• Title/Summary/Keyword: 조선대학교

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A Study on the Measurement of two Dimensional Strain by ESPI Method and Image processing (E.S.P.I법과 화상처리에 의한 2차원의 스트레인 측정에 관한 연구)

  • KIM, K.S.;KIM, H.S.;YANG, S.P.;KIM, C.W.;JUNG, Y.G.;HONG, M.S.
    • Journal of the Korean Society for Precision Engineering
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    • v.11 no.1
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    • pp.114-122
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    • 1994

  • ESPE(Electonic-Speckle-Pattern-Interferometry) is very useful method for measuring In-plane displacement. Using the CW-Laser and Image processing system, it is possible to measure displacement and strain. Unlike traditional straingauge or moire' method, ESPI method requires no special surface preparation or attachments and can be measured In-plane displacement with no contact and real time. In this experimental specimen was loaded in paralled with loadcell, which provided loading step. The specimen was sheet plate, which was attached straingauge in x-y direction. In this study provides an example of how ESPI has been used to measure two dimensional displacement and strain distribution in this specimen. The results measured by ESPI compare with the data which was measured straingauge method in tensile testing at 1 ton range.

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