Journal of the Society of Disaster Information (한국재난정보학회 논문집)

The Korean Society of Disaster Information (한국재난정보학회)
권호 표지
DOI QR코드

DOI QR Code

Behavior of girth-welded buried steel pipes under external pressure

원주 용접된 압력 매설강관의 거동 분석

  • Jeon, Juntai (Department of Civil & Environmental Engineering, Inha Technical College) ;
  • Lee, Chinhyung (The Graduate School of Construction Engineering, Chung-Ang University) ;
  • Chang, Kyongho (Department of Civil and Environmental & Plant Engineering, Chung-Ang University)
  • Received : 2014.11.10
  • Accepted : 2014.12.02
  • Published : 2015.03.31
Download PDF
⟨ Previous Next ⟩

Abstract

This paper presents finite element (FE) analyses to clarify the effects of external pressure on the residual stresses in a girth-welded steel pipe. At first, FE simulation of the girth welding process is carried out to obtain the weld-induced residual stresses employing sequentially coupled three-dimensional (3-D) thermo-mechanical FE formulation. Then, 3-D elastic-plastic FE analyses incorporating the residual stresses and plastic strains obtained from the preceding FE simulation are performed to investigate the residual stress behavior in the girth-welded pipe under external pressure. The FE analysis results show that the hoop compressive stresses induced by the external pressure significantly alter the hoop residual stresses in the course of the mechanical loading.

본 연구에서는 토압 등의 외압이 원주 용접된 매설 강관의 잔류응력에 미치는 영향을 유한요소 해석을 통하여 명확히 하였다. 먼저 3차원 열탄소성 해석을 통하여 원주 용접된 강관의 잔류응력을 구하였으며, 이를 초기조건으로 설정하여 3차원 탄소성 해석을 수행함으로써 외압이 작용하는 경우 잔류응력 거동을 조사하였다. 해석결과 외압에 의해 원주 용접부에 발생하는 원주방향 압축응력 때문에 원주방향 잔류응력이 압축 측으로 상당히 많이 이동함을 알 수 있었고, 축방향 잔류응력은 작용하는 외압에 의해 거의 영향을 받지 않음을 알 수 있었다.

Keywords

References

  1. Abid, M., Siddique, M. (2005). "Numerical simulation to study the effect of tack welds and root gap on welding deformations and residual stresses of a pipe-flange joint." International Journal of Pressure Vessels and Piping, Vol. 82, pp.860-871. https://doi.org/10.1016/j.ijpvp.2005.06.008
  2. Brickstad, B., Josefson, B.L. (1998). "A parametric study of residual stresses in multi-pass butt-welded stainless steel pipes." International Journal of Pressure Vessels and Piping, Vol.75, pp.11-25. https://doi.org/10.1016/S0308-0161(97)00117-8
  3. Deng, D., Murakawa, H. (2006). "Numerical simulation of temperature field and residual stress in multi-pass welds in stainless steel pipe and comparison with experimental measurements." Computational Materials Science, Vol. 37, pp.269-277. https://doi.org/10.1016/j.commatsci.2005.07.007
  4. Deng, D., Liang, W., Murakawa, H. (2007). "Determination of welding deformation in fillet-welded joint by means of numerical simulation and comparison with experimental measurements." Journal of Materials Processing Technology, Vol. 183, pp.219-225. https://doi.org/10.1016/j.jmatprotec.2006.10.013
  5. Duranton, P., Devaux, J., Robin, V., Gilles, P., Bergheau, J.M. (2004). "3D modeling of multipass welding of a 316L stainless steel pipe." Journal of Materials Processing Technology, Vol. 153-154, pp. 457-463. https://doi.org/10.1016/j.jmatprotec.2004.04.128
  6. Goldak, J., Akhlagi, M. (2005). Computational welding mechanics, Springer.
  7. Lindgren, L-E. (2001). "Finite element modelling and simulation of welding, Part 2 Improved material modeling." Journal of Thermal Stresses, Vol. 24, pp.195-231. https://doi.org/10.1080/014957301300006380
  8. Mochizuki, M., Hayashi, M., Hattori, T. (2000). "Residual stress distribution depending on welding sequence in multi-pass welded joints with X-shaped groove." Journal of Pressure Vessel Technology, Vol. 122, pp.27-32. https://doi.org/10.1115/1.556142
  9. Withers, P.J. (2007). "Residual stress and its role in failure." Reports on Progress in Physics, Vol. 70, pp.2211-2264. https://doi.org/10.1088/0034-4885/70/12/R04
  10. Yaghi, A., Hyde, T.H., Becker, A.A., Sun, W., Williams, J.A. (2006). "Residual stress simulation in thin and thick-walled stainless steel pipe welds including pipe diameter effects." International Journal of Pressure Vessels and Piping, Vol. 83, pp.864-874. https://doi.org/10.1016/j.ijpvp.2006.08.014
  11. Yang, S.C. (2002). "The behavior of stress and deformation in steel pipe welding joint under load." Ms. Thesis, Chung-Ang University.
  12. Um, D.S., Yoo, K.Y. (1997). "The experimental studies on residual stresses due to circumferential welds in thin steel cylinder." Journal of Korean Welding Society, Vol. 15, pp.107-113.
  13. Chang, K.H., Yang, S.C., Kang, J.H. (2001). "Production mechanism of residual stress generated by multi-pass welding of the steel pipe." Journal of Korean Society of Steel Construction, Vol. 13, pp.327-335.
  14. Chang, K.H., Lee, C.H. (2002). "Analysis of residual stress in welds composed by dissimilar steels under tensile loads." Journal of Korean Society of Civil Engineers, Vol. 22, pp.201-210.

Cited by

  1. A Study on the Mechanical Properties of Gas Pressure Welded Splices of Deformed Reinforcing Bar vol.11, pp.4, 2015, https://doi.org/10.15683/kosdi.2015.11.4.520