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In Situ Stress Analysis under Dynamic State by Using X-ray Diffraction

Research Project

Project/Area Number 06650118
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Materials/Mechanics of materials
Research InstitutionMUSASHI INSTITUTE OF TECHNOLOGY

Principal Investigator

OHYA Shin-ichi  Musashi Institute of Technology, Associate Professor., 工学部, 助教授 (80120864)

Co-Investigator(Kenkyū-buntansha) MOCHIKI Kohichi  Musashi Institute of Technology, Associate Professor, 工学部, 助教授 (80107549)
YOSHIOKA Yasuo  Musashi Institute of Technology, Professor, 工学部, 教授 (40061501)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1995: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1994: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsX-ray stress analysis / Dynamic measurement / Single exposure technique / Fatigue strength / X線イメージセンサ
Research Abstract

The X-ray stress analysis is the method calculates the stress from strain of interplanner spacing, and the value is the actual stress. However, recently most of the X-ray stress analysis apply sin^2psi method which requires plural incident angles to get diffraction angle in each measurement. Therefore it is the real situation that the measurement under dynamic stress circumstances has not been carried out yet. This research is purposed on the realization of the actual stress observation under dynamic condition, it is planned to dissolve the problems by using the combination of "Single Exposure Technique", the one of the method for X-ray stress analysis, and "Position Sensitive Proportional Counter". SET is the method to measure two different diffraction angles in each psi angle from one incident X-ray beam, and to calculate the stress ; which is the most suitable to measure the actual stress under dynamic condition. Provided that it is necessary to count two diffraction profiles at onc … More e ; that causes necessity to develop the attachment and the system to connect two detectors. Originally, we planned to use an X-ray linear image sensor and also we developed the versatile X-ray diffractometer to attach various kinds of detectors and investigated the characteristics of each detector. Finally, it was too difficult to count with two linear image sensors, therefore we applied PSPC connected in series to dissolve the problem.
Secondary, for the purpose to materialize the dynamic X-ray stress analysis, we planed X-ray stress measurement under rotational fatigue condition. At first, we developed X-ray stress analyzer utilizes SET method and succeeded to observe the actual stress change following to fatigue repetition increase by using cantilever-type rotational fatigue apparatus with loading gauge. It was made out newly that the actual stress before crack opening decreases with no relation to the stress amplitude, and after crack opening it decreases and breaks because of the stress releasing on the cracked surface. The result of our experience suggests to magnify the new applicable field for the X-ray stress analysis and contributes much to the next research work of material science. Less

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] 大谷眞一: "汎用X線応用測定装置の開発とその測定例" 日本材料学会 X線材料強度に関するシンポジウム講演論文集. 31. 10-13 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 大谷眞一: "疲労過程における負荷応力のX線による測定" 日本材料学会 X線材料強度に関するシンポジウム講演論文集. 31. 141-145 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 西畑浩憲: "回転曲げ疲労試験中のX線応力測定" 日本非破壊検査協会 応力・ひずみ測定シンポジウム講演論文集. 27. 37-42 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Ohya, S.Ohata and S.Maeno: "The Development of X-ray Stress Analyzer for Multiple Use and It's Application" Proceedings of Symposium on X-ray studies on Mechanical Behavior of Materials. 31. 10-13 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Ohya, S.Hoshino, Y.Yoshioka and H.Nishihata: "X-ray Stress Analysis during Fatigue Process" Proceedings of Symposium on X-ray studies on Mechanical Behavior of Materials. 31. 141-145 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Nishihata, S.Ohya, S.Hoshino, and Y.Yoshioka: "X-ray Stress Analysis during Rotational Fatigue Test" Proceedings of Symposium on Stress and Strain Measurement. 27. 37-42 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 大谷眞一: "汎用X線応力測定装置の開発とその測定例" 日本材料学会 X線材料強度に関するシンポジウム講演論文集. 31. 10-13 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 大谷眞一: "疲労過程における負荷応力のX線による測定" 日本材料学会 X線材料強度に関するシンポジウム講演論文集. 31. 141-145 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 西畑浩憲: "回転曲げ疲労試験中のX線応力測定" 日本非破壊検査協会 応力・ひずみ測定シンポジウム講演論文集. 27. 37-42 (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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