Journal
MARINE STRUCTURES
Volume 46, Issue -, Pages 30-55Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.marstruc.2015.12.001
Keywords
Welding sequence; Fillet weld; Residual stress; Distortion
Categories
Funding
- Brazilian agency FAPERJ [44/2014/PAPD-RJ]
- Brazilian agency FINEP [456319/2013-1]
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T-joints are one of the most common welded joints used in the construction of offshore structures, including ships and platforms. In the present study, a sequentially coupled thermo-mechanical finite element model that considers temperature-dependent material properties, high temperature effects and a moving volumetric heat source was used to investigate the effect of welding sequence on the residual stresses and distortions in T-joint welds. The parameters of Goldak's double ellipsoidal heat source model were predicted using a neural network. The numerical models were successfully validated by the experimental tests. The results show that the welding sequences have significant effects on the residual stresses and distortions, both in the magnitude and distribution mode. The optimization of the Welding sequences should be investigated numerically or experimentally before the construction welded structure. (C) 2015 Elsevier Ltd. All rights reserved.
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