Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
권호 표지

A Study on the Measurement of the Internal Crack in Flange Welding Zone by Digital Shearography

전자전단 간섭법을 이용한 플랜지 용접부 내부 결함 측정에 관한 연구

  • Kim, Jeong-Pil (Department of Mechanical Design, Graduate school of Chonbuk Univ.) ;
  • Kang, Young-June (Department of Mechanical Design Engineering, Chonbuk Univ.) ;
  • Park, Sang-Kyu (Dept. of Mechanical & Automotive Engineering, Woosuk Univ.)
  • 김정필 (전북대학교 대학원 기계설계학과) ;
  • 강영준 (전북대하교 기계설계공학부) ;
  • 박상규 (우석대학교 자동차공학과)
  • Published : 2009.01.01
Download PDF
⟨ Previous Next ⟩

Abstract

There is a many kinds with nondestructive testing such as RT and UT representatively. Referred before two testing methods there is a limit which is spatial such as nuclear pipe, small vessel, sealing up vessel. So a new technique needs to overcome the limit which is spatial. shearography will be able to overcome the limit which is spatial. This paper introducing shearography which was known as non-contact full-field testing method and It is an interferometric technique for measurement of surface deformation such as displacement or displacement gradient. Also, a research about internal defect of the flange welding zone was accomplished. About variation with method pressurized with the Gaseous Nitrogen. Phase map where is various were measured according to changing a sheared direction, size of crack and loaded pressure. Consequently, crack quantitatively to be detected qualitatively was measured by using shearography.

Keywords

References

  1. Lobanov, L. M., Pivtorak, V. A., Kyyanets, I. V. and Savytska, O. M., "Nondestructive testing of composite and metallic pipes by the method ofelectronic shearography," Materials Science, Vol. 43, No. 4, pp. 522-527, 2007 https://doi.org/10.1007/s11003-007-0060-x
  2. Mader, D. L., "Holographic and nonholographic NDT for nuclear and coal-fired power plants," SPIE, Vol. 604, pp. 37-56, 1986
  3. Hung, Y. Y., "Shearography: A Practical Nondestructive Testing Method," International Advances in Nondestructive Testing, Vol. 14, 1989
  4. Steinchen, W., Yang, L. X., Kupfer, G. and Maeckel, P., "Nonde-structive testing of micro-cracks using digital speckle pattern shearing interferometry," Proc. of SPIE, Vol. 3098, pp. 528-535, 1997 https://doi.org/10.1117/12.281199
  5. Steinchen, W., Yang, L. X., Schuth, M. and Kupfer, G., "Electronic Shearography(ESPI) for direct measurement of Strains," Proc. of SPIE, Vol. 2248, pp. 210-221, 1994 https://doi.org/10.1117/12.194322
  6. Kang, Y. J., Lee, J. S. and Baik, S. H., "A Study on Evaluation of Defects of Pressure Vessel by Using ESPI and FEM," J. of the KSPE, Vol. 24, No. 12, pp.104-110, 2007
  7. Lomov, S. V., Ivanov, D. S., Verpoesta, I., Zakob, M., Kurashikib, T., Nakaib, H., Molimardc, J. and Vautrin,A., "Full-field strain measurements for validation ofmeso-FE analysis of textile composites," Composites Part A: Applied Science and Manufacturing, Vol. 9, Issue 8, pp. 1218-1231, 2008 https://doi.org/10.1016/j.compositesa.2007.09.011