Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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A study on the measurement of two-dimensional in-plane displacements of the plate with a circular hole by ESPI method

ESPI에 의한 원공판의 2차원 면내변위 측정에 관한 연구

  • Kim, Kyoung Suk ;
  • Choi, Hyoung Chol ;
  • Yang, Seung Pil ;
  • Kim, Hyoung SooHong, M.S.Jung, W.K.
  • 김경석 (조선대학교 기계설계공학과) ;
  • 최형철 (조선대학교 대학원 기계설계공학과) ;
  • 양승필 (일본 구주대학 항공공학과) ;
  • 김형수홍명석정운관 (조선대학교 기계공학과조선대학교 기계공학과조선대학교 원자력공학과)
  • Published : 1994.10.01
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Abstract

This paper presents the performance and problems in analysis method and testing system of Electronic Speckle Pattern Interfermetry(ESPI) method, in measuring two-dimensional in- plane displacement. The analysis result of measurement by ESPI is quite comparable to that of measurement by strain gauge method. This implieds that the method of ESPI is a very effective tool in non-contact two-dimensional in-plane strain analysis. But there is a controversial point, measurement error. This error is discussed to be affected not by ESPI method itself, but by its analysis scheme of the interference fringe, where the first-order interpolation has been applied to the points of strain measured. Further development of advanced first-order interpolation method is being undertaken for the more precise in-plane strain measurement.

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