A study on the effect of welding sequence in fabrication of large stiffened plate panels

Biswas, Pankaj; Kumar, D. Anil; Mandal, Nirupama; Mahapatra, Manas Mohan

doi:10.1007/s11804-011-1088-8

Cited by 25 publications

(9 citation statements)

References 8 publications

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“…e total strain can then be decomposed into the three following components [27]: where ε th , ε e , and ε pl are the thermal strain, elastic strain, and plastic strain, respectively. Figure 8 is the flow chart of the mechanical analysis for predicting the welding deformation and residual stress [28,29] of the welded butt joints in the present study, where σ is the stress vector and D is the stiffness matrix.…”

Section: Mechanical Analysismentioning

confidence: 99%

Effect of Welding Sequence and Constraint on the Residual Stress and Deformation of Thick Welded Butt Joint Made of Q345qD Steel

Zhang¹,

Dong³

et al. 2022

Advances in Civil Engineering

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In this paper, the residual stress and deformation of 32 mm thick welded butt joints made of Q345qD steel using gas metal arc welding (GMAW) are studied by using the thermoelastic-plastic finite element analysis (FEA). Element birth and death technique is used to simulate the deposition of the welding consumables, and the volume heat source in double-ellipsoidal distribution is used. An in-house python code is developed to enable the volume heat source movement. After the finite element model was verified against the experimental results, the effects of five welding sequences and two types of boundary constraint conditions on the residual stress and deformation of the thick welded butt joints were investigated. Results of the experimental measurement and the numerical simulation are in good agreement. The transverse residual stress and the vertical deformation can be significantly reduced by increasing the alternating times of the welding beads in two halves of the weld. The transverse residual stress and the vertical deformation can be reduced by 21.4% and 87.4%, respectively. In addition, the residual stress and deformation of the thick welded butt joints are significantly affected by the applied constraints. Increasing the constraint significantly increases the overall level of the transverse residual stress but can decrease the maximum longitudinal residual stress by 51.8% and the vertical deformation by 65.9%.

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Section: Mechanical Analysismentioning

confidence: 99%

Effect of Welding Sequence and Constraint on the Residual Stress and Deformation of Thick Welded Butt Joint Made of Q345qD Steel

Zhang¹,

Dong³

et al. 2022

Advances in Civil Engineering

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show abstract

“…Therefore, selection of the optimal welding sequence is a simple and more efficient approach for reduction of welding distortion. The conventional approach is to select the relatively good sequence schemes with reasonable weld arrangement using TEP-FEM analysis, which often does not offer an optimal sequence 27,28) .…”

Section: Optimization Of Welding Sequencementioning

confidence: 99%

Review on Mitigation of Welding-Induced Distortion Based on FEM Analysis

Kim

2020

Journal of Welding and Joining

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Welding distortion is an unavoidable issue due to localized expansion and contraction during the heating and cooling cycles, and has a negative effect on the fabrication process. However, mitigating weld distortion to meet product requirements is a challenging task, because welding shrinkage can't be prevented, only controlled. This paper provides a comprehensive literature review of various techniques to reduce and optimize the deformation induced by welding in the design stage and manufacturing process. Finite element numerical analysis methods are usually employed to predict welding distortion, and can cost less than actual experiments. The review of these approaches is useful to fully understand the main mechanisms used to mitigate weldinginduced distortion, and for choosing the most suitable method to minimize deformation based on realistic fabrication requirements.

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“…14,15 After that, research was conducted about both-side welding and single-side welding, welding jig, and arbitrary welding sequence for large-sized thin plate panel structure. 16–18 A three-dimensional (3D) finite element approach based on commercial code was developed to investigate the effect of welding sequence on welding residual stress distribution in a thin-walled aluminum alloy structure 19 and in T-joint welded structure. 20 Selecting a suitable welding sequence can reduce the final residual stress and leads to high-performance, low-distortion assemblies which can ultimately be manufactured at the lowest possible cost.…”

Section: Introductionmentioning

confidence: 99%

Effect of welding sequence to minimize fillet welding distortion in a ship’s small component fabrication using joint rigidity method

Park

2015

Proceedings of the Institution of Mechanical Engineers, Part B:

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This study was performed to investigate the effect of welding sequence on fillet welding distortion. It proposes a new model of joint rigidity method, which can determine the welding sequence for minimum welding distortion, through a reliability validation done via experiments and welding distortion analysis using the equivalent load method. A new joint rigidity method considers the gap between base plate and stiffener and the fillet welding sequence at left/right bead. Fillet welding sequence at left/right bead could be considered by setting welding beads at left/right as a separate solid element after welding sequence was drawn by new joint rigidity method. Analysis and experiment for welding distortion for the test specimen with different stiffener distances were conducted. It was confirmed that the experimental and analysis results were well-matched. The validity of welding sequence using joint rigidity method was followed after the comparison of the welding distortion for the small components for ship building. Note that the welding sequence by which welding distortion became maximum and minimum was drawn using joint rigidity method for the small assembly components. Welding distortion was also analyzed using equivalent load method. Analysis results revealed that the maximum welding distortion less than 10 mm was generated. Welding distortion less than around 5 mm occurred in welding sequence which minimized welding distortion compared with welding sequence, generating maximum welding distortion.

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A study on the effect of welding sequence in fabrication of large stiffened plate panels

Cited by 25 publications

References 8 publications

Effect of Welding Sequence and Constraint on the Residual Stress and Deformation of Thick Welded Butt Joint Made of Q345qD Steel

Effect of Welding Sequence and Constraint on the Residual Stress and Deformation of Thick Welded Butt Joint Made of Q345qD Steel

Review on Mitigation of Welding-Induced Distortion Based on FEM Analysis

Effect of welding sequence to minimize fillet welding distortion in a ship’s small component fabrication using joint rigidity method

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