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

Construction of the life damage evaluation system for health monitoring

Research Project

Project/Area Number 16560079
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

KENJI Machida  Tokyo University of Science, Mechanicheal engineering, Professor, 理工学部, 教授 (50089380)

Project Period (FY) 2004 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥4,000,000 (Direct Cost: ¥4,000,000)
Fiscal Year 2006: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 2005: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 2004: ¥3,200,000 (Direct Cost: ¥3,200,000)
KeywordsDigital image correlation technique / Hybrid method / Infrared thermography / Heat conduction analysis / Infrared hybrid method / 3-D local hybrid method / Stress intensity factor / J integral / インテリジェントハイブリッド法 / 応力解析
Research Abstract

1. Development of Displacement Measurement System by Digital Image Correlation Technique
(1) In the experiment using the specimen of SS400, the displacement analyses in 0.02 pixel or less of average errors with FEM were possible.
(2) The stress intensity factor was estimated by taking into consideration a high order deformation descending slope by less than 1% of the error with a three-dimensional finite element method.
(3) When taking even the secondary deformation gradient into consideration, the infinitesimal strain of about 0.02% was estimated by less than 10% of the error.
2. Analyses of a three-dimensional local hybrid method
The applicability of the three-dimensional local hybrid method in the structure with a surface crack subjected to a bending load was examined, and the following results were obtained.
(1) If a local model is enlarged simply, higher accuracy will not necessarily be acquired.
(2) A local model is not enlarged, but it is choosing suitable size and high accuracy can be … More acquired.
(3) If some optimum sizes of the local model are obtained, an approximation is built, and expecting optimum local model size can estimate a J integral value with sufficient accuracy, although the range is limited.
3. Analyses in Inverse Problem Heat-Conduction Analyses of Stress Field by Infrared Thermography
The following conclusions were obtained as a result of the investigation of the effect of thickness of a specimen and the frequency change at the time of an experiment on the heat conduction in the specimen.
(1) The error under the effect of heat conduction changes with setting out of the frequency at the time of measurement a lot. For highly precise analyses, it is necessary to use high frequencies, such as 20Hz and 25Hz.
(2) Even if it introduces the nonsteady-heat-conduction inverse analysis which eliminates the error of heat conduction, improvement in accuracy cannot be expected in the analyses by the thermoelastic stress measurement using a low frequency.
(3) About material with high heat conductivity (C1100), analytic accuracy falls with the increase in specimen thickness.
(4) In the thermoelastic stress measurement experiment in a high frequency, the error by the heat conduction of the direction of specimen thickness becomes so small that it can ignore. Less

Report

(4 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • Research Products

    (22 results)

All 2006 2005 2004

All Journal Article (21 results) Book (1 results)

  • [Journal Article] Evaluation of Mixed-mode Stress Intensity Factor by Digital Image Correlation and Intelligent Hybrid Method2006

    • Author(s)
      Machida, K., Yamada, H.
    • Journal Title

      Proc. 12th ICCS

      Pages: 29-34

    • NAID

      10016443267

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Evaluation of J integral of surface crack by three-dimensional local hybrid method2006

    • Author(s)
      Machida, K., Mizukami, G., Ohyama, H.
    • Journal Title

      Key Engineering Materials 321-323

      Pages: 28-31

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Examination of the accuracy of the singular stress field near a crack-tip by digital image correlation2006

    • Author(s)
      Machida, K., Suzuki, Y.
    • Journal Title

      Key Engineering Materials 321-323

      Pages: 32-37

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Evaluation of stress intensity factor by the infrared hybrid method in consideration of heat conduction2006

    • Author(s)
      Machida, K., Miyagawa, S.
    • Journal Title

      Key Engineering Materials 321-323

      Pages: 841-844

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Examination of the optimal local model size in the three-dimensional local hybrid method2006

    • Author(s)
      Machida, K., Ueno, T., Oyama, H.
    • Journal Title

      Key Engineering Materials 326-328

      Pages: 991-994

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Effect of the frequency of a cyclic load to the inverse analyses of heat conduction in infrared thermography2006

