Influence of the welding sequence on residual stress and distortion of fillet welded structures

被引:112
作者
Fu, Guangming [1 ]
Lourenco, Marcelo Igor [1 ]
Duan, Menglan [2 ]
Estefen, Segen F. [1 ]
机构
[1] Univ Fed Rio de Janeiro, COPPE, Ocean Engn Program, POB 68508, BR-21941972 Rio De Janeiro, Brazil
[2] China Univ Petr, Offshore Oil Gas Res Ctr, Beijing 102249, Peoples R China
关键词
Welding sequence; Fillet weld; Residual stress; Distortion; STAINLESS-STEEL PIPE; NUMERICAL-SIMULATION; TEMPERATURE-FIELD; DEFORMATION; JOINT; PREDICTIONS; MODEL; FEM;
D O I
10.1016/j.marstruc.2015.12.001
中图分类号
U6 [水路运输]; P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
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.
引用
收藏
页码:30 / 55
页数:26
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