Journal of Welding and Joining

  • 제33권2호
  • /
  • Pages.62-68
  • /
  • 2015
  • /
  • 2466-2232(pISSN)
  • /
  • 2466-2100(eISSN)
대한용접접합학회 (The Korean Welding and Joining Society)
권호 표지
DOI QR코드

DOI QR Code

Reverse Bending을 통한 CTOD 시험 예비균열 형상균일화에 관한 연구

A study on reduction of pre-crack deviation in CTOD specimen using reverse bending method

  • 정세환 (현대중공업 생산기술연구소 구조연구실) ;
  • 박동환 (울산대학교 자동차선박기술대학원) ;
  • 김현수 (현대중공업 생산기술연구소 구조연구실) ;
  • 신상범 (현대중공업 생산기술연구소 구조연구실) ;
  • 박태종 (현대중공업 생산기술연구소 재료연구실)
  • Jeong, Sehwan (Institute of e-Vehicle Technology, University of Ulsan) ;
  • Park, Dong-Hwan (Structure research department, Industrial Technology Institute, Hyundai Heavy Industry) ;
  • Kim, Hyeon-Su (Institute of e-Vehicle Technology, University of Ulsan) ;
  • Shin, Sang-Beom (Institute of e-Vehicle Technology, University of Ulsan) ;
  • Park, Tae-Jong (Materials research department, Industrial Technology Institute, Hyundai Heavy Industry)
  • 투고 : 2015.03.24
  • 심사 : 2015.04.23
  • 발행 : 2015.04.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

This study investigates the appropriate range of reverse bending load for the CTOD test of thick weld by observing improvement of pre-crack shape and determination of the limit applicable load. In order to do it, the effect of the amount of the reverse bending load on the maximum deviation of the pre-crack length was investigated by the extensive tests, and the variation of plastic zone size in way of the crack tip under reverse bending load were evaluated by FEA. With the results obtained by the experiments and FEA, the proper range of reverse bending load was suggested. The effectiveness of the reverse bending method was verified by examining the pre-crack straightness after CTOD tests of thick weld specimens with various thickness and strength.

키워드

참고문헌

  1. T. Inoue, T. Ishikawa, S. Imai, T. Koseki, K. Hirota, M. Tada, H. Kitada, Y. Yamaguchi and H. Yajima, Long Crack Arrestability of Heavy-Thick Shipbuilding Steels, Proceedings of International Offshore and Polar Engineering Conference, (2006), 132
  2. J. S. Park, B. Y. Jung, G. B. An and J. B. Lee, Crack Arrest Toughness of Thick Steel Plate Welds for Ship Building, Journal of KWJS, 25(4), 9-14 (in Korean)
  3. BS 7448-Part2, Method for Determination of KIC, critical CTOD and Critical J values of welds in metallic materials, (1997)
  4. HS Reemsnyder, HG Pisarski and MG Dawes: Residual Stesses and Fatigue Precracking Techniques for Weldment Fracture Toughness Specimens, Journal of Testing and Evaluation, 20(6)
  5. M. KOCAK et al, Comparision of Fatigue Precracking Methods for Fracture Toughness Testing of Weldments, Proc. Int. Conf. Welding, 1990
  6. S. B Shin, A Study on Design Criteria of Hatch Coaming Weldment in Ultra-Large Containership on the Basis of Fracture Mechanics, Ph. D thesis School of Naval architecture & Ocean Engineering, University of Ulsan, (2009)
  7. A. F. Bower, Applied Mechanics of Solids, CRC Press, (2009)