    • Author(s)
      Machida, K., Miyagawa, S.
    • Journal Title

      Key Engineering Materials 326-328

      Pages: 1137-1140

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Evaluation of Mixed-mode Stress Intensity Factor by Digital Image Correlation and Intelligent Hybrid Method2006

    • Author(s)
      Machida, K., Yamada, H.
    • Journal Title

      Key Engineering Materials 321-323

      Pages: 29-34

    • NAID

      10016443267

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Examination of the optimal local model size in the three-dimensional local hybrid method2006

    • Author(s)
      Machida, K., Ueno, T., Oyama, H.
    • Journal Title

      Key Engineering Materials 321-323

      Pages: 991-994

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Effect of the frequency of a cyclic load to the inverse analyses of heat conduction in infrared thermography2006

    • Author(s)
      Machida, K., Miyagawa, S.
    • Journal Title

      Key Engineering Materials 321-323

      Pages: 1137-1140

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Evaluation of Mixed-mode Stress Intensity Factor by Digital Image Correlation and Intelligent Hybrid Method2006

    • Author(s)
      Machida, K., Ymada, H.
    • Journal Title

      Proc. 12th ICCS

      Pages: 29-34

    • NAID

      10016443267

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Examination of the accuracy of the singular stress field near a crack-tip by digital image correlation2006

    • Author(s)
      Machika, K., Suzki, Y.
    • Journal Title

      Key Engineering Materials 321-323

      Pages: 32-37

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Effect of the frequency of a cyclic load to the inverse analyses heat conduction in infrared thermography2006

    • Author(s)
      Machida, K., Miyagawa, S.
    • Journal Title

      Key Engineering Materials 326-328

      Pages: 1137-1140

    • Related Report
      2006 Annual Research Report
  • [Journal Article] デジタル画像相関法とインテリジェントハイブリッド法による混合モード応力拡大係数の評価2005

    • Author(s)
      町田賢司, 山田英明
    • Journal Title

      実験力学 5・2

      Pages: 130-135

    • NAID

      10016443267

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 3次元局所ハイブリッド法による破壊力学パラメーターの評価2005

    • Author(s)
      町田賢司, 水上 学
    • Journal Title

      実験力学 5・2

      Pages: 144-149

    • NAID

      10016443290

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 3次元局所ハイブリッド法における変位測定領域サイズと誤差評価法の検討2005

    • Author(s)
      町田賢司, 水上 学
    • Journal Title

      日本機械学会論文集 71・709A

      Pages: 1220-1225

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Analysis of Interior Stress Field of the Specimen under Mixed-Mode Loading by Three-Dimensional Local Model Hybrid Method2005

    • Author(s)
      Machida, K.
    • Journal Title

      Proceedings of ICF11

      Pages: 6-6

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Elastic-Plastic Stress Analyses by Digital Image Correlation and Nonlinear Hybrid Method2005

    • Author(s)
      Machida, K.
    • Journal Title

      Applied Mechanics and Materials 3・4

      Pages: 39-44

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Influence of the radius of curvature of crack tip on the mixed mode stress intensity factor by infrared hybrid thermography2005

    • Author(s)
      Machida, K., Sato, M.
    • Journal Title

      Proceedings of SPIE, Third International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics 5852

      Pages: 806-812

    • NAID

      10014193419

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Automatic Stress Analyzing System by Digital Speckle Photography using 2-D Hybrid Method2004

    • Author(s)
      Machida, K, Yamada, H.
    • Journal Title

      Key Engineering Materials 270・273

      Pages: 800-807

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Evaluation of the mixed mode stress intensity factor by infrared thermography2004

    • Author(s)
      Machida, K, Sato, M.
    • Journal Title

      Key Engineering Materials 270・273

      Pages: 1262-1269

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 赤外線ハイブリッドサーモグラフィによる混合モード応力拡大係数へのき裂先端曲率半径の影響2004

    • Author(s)
      町田賢司, 佐藤真広
    • Journal Title

      実験力学 4・4

      Pages: 309-314

    • NAID

      10014193419

    • Related Report
      2004 Annual Research Report
  • [Book] よくわかる実験技術・学術用語2006

    • Author(s)
      横山 隆, 松井 剛一, 井口 学編
    • Publisher
      日本実験力学会
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary

URL: 

Published: 2004-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi