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Fatigue Life Evaluation of Ultra High Strength Notched Member using New Digital Image Correlation Method

Research Project

Project/Area Number 18560092
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Materials/Mechanics of materials
Research InstitutionOsaka Institute of Technology

Principal Investigator

NIHSIKAWA Izuru  Osaka Institute of Technology, Faculty of Engineering, Professor (90189267)

Co-Investigator(Kenkyū-buntansha) WAKI Hiroyuki  Osaka Electro-Communication University, Faculty of Engineering, Associate professor (30324825)
UEDA Sei  Osaka Institute of Technology, Faculty of Engineering, Professor (10176589)
Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,540,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2006: ¥2,500,000 (Direct Cost: ¥2,500,000)
KeywordsDigital Correlation Method / Strain / Displacement / Notch / Fatigue Strength / Crack / Crack Closure / Notch Sensitivity
Research Abstract

A new digital image correlation (DIC) method for analyzing the fracture problem of notched member was developed. At first, the application of the fast Fourier transform method is primarily employed for reduction of the analysis time. Meanwhile, a misunderstanding on the identical point searching can be avoided by using a new DIC method with the FFT treatment. Furthermore, a successful technique for the strain singular field near the crack tip was newly developed for the application of a DIC method to crack problems.
On the other hand, the additional technique on measurement of multi-axial strains was also developed to measure the complex strain fields near the notch root. In this case, 3-dimensional measurement technique was needed to be applicable to monitor the transformation/strain at notch root. Multi-axial strains can be measured by using this developed system.
For researching the notch sensitivity of ultra high strength steels, two types of ultra high strength steels were used in this study. Conventional fatigue tests were conducted to obtain the data on the fatigue life (fatigue strength). These data were investigated through the Kikukawa theory on fatigue strength. It was found that these strength data on the ultra high strength steel were fitted on the master curve of the Kikukawa theory.

Report

(3 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • Research Products

    (22 results)

All 2008 2007 2006

All Journal Article (6 results) Presentation (16 results)

  • [Journal Article] レーザスペックルを用いた多成分変位および多成分ひずみの計測2007

    • Author(s)
      西川出, 大西将史, 浜田高宏
    • Journal Title

      日本機械学会講演論文集 No.074-1

      Pages: 8-11

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 中高温環境下におけるTi-6Al-4V合金の疲労き裂進展下限界挙動に及ぼす応力比および環境温度の影響2007

    • Author(s)
      西川 出, 藤花 剛
    • Journal Title

      日本機械学会講演論文集 No.074-1

      Pages: 8-20

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 炭素鋼の切欠底における疲労き裂発生ならびに進展挙動2007

    • Author(s)
      西川出, 田邊賢治
    • Journal Title

      日本機械学会講演論文集 No.074-1

      Pages: 8-14

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 曲面補間利用によるデジタル画像相関法の同定制精度向上に関する検討2006

    • Author(s)
      西川出, 阿部真哉
    • Journal Title

      日本実験力学講演論文集 6

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Ti-6Al-4V合金の高温化疲労き裂進展下限界挙動に及ぼす応力比の影響2006

    • Author(s)
      藤花 剛, 西川 出
    • Journal Title

      日本機械学会2006年度年次大会講演論文集 1

      Pages: 1019-1019

    • Related Report
      2006 Annual Research Report
  • [Journal Article] レーザスペックルによる変位・ひずみの多成分同時計測法に関する研究2006

    • Author(s)
      西川出, 畦地英司
    • Journal Title

      日本非破壊検査協会平成18年度春期大会講演概要集

    • Related Report
      2006 Annual Research Report
  • [Presentation] Simultaneous measurement of normal and shear strains using laser speckle method2008

    • Author(s)
      Masashi Oonishi, Izuru Nishikawa
    • Organizer
      Proc. of Japan Society of Mechanical Engineering
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Simultaneous measurement of multi-component of strain and displacement using laser speckle2008

    • Author(s)
      Masashi Oonishi, Izuru Nishikawa
    • Organizer
      Proc. of Japan Society of Non-Destructive Testing
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Development of multi-component strain/displacement measurement method using laser speckle2008

    • Author(s)
      Izuru Nishikawa, Masashi Oonishi
    • Organizer
      Proc. of Japan Society of Materials and Science
    • Place of Presentation
      to be appeared
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Precision measuring of fracture mechanics parameter of cracked members using digital image correlation method2008

    • Author(s)
      Yoshiteru Hainiwa Izuru Nishikawa
    • Organizer
      Proc. of Japan Society of Mechanical Engineering
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Estimation method of fracture mechanics parameter of the crack using digital image correlation method2008

    • Author(s)
      Yoshiteru Hainiwa Izuru Nishikawa
    • Organizer
      Proc. of Japan Society of Experimental Mechanics
    • Place of Presentation
      to be appeared
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 改良型デジタル画像相関法を用いたき裂状欠陥の力学パラメータ評価法に関する研究2007

    • Author(s)
      西川 出
    • Organizer
      日本非破壊検査協会秋期講演大会
    • Place of Presentation
      札幌
    • Year and Date
      2007-10-18
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
  • [Presentation] Fatigue crack initiation and propagation behavior of carbon steel at notch root2007

    • Author(s)
      Izuru Nishikawa, Tomoharu Tanabe
    • Organizer
      Proc. of Japan Society of Mechanical Engineering
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Multi component measurement of displacement and strain using Laser sueckle method.2007

    • Author(s)
      Masashi Oonishi, Takahiro Hamada, Izuru Nishikawa
    • Organizer
      Proc. of Japan Society of Mechanical Engineering
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Multi-component strain measurement techniques using Laser speckle under mixed-mode loading2007

    • Author(s)
      Masashi Oonishi, Izuru Nishikawa
    • Organizer
      Proc. of Japanese Non Destructive Inspection
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Mixed-mode displacement and strain measurement by Laser speckle2007

    • Author(s)
      Masashi Oonishi, Izuru Nishikawa
    • Organizer
      Proc. of Japan Society of Experimental Mechanics
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Development of precision measurement technique on the train files near crack tip using digital image correlation2007

    • Author(s)
      Yoshiteru Hainiwa Izuru Nishikawa
    • Organizer
      Proc. of Japan Society of Mechanical Engineering
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Development of digital image correlation method based on the strain field near crack tip2007

    • Author(s)
      Yoshiteru Hainiwa Izuru Nishikawa
    • Organizer
      Proc. of Japan Society of Materials Science
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Evaluation of stress intensity factor of crack using digital image correlation method2007

    • Author(s)
      Yoshiteru Hainiwa Izuru Nishikawa
    • Organizer
      Proc. of Japan Association Non-destructive Testing
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Application of digital image correlation method to monitor the crack tip deformation2007

    • Author(s)
      Yoshiteru Hainiwa Izuru Nishikawa
    • Organizer
      Proc. of Japan Society of Experimental Mechanics
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Fracture mechanics parameter estimation of crack using digital image correlation method2007

    • Author(s)
      Yoshiteru Hainiwa Izuru Nishikawa
    • Organizer
      Proc. of Japan Society of Non-destructive Inspection
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Improved evaluation of stress intensity factor of the crack using digital image correlation method2007

    • Author(s)
      Yoshiteru Hainiwa Izuru Nishikawa
    • Organizer
      Proc. of Japan Society of Non-destructive Inspection
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary

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Published: 2006-04-01   Modified: 2016-04-21  

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