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Development of Fatigue Life Estimation Method of Metal Materials Using Laser Speckle Sensors

Research Project

Project/Area Number 10650102
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) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1999: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1998: ¥1,700,000 (Direct Cost: ¥1,700,000)
KeywordsOptical Measurement / Fatigue / Non-Destructive Testing / Fatigue Life Estimation / Image Processing / Steels / 光学的試験法 / 疫労寿命評価 / 表面あらさ
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 developed an optical setup to observe speckle pattern formed by the reflected light when a He-Ne laser illuminates the object and also a system to input an image of the speckle pattern and analyze the image.
(2)When a steel specimen is loaded cyclically with a constant stress amplitude, it was clarified that speckle pattern changes with number of loading cycles. We derived a parameter to evaluate width of the speckle pattern
(3)We investigated change of surface roughness and frequency distribution of surface profiles depending on increase of loading cycles. It was clarified that there is a correspondence between width of speckle pattern, surface roughness and width of frequency distribution of surface profiles.
(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.
(5)We derived a method to estimate fatigue life using the experimental equation and comparison with the experimental data showed that estimation of fatigue life is possible at the early stage of fatigue, such as a quarter of fatigue life.
(6)We applied this method to low cycle fatigue. The result showed that speckle pattern broadens as fatigue damage proceeds similar to the case of high cycle fatigue and it was found that this method can be applied to low cycle fatigue.

Report

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

    (13 results)

All Other

All Publications (13 results)

  • [Publications] 加藤, 林, 伊藤: "レーザスペックルセンサーを用いた疲労寿命の予測"非破壊検査. 47. 838-845 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 加藤, 林, 林: "レーザスペックルを用いた低サイクル疲労における応力・ひずみの測定"非破壊検査. 48. 613-619 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] A.Kato, M.Hayashi: "Evaluation of Low Cycle Fatigue Damage Using Laser Speckle Sensor"Experimental Mechanics, Advances in design, testing and analysis, Edited by I.M. Allinson, Vol.II, A.A.Balkema. 1065-1069 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Akira Kato, Mitsue Hayashi: "Detection of Fatigue Damage in Metals Using Laser Speckle"Proceedings of 4i^<th> International Conference on Quality Control by Artificial Vision. 325-330 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Akira Kato, Mituse Hayashi, Koji Ito: "Fatigue Life Estimation Using Laser Speckle Sensors"Journal of the Japanese Society for Non-Destructive Inspection (in Japanese). 47-11. 838-845 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Akira Kato, Mitsue Hayashi: "Evaluation in Low Cycle Fatigue Using Laser Speckle"Proceedings of the Second Japan-US Symposium on Advances in NDT. 162-166 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Akira Kato, Mitsue Hayashi: "Damage Evaluation in Low Cycle Fatigue Using Laser Speckle"Proceedings of 1999 ASME Mechanics & Materials Conference. 183-184 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Akira Kato, Hiroki Okumura: "Measurement of Cyclic Strain Using Laser Speckle (Effect of Mean Stress)"Proceedings of the International Conference on Advanced Technology in Experimental Mechanics '99. 599-604 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Akira Kato, Mitsue Hayashi, Seijiro Hayashi: "Measurement of Stress and Strain in Low Cycle Fatigue Using Laser Speckle"Journal of the Japanese Society for Non-Destructive Inspection (in Japanese). 48-9. 613-619 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 加藤、林、伊藤: "レーザスペックルセンサーを用いた疲労寿命の予測"非破壊検査. 47・11. 838-845 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] 加藤、林、林: "レーザスペックルを用いた低サイクル疲労における応力・ひずみの測定"非破壊検査. 48・9. 613-619 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] A.Kato, M.Hayashi: "Evaluation of Low Cycle Faftgue Damage Using Laser Speckle Sensor" Experimental Mechanics, Advances in design , testing and analysis. Vol.II. 1065-1069 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 加藤,章, 林,充恵, 伊藤,孝治: "レーザスペックルセンサーを用いた疫労寿命の予測" 非破壊検査. 47・11. 838-845 (1998)

    • Related Report
      1998 Annual Research Report

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

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