• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of Evaluation Method for Fatigue Damage in Metal Materials Using Laser Speckle

Research Project

Project/Area Number 12650099
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Materials/Mechanics of materials
Research InstitutionChubu University

Principal Investigator

KATO Akira  Chubu University, College of Engineering, Professor, 工学部, 教授 (00113085)

Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2001: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2000: ¥2,200,000 (Direct Cost: ¥2,200,000)
KeywordsOptical Measurement / Fatigue / Non-Destructive Testing / Fatigue Life Estimation / Image Processing / Steels
Research Abstract

In this study, a Method is investigated to detect change in surface properties of metal materials and to estimate fatigue life during fatigue loading using optical method. Results derived from this study are shown below.
(1)We investigated change of surface properties depending on increase of loading cycles under constant stress amplitude. We considered mathematical mean roughness and Fractal dimension and spatial frequency distribution of surface profiles as surface properties. Relation between these parameters and number of loading cycles were investigated. It was clarified that these surface parameters changes depending on number of loading cycles and there is a correspondence between surface properties and fatigue damage.
(2)Relation between width of laser speckle pattern and number of loading cycles was investigated. Among surface properties and width of speckle pattern, spatial frequency distribution is related the most to width of speckle pattern. Width of speckle pattern has the best correlation with number of loading cycles and it was concluded that width of the speckle pattern is the most appropriate as a parameter to evaluate fatigue damage.
(3)We developed an optical setup to observe speckle pattern formed by the reflected light when a He-Ne laser illuminates the object and observe speckle pattern on site during working of the testing machine.
(4)We derived an experimental equation, which expresses the relation between a parameter of the speckle pattern and number of loading cycles for different stress amplitudes. We also construct the database of relations between a parameter of the speckle pattern and stress amplitude and relation between change rate of the speckle pattern and fatigue life. We devised a method to estimate fatigue life during working object based on the experimental equation and the database. Fatigue life estimation was tried using this method and the result showed that this method has a possibility for practical use.

Report

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

    (16 results)

All Other

All Publications (16 results)

  • [Publications] Akira Kato, Mitsue Hayashi: "A New Method for Fatigue Life Estimation of Steels"Technology, Law and Insurance, The Journal of International Society for Technology, Law and Insurance. Vol.5,No.1/2. 9-14 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Akira Kato: "Detection of Fatigue Damage in Steels Using Laser Speckle"Optics and Lasers in Engineering. Vol.33,No.5. 323-333 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Akira Kato, Fumihiko Okuya: "Evaluation of fatigue damage using laser speckle(Relation between surface profile and diffraction pattern)"Proceedings of SPIE. Vol.4317. 374-379 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 加藤章, 伊藤隆: "レーザスペックルを用いた繰返しひずみの測定(拡散光の広がりの評価法の検討)"実験力学. Vol.1,No.2. 85-90 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Akira Kato, Mitsue Hayashi: "A New Method for Fatigue Life Estimation of Steels, Technology, Law and Insurance"The Journal of the International Society for Technology, Law and Insurance. Vol.5,No.1/2. 9-14 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Akira Kato: "Detection of Fatigue Damage in Steels Using Laser Speckle"Optics and Lasers in Engineering. Vol.33,No.5. 323-333 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Akira Kato, Tsuyoshi Yoshitomi, Yoshiomi Shibata: "Parallel Processing of Finete Element Method Using Domain Decomposition Method (On the Parameter Setting for Convergence of Boundary Conditions)"J.Japan Society for Design Engineering (in Japanese). Vol.35,No.11. 433-439 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Akira Kato, Fumihiko Okuya: "Evaluation of fatigue damage using laser speckle (Relation between surface profile and diffraction pattern)"Proceedings of SPIE. Vol.4317. 374-379 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Akira Kato, Takashi Ito: "Measurement of Cyclic Strain Using Laser Speckle (Study on Evaluation Method of Diffused Pattern)"J.Japanese Society for Experimental Mechanics. Vol.1,No.2. 85-90 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Akira Kato, Fumihiko Okuya: "Evaluation of fatigue damage using laser speckle(Relation between surface profile and diffraction pattern)"Proceedings of the International Congress on Experimental Mechanics, Singapore. 40-41 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Akira Kato, Hisanao Wate: "Measurement of Small Deformation Using Image Correlation"Proceedings of the 5^<th> French-Japanese Congress on Mechatronics. 275-280 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Akira Kato, Hisanao Wate: "Deformation Measurement Using Digital Image Correlation (Interpolation method for sub-pixel accuracy)"Proceedings of APCFS & ATEM 01. 840-845 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Akira Kato, Fumihiko Okuya: "Evaluation of fatigue damage using laser speckle(Relation between surface profile and diffraction pattern)"Proceedings of SPIE. 4317. 374-379 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 加藤章, 伊藤隆: "レーザスペックルを用いた繰返しひずみの測定(拡散光の広がりの評価法の検討)"実験力学. Vol.1,No.2. 85-90 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Akira Kato,Mitsue Hayashi: "A New Method for Fatigue Life Estimation of Steels"Technology, Law and Insurance, The Journal of the International Society for Technology, Law and Insurance. Vol.5,No.1/2,. 9-14 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Akira Kato: "Detection of Fatigue Damage in Steels Using Laser Speckle"Optics and Lasers in Engineering. Vol.33,No.5. 323-333 (2000)

    • Related Report
      2000 Annual Research Report

URL: 

Published: 2000-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi