)
      ISHIHARA Kenichi、SHIMOIKE Toshinori、MESHII Toshiyuki
    • Journal Title

      Transactions of the JSME (in Japanese)

      Volume: 83 Issue: 855 Pages: 17-00323-17-00323

    • DOI

      10.1299/transjsme.17-00323

    • NAID

      130006219662

    • ISSN
      2187-9761
    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fracture Toughness Prediction under Compressive Residual Stress by Using a Stress-Distribution T-Scaling Method2017

    • Author(s)
      Meshii Toshiyuki、Ishihara Kenichi
    • Journal Title

      Metals

      Volume: 8 Issue: 1 Pages: 6-6

    • DOI

      10.3390/met8010006

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Comparison of ASTM E1921 master curve and stress distribution T-scaling method to predict fracture toughness temperature dependence in the ductile-to-brittle transition temperature region2019

    • Author(s)
      Meshii Toshiyuki
    • Organizer
      ICSID2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Application of the T-scaling method to predict fracture toughness under compressive residual stress in the transition temperature region2018

    • Author(s)
      Meshii, T. and Ishihara, K.
    • Organizer
      ASME 2018 Pressure Vessels and Piping Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Prediction of fracture toughness temperature dependence over a wide range using stress distribution scaling method2018

    • Author(s)
      Inoue, T. and Meshii, T.
    • Organizer
      ASME 2018 Pressure Vessels and Piping Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Application of T-scaling method to account for the effects of notch acuity on notch fracture toughness in the ductile-to-brittle transition temperature region2018

    • Author(s)
      Nakano, H. and Meshii, T.
    • Organizer
      ASME 2018 Pressure Vessels and Piping Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 延性―脆性遷移温度域材での破壊靭性値のき裂とノッチの連続性のTスケーリング法による説明2018

    • Author(s)
      中野浩樹,飯井俊行
    • Organizer
      日本機械学会北陸信越支部第55期総会・講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] SDS法による広範囲の温度に対する破壊靱性値予測の検証2018

    • Author(s)
      Inoue Takashi, Meshii Toshiyuki
    • Organizer
      日本機械学会北陸信越支部第55期総会・講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] Application of SDS method to predict fracture toughness temperature dependency of A533B steel2017

    • Author(s)
      Meshii Toshiyuki、Ishihara Kenichi, Nakano Hiroki
    • Organizer
      ASME 2017 Pressure Vessels and Piping Conference
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Prediction of the temperature dependence on fracture toughness by new stress distribution scaling method2017

    • Author(s)
      Ishihara Kenichi、Hamada Takeshi、Meshii Toshiyuki
    • Organizer
      ASME 2017 Pressure Vessels and Piping Conference
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Remarks] 福井大学研究者総覧

    • URL

      http://t-profile.ad.u-fukui.ac.jp/profile/ja.c48cca1436851576520e17560c007669.html

    • Related Report
      2018 Research-status Report
  • [Remarks] google scholar citation

    • URL

      https://scholar.google.co.jp/citations?user=HD-5QckAAAAJ&hl=ja

    • Related Report
      2018 Research-status Report
  • [Remarks] Web of Science, Researcher-id

    • URL

      https://publons.com/researcher/1483100/toshiyuki-meshii/

    • Related Report
      2018 Research-status Report
  • [Remarks] ORICD

    • URL

      https://orcid.org/0000-0001-5496-6087

    • Related Report
      2018 Research-status Report
  • [Remarks] Researchgate

    • URL

      https://www.researchgate.net/profile/Toshiyuki_Meshii

    • Related Report
      2018 Research-status Report
  • [Remarks]

    • URL

      http://ffg.mech.u-fukui.ac.jp/

    • Related Report
      2017 Research-status Report
  • [Remarks]

    • URL

      http://t-profile.ad.u-fukui.ac.jp/profile/ja.c48cca1436851576520e17560c007669.html

    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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