The residual stress and deformation due to the welding process have significant influences on the service performance of the welded deepwater platform hull. An exact prediction of transient temperature distribution is the important prerequisite to ensure the simulation accuracy of the welding residual stress and deformation fields, especially in the multi-pass welding process. Although the transient temperature distribution and residual stress distribution was studied in the past by various authors, the literature on 3D finite element (FE) simulation of multi-pass welding process is limited. In this paper, a FE model is developed to analyze the transient temperature and residual stress distribution of AH36 steel sheets in multi-pass welding process. A moving heat source model based on Goldak’s double-ellipsoidal heat flux distribution is employed for the heated plates. The addition of the volumetric heat source into the FE model and its movement along the welding pass are realized through a dedicated FORTRAN subroutine. The element birth and death technique in Abaqus/Standard is employed to simulate the weld filler variation with time in welded joints. The transient temperature calculated in the first stage is utilized as the input to the residual stress and distortion due to thermal shrinkage during the welding process and subsequent cooling. The results show good agreements between the temperature distribution and the geometry of weld pool obtained in the present work and those previously reported. Finally, a parametric study is performed to investigate the effect of welding variables, such as geometric parameters of Goldak’s heat source model, welding speed, pre-heat temperature and power input in the multi-pass welds, on the residual stress and distortion of the steel sheets.
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ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering
July 1–6, 2012
Rio de Janeiro, Brazil
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4489-2
PROCEEDINGS PAPER
Finite Element Modeling of Transient Temperature and Residual Stress Distribution Analysis in Multi-Pass Welding Process Available to Purchase
Guang-Ming Fu,
Guang-Ming Fu
Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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Chen An,
Chen An
Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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Marcelo Igor Lourenço,
Marcelo Igor Lourenço
Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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Meng-Lan Duan,
Meng-Lan Duan
China University of Petroleum, Beijing, China
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Segen F. Estefen
Segen F. Estefen
Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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Guang-Ming Fu
Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Chen An
Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Marcelo Igor Lourenço
Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Meng-Lan Duan
China University of Petroleum, Beijing, China
Segen F. Estefen
Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Paper No:
OMAE2012-83709, pp. 445-454; 10 pages
Published Online:
August 23, 2013
Citation
Fu, G, An, C, Lourenço, MI, Duan, M, & Estefen, SF. "Finite Element Modeling of Transient Temperature and Residual Stress Distribution Analysis in Multi-Pass Welding Process." Proceedings of the ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. Volume 2: Structures, Safety and Reliability. Rio de Janeiro, Brazil. July 1–6, 2012. pp. 445-454. ASME. https://doi.org/10.1115/OMAE2012-83709
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