Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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The Measurement of the Crack in CCT Specimen Using the Image Processing Techniques

영상처리기법을 이용한 CCT 시편 균열의 자동관측법에 관한 연구

  • Lee, Hyun-Woo (Mechanical Technology Research Center, Busan National University) ;
  • Mun, Gi-Tae (Dept.of Precision Mechanical Engineering, Graduate School of Busan National University) ;
  • Oh, Se-Jong (Dept.of Precision Mechanical Engineering, Graduate School of Busan National University) ;
  • Jeong, Byung-Woo (Agency for Defense Development)
  • 이현우 (부산대학교 기계기술연구소) ;
  • 문기태 (부산대학교 대학원 정밀기계공학과) ;
  • 오세종 (부산대학교 대학원 정밀기계공학과) ;
  • 정병우 (국방과학연구소)
  • Published : 1997.01.01
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Abstract

In the analysis of fatigue crack propagation behavior, the crack length is one of the most important factors. In the test of crack propagation, compliance method is widely used to detect crack length. The measurement of surface crack length is not so easy with compliance method. In this study, the image processing technique was applied to measure the surface crack length. CCD(Charge-coupled device) camera was used to observe the crack image and the computer program to detect crack length from stored crack image was developed. CCT(Center Cracked Tension) specimen was used to compare the compliance method with the image processing technique. The crack length which detected by the image processing techniques was found to be well consistent with that from the optical measurement.

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