Study on deformation and residual stress of laser welding 316L T-joint using 3D/shell finite element analysis and experiment verification

Rong, Youmin; Zhang, Guojun; Huang, Yu

doi:10.1007/s00170-016-9246-4

Cited by 31 publications

(16 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many studies have been undertaken to improve the solution efficiency of thermal elasto-plastic finite element analysis with regard to welding phenomena. Reducing the number of nodes using 3D/shell elements reduces the simulation time [5][6][7]. Murakawa et al [8] proposed an iterative substructure method (ISM) to reduce the simulation time.…”

Section: Introductionmentioning

confidence: 99%

A Study on Minimizing Welding Deformation of Joints for the Sealing of Emission After-Treatment Structure

Kang

Yun

Kim³

et al. 2021

Materials

View full text Add to dashboard Cite

As the environmental pollution issue has recently become significant, environmental regulations in Europe and the United States are being strengthened. Thus, there is a demand for the quality improvement of emission after-treatment systems to satisfy the strengthened environmental regulations. Reducing the amount of welding heat distortion by optimization of the welding order of each part could be a solution for quality improvement since the emission after-treatment system consists of many parts and each assembly is produced by welding individual ones. In this research, a method to derive a welding sequence that effectively minimizes welding deformation was proposed. A two-stage simulation was performed to obtain the optimal welding sequence. In the first stage, the welding sequence was derived by analyzing the number of welding groups in each assembly of a structure. The derived welding sequence was verified by performing a thermal elasto-plastic analysis and comparing it with the experimental results.

show abstract

Section: Introductionmentioning

confidence: 99%

A Study on Minimizing Welding Deformation of Joints for the Sealing of Emission After-Treatment Structure

Kang

Yun

Kim³

et al. 2021

Materials

View full text Add to dashboard Cite

show abstract

“…On the other hand, Ma et al [18,19] proposed an accelerated explicit FEM for analysis of transient welding deformation and residual stress in large construction structures and automotive parts. Rong et al [20] proposed a shell and 3D thermal mechanical model for effective prediction of laser welding-induced residual stress and distortion in 316L T-joint. Deng and Murakawa [21] combined the thermo-elastic–plastic FEM and the large deformation elastic FEM to predict the welding distortion of practical structures.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis and In-Situ Measurement of Out-of-Plane Distortion in Thin Plate TIG Welding

et al. 2019

View full text Add to dashboard Cite

Transient distortion of thin plate in the welding process usually has a complicated mode and large magnitude. Quantitative measurement and prediction of full-field distortion are challenging and rarely reported up to now. In this study, the out-of-plane distortion of a thin plate during the Tungsten Inert Gas (TIG) welding process was measured using the digital image correlation (DIC) method. A simulation model based on thermal elastic–plastic finite element method (FEM) and DIC measured geometric imperfection were developed for accurate prediction of the transient welding distortion. The numerical results and experimental data agreed very well in both out-of-plane deformation modes and magnitudes of the plate at different stages of welding. The maximum out-of-plane distortion was larger than 4 mm during welding which can cause instability of arc length and heat input. The distance change between welding torch and plate surface was investigated under different initial deflections of the plate before welding. The plate with flat geometry shows the minimum transient and final gap change. In addition, the relationship between heat input and welding distortion was clarified through a series of numerical analyses. Optimization of welding heat input can be performed based on numerical results to avoid excessive welding distortion.

show abstract

“…Kim et al [14] investigated the effect of the phase transformation on the generation of welding distortions and stresses of LBW and HYBW using finite element simulation. Rong et al [15] studied the deformation and residual stress of the laser welding 316L T-joint using finite element simulation. In addition, the optimization of welding sequences has become more popular for controlling welding stresses and distortions using finite element models.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Effect of Tungsten Inert Gas Welding Sequences on Residual Stress and Distortion of CFETR Vacuum Vessel Using Finite Element Simulations

Zhang

Liu

et al. 2018

Metals

View full text Add to dashboard Cite

The as-welded sectors of China Fusion Engineering Testing Reactor (CFETR) vacuum vessel (VV) have very tight tolerances. However, it is difficult to investigate the welding stress and distortion without the production of a full-scale prototype. Therefore, it is important to predict and reduce the welding stress and distortion to guarantee the final assembly by using an accurately adjusted finite element model. In this paper, a full-scale finite element model of the 1/32 VV mock-up was built by ABAQUS which is a powerful finite element software for engineering simulation, and three different tungsten inert gas (TIG) welding sequences were simulated to study the effect of welding sequences on the welding stress and distortion. The results showed that the main welding stress happened on the weld zone, and the maximum distortion occurred on the shell near the welding joints between the inboard segment (PS1) and the lower segment (PS4). The inboard segment (PS1), upper segment (PS2), and lower segment (PS4) distorted to inside of the shell perpendicularly, while the equatorial segment (PS3) distorted to outside of the shell perpendicularly. According to the further analysis, the maximum welding stresses in sequence 1, sequence 2, and sequence 3 were 234.509 MPa, 234.731 MPa, and 234.508 MPa, respectively, and the average welding stresses were 117.268 MPa, 117.367 MPa, and 117.241 MPa, respectively, meanwhile, the maximum welding displacements in sequence 1, sequence 2, and sequence 3 were 1.158 mm, 1.157 mm, and 1.149 mm, respectively, and the average welding displacements were 1.048 mm, 1.053 mm, and 1.042 mm, respectively. Thus, an optimized welding sequence 3 was obtained and could be applied to the practical assembly process of the 1/32 VV mock-up.

show abstract

Study on deformation and residual stress of laser welding 316L T-joint using 3D/shell finite element analysis and experiment verification

Cited by 31 publications

References 23 publications

A Study on Minimizing Welding Deformation of Joints for the Sealing of Emission After-Treatment Structure

A Study on Minimizing Welding Deformation of Joints for the Sealing of Emission After-Treatment Structure

Finite Element Analysis and In-Situ Measurement of Out-of-Plane Distortion in Thin Plate TIG Welding

Analysis of the Effect of Tungsten Inert Gas Welding Sequences on Residual Stress and Distortion of CFETR Vacuum Vessel Using Finite Element Simulations

Contact Info

Product

Resources

About