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2002 Fiscal Year Final Research Report Summary

Development of a simple automatic measurement of the deformation or strain using a TV camera

Research Project

Project/Area Number 12555030
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Materials/Mechanics of materials
Research InstitutionSASEBO NATIONAL COLLEGE OF TECHNOLOGY

Principal Investigator

FUKUDA Takayuki  Department of Mechanical Engineering, Associate Professor, 機械工学科, 助教授 (10181273)

Co-Investigator(Kenkyū-buntansha) USHIJIMA Seiji  DAISHIN GIKEN Co., Ltd. Technology Development Division, Researcher, 技術開発事業部, 研究員
KAWASUE Kikuhito  Miyazaki University, Department of Mechanical Systems Engineering, Associate Professor, 工学部, 助教授 (20214645)
FUJIMURA Kensei  Department of Mechanical Engineering, Professor, 機械工学科, 教授 (50039666)
Project Period (FY) 2000 – 2002
KeywordsMeasurement of deformation or strain / Image correlation technique / TV camera / Measurement of a large deformation / Non-contact measurement / Measurement of the strain distribution
Research Abstract

This study is the development of an automatic measurement, taken by TV camera, of the deformation of real objects. The images from a TV camera or a microscope are digitized and stored in the computer memory while the specimen is being deformed. The images recorded at different times are compared each other and the deformation is calculated automatically. Fortunately, since the magnified surface image has a characteristic pattern, it can be utilized for the adequate marking and, therefore, the manual drawing of meshes or marks on the surface is unnecessary. The cross-correlation method is used for the image processing. In the cross-correlation method, the first original image is divided into small square meshes on the computer memory. Though the size of meshes should be changed depending on the magnification of a microscope or the grain size of a specimen, in this technique the size can be changed easily without contact to the surface since the image data is processed on the computer memory.
In our experiments, static tensile and torsional tests of carbon steels are carried out. Then those specimen surfaces are locally observed. The characteristic of micro-deformations under these static loads is made clear from the results obtained by the image processing technique.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] T.Fukuda, H.Nisitani, T.Teranishi, K.Fujimura: "Application of Linear Notch Mechanics to the Fatigue Streng-th of Notched Steel Specimens"Key Engineering Materials. Vols.243-244. 333-338 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Fukuda, H.Nisitani: "The Background of Fatigue Limit Ratio of Torsional Fatigue to Rotating Bending Fatigue in Isotoropic Materials and Ma-terials with Clear-Banded Structure"Biaxial/Multiaxial Fatigue and Fracture. ESIS STP Volume 31. 285-303 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Fukuda, H.Nisitani, K.Kawasue: "Quantitative Measurement of Micro-Deformation of Electropol-ished Carbon Steel Using An Image Processing Technique"International Journal of Modern Physics B. Vol.17 Nos.1&2. 539-544 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Fukuda, H.Nisitani, K.Fujimura: "Fatigue Limit Ratio of Torsional Fatigue to Rotating BendingFatigue in Isotropic Material and Materials with Clear-Banded Structure"Proceedings of the Sixth International Conference on Biaxial/Multiaxial Fatigue & Fracture. Volume II. 786-794 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 福田孝之, 川末紀功仁, 西谷弘信, 藤村顕世: "画像相関法による炭素鋼の静的変形における局所的ひずみの測定"佐世保工業高等専門学校研究報告. 第38号. 13-18 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Fukuda, H. Nisitani, T. Teranishi, K. Fujimura,: "Application of Linear Notch Mechanics to the Fatigue Strength of Notched Steel Specimens"Key Engineering Materials. Vols.243-244. 333-338 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Fukuda, H. Nisitani: "The Background of Fatigue Limit Ratio of Torsional Fatigue to Rotating Bending Fatigue in Isotoropic Materials and Materials with Clear-Banded Structure"Biaxial/Multiaxial Fatigue and Fracture, ESIS STP. Vol.31. 285-303 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Fukuda, H. Nisitani, K Kawasue: "Quantitative Measurement of Micro-Deformation of Electropolished Carbon Steel Using An Image Processing Technique"International Journal of Modern Physics B. Vol.17 Nos.1&2. 539-544 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Fukuda, H. Nisitani, K. Fujimura: ""Fatigue Limit Ratio of Torsional Fatigue to Rotating Bending Fatigue in Isotropic Material and Materials with Clear-Banded Structure"Proceedings of the Sixth International Conference on Biaxial/Multiaxial Fatigue & Fracture. Vol.II. 786-794 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Fukuda, K. Kawasue, H. Nisitani, K. Fujimura,: "Measurement of Local Deformation of Carbon Steel Using an Image Correlation Technique"Research Reports of Sasebo College of Technology. No.38. 13-18 (2001)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2004-04-14  

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