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ISSN 2753-3239
ISSN 2753-3239
CCC: 3
PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY
PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY
Edited by: B.H.V. Topping and J. Kruis
Paper 16.1
Study on Stress State of Root Notch of Butt Weld with Variable Wall Thickness
B. Guo, D. Wang, H. Liang, X. Xu and R. Zhan
Full Bibliographic Reference for this paper
B. Guo, D. Wang, H. Liang, X. Xu, R. Zhan, "Study on Stress State of Root Notch of Butt Weld with Variable Wall Thickness", in B.H.V. Topping, J. Kruis, (Editors), "Proceedings of the Fourteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK,
Online volume: CCC 3, Paper 16.1, 2022, doi:10.4203/ccc.3.16.1
Abstract
In this paper, the root notch defects of pipe butt welded joints in the application of variable wall thickness design are studied. The model of butt welded joint of variable wall thickness pipeline is established by finite element method. By changing the joint geometric parameters such as variable wall thickness ratio, butt misalignment and variable wall thickness transition angle, the stress triaxiality and maximum principal stress near the root notch of the welded joint are calculated in groups, the influence of the above factors on the calculation results is explored, and the fracture risk of the root notch is analysed. Through the analysis, it can be found that the root notch in the variable wall thickness joint will threaten the safety of the pipe welded joint, and the joint geometry has an obvious influence on the stress state near the root notch.
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