PSI - Issue 2_B

Xuesong Liu et al. / Procedia Structural Integrity 2 (2016) 2038–2045 Author name / Structural Integrity Procedia 00 (2016) 000–000

2045

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4. Conclusion This paper presents the misalignment effect on stress concentration of butt welded joints in plated structures by FE simulations. As the structure shows geometric variations on the mismatched thickness, the hole size surrounding transition zone, the position of structure plane and the slope of thickness transition. a series of geometric models are compared and we can draw the following conclusions from the study: ● The existing of cope hole can influence the peak stress surrounding the transition zone. The increasing of cope hole size results in decreasing of SCF due to the constraint releasing. ● According to the SCFs results of different positions of structure plane, the cope hole inside of structure plane SCFs is higher than outside of structure plane compared with analytical equation result, especially the intersection zone. ● The study of plates thickness combination and the slope of transition indicates that SCFs are sensitive to thickness variation. References Maddox SJ, 1985. Fitness-for-purpose assessment of misalignment in transverse butt welds subject to fatigue loading. Maddox SJ, 1997. Developments in fatigue design codes and fitness-for-service assessment methods. IIW International Conference on Performance of Dynamically-loaded Welded Structures, 22-42. DNV, 2013. DNV-RP-C203: Fatigue design of offshore steel structures. BS7910, 2013. Guidance on methods for assessing the acceptability of flaws in metallic structures. BSI. EN-1993-1-9, 2005. Eurocode 3: design of steel structures-part 1-9: fatigue. Lotsberg I, 2008. Stress concentration factors at welds in pipelines and tanks subjected to internal pressure and axial force. Marine Structures 21, 138-59. Lotsberg I, 2006. Fatigue design of plated structures using finite element analysis. Journal of Ships and Offshore Structures 1, 45-54.