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Experiments and Finite Element Analysis for the Estimation of Stress Relief in Welded Structures

반복 하중을 받는 용접 구조물의 잔류 응력 저감 파악을 위한 유한요소 해석 및 실험적 연구

  • Yang, Yong-Sic (Department of Naval Architecture and Ocean Engineering, Inha University) ;
  • Kang, Joong-Kyoo (Daewoo Shipbuilding & Marine Engineering Co., Ltd., Ship and Marine Structure R&D Team) ;
  • Lee, Jang-Hyun (Department of Naval Architecture and Ocean Engineering, Inha University) ;
  • Kim, Sung-Chan (Department of Ship Structure and Ocean System, Inha Technical College) ;
  • Hwang, Se-Yum (Department of Naval Architecture and Ocean Engineering, Inha University)
  • 양용식 (인하대학교 조선해양공학과) ;
  • 강중규 (대우조선해양 구조R&D) ;
  • 이장현 (인하대학교 조선해양공학과) ;
  • 김성찬 (인하공업전문대학 선박해양시스템과) ;
  • 황세윤 (인하대학교 조선해양공학과)
  • Received : 2010.08.26
  • Accepted : 2011.03.30
  • Published : 2011.06.20

Abstract

Welding inevitably introduces the residual stresses which affect the fatigue strength of the joint structure. The mitigation of fatigue strength depends on the residual stress magnitude and distribution. Stress relief analyses are of practical interest for all cyclic loaded welded structures, such as ships and offshore structures. In order to estimate the effects of relaxation of residual stresses in the welded structure, this paper presents a finite element analysis procedure and experimental results for the welded structure. Cruciform specimens joint by MAG welding have been tested to measure the released stress. Relieved welding residual stresses obtained by finite element analysis are compared with those measured by experiment.

Keywords

References

  1. Chang, P.H. & Teng, T.L., 2003, Numerical and Experimental Investigations on the Residual stresses of the Butt-Welded Joints, Journal of Computational Materials Science, 29, pp.511-522.
  2. Do, H.D. et al., 2009, Fatigue Assessment in accordance with Back Plate of Butt Welded Specimens, Journal of the Society of Naval Architects of Korea, 46(1), pp.24-30. https://doi.org/10.3744/SNAK.2009.46.1.024
  3. Goldak, J. Chakravarti, A. & Bibby, M., 1984, A New Finite Element Model for Welding Heat Sources, Metallurgical Transactions B, 15(B), pp.299-305.
  4. Han, S.H. Lee, T.K. & Shin, B.C., 2002, A Quantitative Estimation of Welding Residual Stress Relaxation for Fatigue Strength Analysis, Transactions of the Korean Society of mechanical engineers: A, 26(10), pp. 2018-2035. https://doi.org/10.3795/KSME-A.2002.26.10.2018
  5. Hwang, S.Y. Lee, J.H. Kim, B.J. & Yang, Y.S., 2010(a), Numerical Analysis of Welding Residual Stresses for Ultra-Thick Plate of EH40 Steel Joined by Tandem EGW, Journal of the Society of Naval Architects of Korea, Vol. 47(6).
  6. Hwang, S.Y. et al., 2010(b), Numerical Analysis of Welding Residual Stresses for Ultra-thick Plate of EH40 TM and API 2W Gr.50 Steel Joined by Flux Core Arc Welding, Journal of KWJS, 28(3), pp.65-72.
  7. Kim, K.S. et al., 2008(a), A Study of Crack Propagation and fatigue Life Prediction on Welded Joints of Ship Structure(I), Journal of the Society of Naval Architects of Korea, 45(6), pp.669-678. https://doi.org/10.3744/SNAK.2008.45.6.669
  8. Kim, K.S. et al., 2008(b), A Study of Crack Propagation and fatigue Life Prediction on Welded Joints of Ship Structure(II), Journal of the Society of Naval Architects of Korea, 45(6), pp.679-687. https://doi.org/10.3744/SNAK.2008.45.6.679
  9. Lee, J.B. et al., 2009, Cyclic Stress-strain Hardening Model of AC4C-T6 Alloy at Cryogenic Temperature, Journal of the Society of Naval Architects of Korea, 46(5), pp.498-509. https://doi.org/10.3744/SNAK.2009.46.5.498
  10. Lee, J.H. Hwang, S.Y. & Yang, Y.S., 2007, Effect of Melting Pool on the Residual Stress of Welded Structure in Finite Element Analysis, Journal of Ship & Ocean Technology, 11(3), pp.14-23.
  11. MSC Software Co. Ltd., 2007, MSC.Marc Volume A: Theory and User Information.
  12. Nitschke-Pagel, T. & Dilger, K., 2009, Residual Stress Relaxation in Welded High Strength Steel Steels under Static and Cyclic Loading, Proceedings of the Nineteenth (2009) International Offshore and Polar Engineering Conference.
  13. Nguyen, N.T. et al., 1999, Analytical Solutions for Transient Temperature of Semi-Infinite Body Subjected to 3-D Moving Heat Sources, Welding Journal, pp.265-274.
  14. Rykalin, R.R., 1974, Energy Source for Welding, Houdrement Lecture, International Institute of Welding, pp.1-23.
  15. Smith, D.J. Farrahib, G.H. Zhuc, W.X. & McMahona, C.A., 2001, Experimental Measurement and Finite Element Simulation of the Interaction between Residual Stresses and Mechanical Loading, International Journal of fatigue, 23(3), pp. 293-302. https://doi.org/10.1016/S0142-1123(00)00104-3
  16. Walker, C.A. Waddal, A.J. & Johnston, D.J., 1994, Vibratory Stress Relief – An Investigation of The Underlying Processes, Journal of Process Mechanical Engineering, 209, pp.51-58.
  17. Webster, G.A. & Ezeilo, A.N., 2001, Residual stress distributions and their influence on fatigue lifetimes, International Journal of Fatigue, 23(1), pp.375-383.
  18. Zhuang, W.Z. & Halford, G.R., 2001, Investigation of residual stress relaxation under cyclic load, International Journal of Fatigue, 23(1), pp.31-37. https://doi.org/10.1016/S0142-1123(01)00132-3