한국해양공학회지 (Journal of Ocean Engineering and Technology)

  • 제26권2호
  • /
  • Pages.26-32
  • /
  • 2012
  • /
  • 1225-0767(pISSN)
  • /
  • 2287-6715(eISSN)
한국해양공학회 (Korean Society of Ocean Engineers)
권호 표지
DOI QR코드

DOI QR Code

수정 S-N곡선법을 이용한 용접연결부의 피로수명 추정

Modified S-N Curve Method to Estimate Fatigue life of Welded Joints

  • 양박달치 (울산대학교 조선해양공학부) ;
  • 김미경 (현대중공업(주) 선박해양연구소)
  • Yang, Park-Dal-Chi (University of Ulsan School of Naval Architecture and Ocean Engineering) ;
  • Kim, Mi-Kyeong (Hyundai maritime Research Institute - Hyundai Heavy Industry Co. Ltd.)
  • 투고 : 2011.12.01
  • 심사 : 2012.04.19
  • 발행 : 2012.04.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

In this paper, the effects of irregular bead shapes on fatigue life were investigated. A modified S-N curve method was used to estimate the fatigue life, which considered the inherent multiaxiality caused by the geometrical feature produced by the welding process. The point method of the critical distance method was used to determine the fatigue effective stress. Three types of fillet joint models were tested in the fatigue experiments. For each model, real bead shapes were collected using a 3D laser scanner, and finite element analyses were performed. The results of the analyses with actual bead shapes were compared with those using an idealized bead shape model. The results of the present analytical methods showed good agreement with the experimental results.

키워드

참고문헌

  1. Brown, M.W. and Miller, K.J. (1973). "A Theory for Fatigue under Multiaxial Stress-strain Conditions", Proceedings of the Institution of Mechanical Engineers, Vol 187, pp 745- 755. https://doi.org/10.1243/PIME_PROC_1973_187_161_02
  2. European Committe for Standardization (CEN) (2005). "Eurocode 3 : Design of Steel Structures, Part1-9: Fatigue (EN1993-1-9)", Brussels, CEN.
  3. Kim, M.H., Kang, S.W., Kim, J.H., Kim, S.M., KIm, K.S., Kang, J.K. and Heo, J.H. (2008). "The Application of Structural Stress Method for the Fatigue Strength Assessment of Longi-web Connections", Journal of the Society of Naval Architects of Korea, Vol 45, No 1, pp 81-86. https://doi.org/10.3744/SNAK.2008.45.1.81
  4. Maddox, S.J. (1991). "Fatigue Strength of Welded Structures", Second edition, Abington Publishing. Woodhead Publ.
  5. Niemi, E., Fricke, W. and Maddox, S.J. (2006). "Fatigue Analysis of Welded Components", IIW-1430-00 Woodhead Publ. International Institute of Welding.
  6. Susmel, L. and Lazzarin, P. (2002). "A Bi-parametric Wöhler Curve for High Cycle Multiaxial Fatigue Assessment", Fatigue and Fracture of Engineering Materials and Structures, Vol 25, pp 63-78. https://doi.org/10.1046/j.1460-2695.2002.00462.x
  7. Susmel, L. and Tovo, R. (2004). "On the Use of Nominal Stresses to Predict the Fatigue Strength of Welded Joints under Biaxial Cyclic Loadings", Fatigue and Fracture of Engineering, Vol 27, pp 1005-1024.
  8. Susmel, L. (2008). "Modified Wohler Curve Method, Theory of Critical Distances and EUROCODE 3: A Novel Engineering Procedure to Predict the Lifetime of Steel Welded Joints Subjected to Both Uniaxial and Multiaxial Fatigue Loadings", International Journal of Fatigue, Vol 30, pp 888-907. https://doi.org/10.1016/j.ijfatigue.2007.06.005
  9. Yang, P.D.C. and Park, C.M. (2009). "Notch Fatigue Analysis Based on the Actual Bead Shape of Welded Joint", Journal of the Society of Naval Architects of Korea, Vol 46, No 4, pp 417-423. https://doi.org/10.3744/SNAK.2009.46.4.417
  10. Yang, P.D.C. and Song, J.K. (2011). "Estimation Fatigue Life of Weldments by Notch Stress Approaches", Journal of Ocean Engineering and Technology, Vol 25, No 5, pp 47-51.