Welding distortion and inherent deformation under temporary tacking and its released states

Abstract

In the present study, the detailed welding distortion of bead welded plates under temporary tacking state and released state was predicted by thermal elastic-plastic finite element model (FEM) and also measured by the digital image correlation (DIC) method. It was found that the residual welding angular distortion can be reduced to about 50-60% by temporary tacking, while the residual transverse shrinkage and longitudinal shrinkage are less affected. Further, the welding distortion with different ratios of temporary tacking length to weld length for various dimensions of bead welded plates was quantitatively investigated by FEM. The inherent deformations which are described by the integrated values of residual plastic strains were proved to be the same before and after releasing the temporary tacking. The effect of temporary tacking on the welding distortion and inherent deformation were analysed in details.

Effects of heat input on welding buckling distortion by experimental measurement method

“…Deng et al [8] predicted welding distortion of a large thin-plate panel structure by the elastic FEM based on the inherent strain theory and found that the large deformation theory should be carefully considered; furthermore, the simulation results indicate that both welding procedure and assembly sequence significantly affect the final deformation. Ma et al [9] studied the welding distortion of bead welded plates under temporary tacking state and released state by thermalelastic-plastic FEM. It was found that the residual welding angular distortion can be reduced greatly by temporary tacking, while the residual transverse shrinkage and longitudinal shrinkage are less affected.…”

“…Ma et al. [9] studied the welding distortion of bead welded plates under temporary tacking state and released state by thermal-elastic–plastic FEM. It was found that the residual welding angular distortion can be reduced greatly by temporary tacking, while the residual transverse shrinkage and longitudinal shrinkage are less affected.…”

Optimization of Gas Metal Arc Welding (GMAW) Parameters for Minimum Distortion of T Welded Joints of A36 Mild Steel by Taguchi Method

“…Pal S [8] used the Taguchi method to optimize parameters on PMIGW and the response measured were angular distortion, transversal shrinkage, bead geometry, deposition efficiency, and tensile strength. Analyzing distortions that occur can be applied using FEM [9], and the results show that the angular distortion can decrease due to temporary tacking.…”

Análise numérica de distorções em chapas finas soldadas por junta tipo t através de processo GMAW

“…Recentes trabalhos quanto à simulação numérica e busca para a predição das deformações na soldagem são concentrados em distorções de chapas paralelas ou grandes estruturas, exemplificando no trabalho de Zubairuddin et al (2017) que realizaram análise numérica com a soldagem multi passe de junta de chapas paralelas e obtiveram uma correlação de predição de distorção por meio do modelo numérico. Ma et al (2016) realizaram estudos numéricos quanto à predição de distorções em estruturas sujeitas às restrições temporárias e obtiveram boa correlação entre os resultados numéricos e experimentais.…”