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Development of Measuring System for Thermal Deformation of Heatproof Materials by Using Laser Speckle Interferometry at High Temperature

Research Project

Project/Area Number 09555303
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Aerospace engineering
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

MUROZONO Masahiko  Faculty of Engineering, KYUSHU UNIVERSITY,Associate Professor, 工学部, 助教授 (10190943)

Co-Investigator(Kenkyū-buntansha) SHINMOTO Yasuhisa  Faculty of Engineering, KYUSHU UNIVERSITY,Reaearch Associate, 工学部, 助手 (30226352)
YAMASAKI Masahide  Faculty of Engineering, KYUSHU UNIVERSITY,Research Associate, 工学部, 助手 (00038085)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥11,500,000 (Direct Cost: ¥11,500,000)
Fiscal Year 1998: ¥5,200,000 (Direct Cost: ¥5,200,000)
Fiscal Year 1997: ¥6,300,000 (Direct Cost: ¥6,300,000)
KeywordsLaser speckle interferometry / Aerodynamic heating / Thermal deformation / Strain Measurement / High Temperature / Interference fringe / Image processing
Research Abstract

When the materials will be used at a high temperature atmosphere, the properties of the material must be matched with high temperature conditions. However, it is very difficult to measure the thermal strain in structures with existing methods, because the instrument used for strain measurement is in itself influenced by temperature. Electronic speckle pattern interferometry (ESPI) is a very useful method for measuring in-plane surface displacement. Using the cw-laser and the image processing system, it is possible to measure the displacement and strain : Unlike the traditional method for strain measurement such as the strain gauge or the moire method, the ESPI method requires no special surface preparation or the attachments and can measure the in-plane displacement with no contact and in real time. In this study, we discussed the use of ESPI for the measurement of the strain or the thermal strain of the objects at high temperature. And several methods to calculate the strain value from the interference fringe pattern were also discussed. In the experiments, the specimen was loaded in parallel with a load cell which provided the loading step. The specimen was a flat plate or a plate with a 12mm-diameter hole in its center. Strain gauges were attached to the specimen both in parallel and in normal directions to the loading direction. This study provides an example of how ESPI has been used to measure the two- dimensional displacement and strain distribution in the specimen. The results measured by using the ESPI were comparable with the data which were obtained by the strain-gauge method in tensile testing.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (3 results)

All Other

All Publications (3 results)

  • [Publications] Koung-Suk Kim: "A Study on the Thermal Expansion Analysis of Composite Materials using ESPI" 日本航空宇宙学会西部支部講演会(1998)講演集. 234-237 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Koung-Suk KIM,Wan-Shik JANG,Soon-Suck JARNG,Masahiko MUROZONO,Seong-Pil YANG,Hyun-Chul JUNG,and Ki-Soo KANG: "A Study on the Thermal Expansion Analysis of Composite Materials Using ESPI" Proceedings of the JSASS Seibu Branch Annual Conference. 1998. 234-237 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Koung-Sule,Kim: "A Study on the Thesmal Expansion Analysis of Composite Materials using ESPI" 日本航空宇宙学会、西部支部講演会(1998)講演集. 234-237 (1998)

    • Related Report
      1998 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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