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The Crack Detection Using Dynamic X-ray Stress Measurement during Fatigue Test

Research Project

Project/Area Number 11650103
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

OHYA Shin-ichi  Musashi Institute of Technology Faculty of Engineering, Professor, 工学部, 教授 (80120864)

Co-Investigator(Kenkyū-buntansha) SUGIYAMA Yoshihiro  Musashi Institute of Technology Faculty of Engineering, Professor, 工学部, 教授 (60061511)
HAGIWARA Yoshihiko  Musashi Institute of Technology Faculty of Engineering, Professor, 工学部, 教授 (70061546)
Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2001: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 2000: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1999: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsX-ray stress measurement / Single exposure technique / Detection of fatigue crack / Actual stress distribution / Surface crack / Internal crack / Residual stress distribution / 疲労強度 / 片持ち回転曲げ疲労試験 / ショットピーニング処理 / 圧縮残留応力
Research Abstract

The purpose of this investigation is to detect both a surface and an internal fatigue cracks from actual stress distribution in the surface of specimen by using X-ray diffraction technique during fatigue test.
In 1999, an apparatus to measure actual stress distribution along circumference of specimen was fabricated by use of a cantilever type rotary bending fatigue machine and a stress analyzer based on single exposure technique with two position sensitive proportional counters. The method to collect separately the diffraction profile at each position along circumference of specimen was developed. Actual stress distributions at the maximum tensile applied stress were measured using an annealed carbon steel S45C specimen during fatigue test.
As a result in 1999, the shape of actual stress distribution was keeping stable with increasing number of stress cycles until surface crack initiation. After surface crack initiation, the actual stress at the position of surface crack initiation was d … More ecreased suddenly near 0 MPa, and the distribution was shaped "V" type. The "V" type distribution was appeared when crack length reached greater in size than a width of irradiation area.
In 2000, the actual stress distributions on shot-peened S45C specimen were measured during fatigue tests to clarify the behavior of compressive surface residual stress through fatigue process. As a result in 2000, the actual stress at every position on specimen circumference was roughly the same value as the algebraic sum of the compressive residual stress and the maximum tensile applied stress until surface crack initiation. However, after a macro surface crack was appeared, the actual stress distribution was showed V-shape at crack position. The actual stress at the bottom of V-shaped distribution was the same value as the compressive residual stress.
In 2001, the actual stress distributions on shot-peened ductile cast iron FCD600 specimens were measured during fatigue tests to clarify a possibility of the internal fatigue crack detection using change in surface actual stresses distribution. As a result in 2001, it was confirmed that the peak position in the actual stress distribution agreed with the internal crack position.
The method proposed in this investigation is useful for detecting a position of both a surface and an internal cracks. On the other hand, the residual stress distributions showed no significant change even where the internal crack and the surface cracks existed, whereby the crack could not be detected by change in the residual stress distribution. Less

Report

(4 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] 大谷眞一, 長濱利岳, 小島玲子, 萩原芳彦: "回転曲げ疲労試験中におけるX線を用いた実応力分布測定"日本材料学会「材料」. 48・7. 711-716 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Ohya, R.Kojima, Y.Hagiwara: "CHANGE OF STRESS DISTRIBUTION IN THE SURFACE OF SHOT PEENED STEEL DURING FATIGUE PROCESS"Proceedings of the Sixth Int. Conf. on Residual Stresses(ICRS6). 2. 905-912 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 大谷眞一, 小島玲子, 萩原芳彦: "ショットピーニング処理材の疲労過程における実応力分布の変化"日本材料学会「材料」. 49・7. 754-759 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.OHYA, T.NAGAHAMA, R.KOJIMA, Y.HAGIWARA: "Measurement for Actual Stress Distribution by Using X-Ray Diffraction during Rotary Bending Fatigue Test"MATERIAL SCIENCE RESEARCH INTERNATIONAL. 6,4. 263-268 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Shin-ichi OHYA: "X-Ray Stress Measurement during Rotary Bending Fatigue Test"MATERIAL SCIENCE RESEARCH INTERNATIONAL. STP-1. 332-335 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 大谷眞一, 秋本靖史, 大村依子, 萩原芳彦: "X線応力測定法を用いた内部疲労き裂の検出法"日本材料学会「材料」. 51・(掲載決定). (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Shin-ichi OHYA, Toshitaka NAGAHAMA, Reiko KOJIMA and Yoshihiko HAGIWARA: "In-Situ Measurement for Actual Stress Distribution by Using X-ray Diffraction during Rotary Bending Fatigue Test"Journal of The Soc. of Material Science, Japan. Vol.48, No.7. 711-716 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S. Ohya, R. Kojima and Y. Hagiwara: "CHANGE OF STRESS DISTRIBUTION IN THE SURFACE OF SHOT PEENED STEEL DURING FATIGUE PROCESS"Proceedings of the Sixth Int. Conf. on Residual Stresses. Vol.2. 905-912 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Shin-ichi OHYA, Reiko KOJIMA and Yoshihiko HAGIWARA: "Change of Actual Stress Distribution in Shot Peened Steel during Fatigue Process"Journal of The Soc. of Material Science, Japan. Vol.49, No.7. 754-759 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Shin-ichi OHYA, Toshitaka NAGAHAMA, Reiko KOJIMA and Yoshihiko HAGIWARA: "Measurement for Actual Stress Distribution by Using X-Ray Diffraction during Rotary Bending Fatigue Test"MATERIAL SCIENCE RESEARCH INTERNATIONAL. Vol.6, No.4. 263-268 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Shin-ichi OHYA: "X-Ray Stress Measurement during Rotary Bending Fatigue Test"MATERIAL SCIENCE RESEARCH INTERNATIONAL, Special Technical Publication -1. 332-335 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Shin-ichi OHYA Yasufumi AKIMOTO, Yoriko OHMURA and Yoshihiko HAGIWARA: "The Detection of Internal Fatigue Crack Usng X-Ray Stress Measurement"Journal of The Soc. of Material Science, Japan. Vol.51 (to be published.). (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Shin-ichi OHYA: "X-Ray Stress Measurement during Rotary Bending Fatigue Test"MATERIAL SCIENCE RESEARCH INTERNATIONAL. STP・1. 332-335 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 大谷 眞一, 秋本 靖史, 大村 依子, 萩原 芳彦: "X線応力測定法を用いた内部疲労き裂の検出法"日本材料学会誌「材料」. 51(掲載予定). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] 大谷眞一,小島玲子,萩原芳彦: "ショットピーニング処理材の疲労過程における実応力分布の変化"日本材料学会「材料」. 49・7. 754-759 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.OHYA,T.NAGAHAMA,R.KOJIMA and Y.HAGIWARA: "Measurement for Actual Stress Distribution by Using X-Ray Diffraction during Rotary Bending Fatigue Test"MATERIAL SCIENCE RESEARCH INTERNATIONAL. Vol.6,No.4. 263-268 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 大谷眞一、長濱利岳、小島玲子、萩原芳彦: "回転曲げ疲労試験中におけるX線を用いた実応力分布測定"日本材料学会「材料」. 48・7. 711-716 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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