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 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.
  • 김경석 (조선대학교 기계설계공학과) ;
  • 김형수 (조선대학교 대학원) ;
  • 양승필 (조선대학교 대학원) ;
  • 김충원정운관홍명석 (조선대학교 컴퓨터공학과조선대학교 원자력공학과조선대학교 기계공학과)
  • Published : 1994.02.01
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Abstract

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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