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Heat transfer and stress analysis during multi-pass butt-welding of NG pipe by FEM
Heat transfer, residual stresses and deformations during a mult-phase butt-welding of NG (natural gas) pipes have been analysed using a 2-dimensional thermo-elastoplastic finite element method. A double ellipsoidal power density distribution model has been used to take into account the heat distribution by a moving arc, and an element birth technique has been also used to model the multi-pass welding. The calculated sizes of FZ and HAZ are in good agreement with the experimentally measured one. The maximum residual effective stresses and effective plastic strain are found to be developed in the boundary between FZ and HAZ. The hoop residual stresses of inner surface of pipe are determined at the 1 and 2-pass of welding and those of outer surface are determined at the 3-pass of welding.
Heat transfer and stress analysis during multi-pass butt-welding of NG pipe by FEM
Heat transfer, residual stresses and deformations during a mult-phase butt-welding of NG (natural gas) pipes have been analysed using a 2-dimensional thermo-elastoplastic finite element method. A double ellipsoidal power density distribution model has been used to take into account the heat distribution by a moving arc, and an element birth technique has been also used to model the multi-pass welding. The calculated sizes of FZ and HAZ are in good agreement with the experimentally measured one. The maximum residual effective stresses and effective plastic strain are found to be developed in the boundary between FZ and HAZ. The hoop residual stresses of inner surface of pipe are determined at the 1 and 2-pass of welding and those of outer surface are determined at the 3-pass of welding.
Heat transfer and stress analysis during multi-pass butt-welding of NG pipe by FEM
Wärmeübertragungs- und Spannungsanalysen mittels FEM beim Mehrfach-Stumpfschweißen von Erdgasleitungen
Titel koreanisch
Bang, In-Wan (author) / Lee, Yong-Gi (author) / Kim, Woo-sik (author) / Kim, Young-Pyo (author) / Oh, Kyu-Hwan (author)
Journal of the Korean Institute of Metals and Materials ; 35 ; 1066-1074
1997
9 Seiten, 11 Bilder, 5 Tabellen, 20 Quellen
Article (Journal)
Korean
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