A Study on the Measurement of Crack Length of Pipe Specimen Using Image Processing

이미지 프로세싱을 이용한 실배관 시험편의 균열 길이 측정에 관한 연구

  • Kang, Min-Sung (Department of Mechanical Engineering, Sungkyunkwan University) ;
  • Koo, Jae-Mean (Department of Mechanical Engineering, Sungkyunkwan University) ;
  • Seok, Chang-Sung (Department of Mechanical Engineering, Sungkyunkwan University) ;
  • Huh, Yong (Digital Media Business, Samsung Electronics)
  • 강민성 (성균관대학교 기계공학과) ;
  • 구재민 (성균관대학교 기계공학과) ;
  • 석창성 (성균관대학교 기계공학과) ;
  • 허용 (삼성전자 디지털미디어총괄)
  • Received : 2009.12.29
  • Accepted : 2010.04.08
  • Published : 2010.04.30

Abstract

Difficulties associated with full-scale pipe tests are rather obvious. That is, it is not only difficult to perform them but also very expensive and it requires lots of experience. And the process of the fracture test for the pipe specimen is very difficult and complicated. Because the pipe specimen, the test jig and the test equipment are very large and heavy, it requires lots of costs and times. In this study, to easily perform the fracture toughness test for a pipe specimen, load line displacement data was obtained using the image processing method.

Keywords

References

  1. U. S. NRC Piping Review Commission, "Evaluation of Potential for Pipe Break", Report of the U. S. Nuclear Regulatory Commission Piping Review Committee, NUREG-1061, Vol. 3, 1983.
  2. Fabi, R. J. and Peck, D. A., "Leak Before Break Piping Evaluation Diagram", ASME Conference, PVP, Vol. 283, pp. 111-115, 1994.
  3. Y. J. Yu, S. H. Park, G. H. Sohn, Y. J. Kim and Urko, W., "Application of LBB to a Nozzle-Pipe Interface", LBB 95, Lyon-France, 1995.
  4. Joyce, J. A., Hackett, E. M. and Roe, C., "Effects of Crack Depth and Mode of Loading on the J-R Curve Behavior of a High-Strength Steel", Constraint Effects in Fracture, ASTM STP 1171, pp. 239-263, 1993.
  5. J. H. Hong, B. S. Lee, and J. M. Oh, "Evaluation of Fracture Resistance Characteristic for Yonggwang Nuclear Primary Piping System Unit 3, 4", 1st, Evaluation of the Pipe integrity workshop, pp. 41-52, 1993.
  6. C. S. Seok, and B. K. Kang, "Evaluation of Fracture Resistance Characteristics of SA 508 CL. 1a Carbon Steel for Piping System", KSME(A), Vol. 23, No. 7, pp. 1147-1154, 1999.
  7. Hopper, A., Wilkowski, G. M., Scott, P., Olson, R., Rudland, D., Kilinski, T., Mohan, R., Ghadiali, N. and Paul, D., "The Secondary International Piping Integrity Research Group Program Final Report", NUREG/CR- 6452, 1996.
  8. J. S. Park, and C. S. Seok, "A Study on the Evaluation of the Pipe Fracture Characteristic(I)", Spring Conference of KSME, pp. 345-350, 2001.
  9. J. S. Park, and C. S. Seok, "A Study on the Evaluation of the Pipe Fracture Characteristic(II)", Spring Conference of KSME, pp. 436-441, 2002.