Residual stress measurement in an extra thick multi-pass weld using initial stress integrated inherent strain method

Park, Jeong-Ung; An, Gyubaek; Woo, Wanchuck; Choi, Jae Hyun; Ma, Ninshu

doi:10.1016/j.marstruc.2014.10.002

Cited by 33 publications

(14 citation statements)

References 16 publications

(21 reference statements)

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“…There are very small compressive forces in the transverse edges of the plate. According to the finite element calculations of Kenno and Park [13,14], the distributions are similar while they observed that the thinner plate has slightly smaller tensile stress and slightly bigger compressive stress. The measurement of residual stress in welded plates requires costly equipment and qualified technicians.…”

Section: Introductionmentioning

confidence: 91%

Numerical Comparison of Cruciform weld and Butt weld simulation and a Study of Fracture Mechanics on Two Types of Welds

Bouchouicha

Malika²,

Chikh³

et al. 2019

Frattura Ed Integrità Strutturale

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The modeling of the welding is desirable to guess the deformation of the components during manufacture, the position and the magnitude of maximum residual stresses and to envisage metallurgical effects in specific zones. The welding are problems of complex modeling requiring the thermal and structural solutions. This has to lead to the development of several software packages and codes for simulation by finite elements. The welding condition, the properties of the structure and their interactions have significant influences on the thermal and structural responses (temperature history, distortion, and residual stress) in welded structures. This paper presents a finite element procedure for the prediction of welding-induced residual stresses and distortions. Comparison is made with tow numerical example. The first example is a butt welded joint of two plates, while the second is a Cruciform welded joint of two plates with four passes. Moreover, a comparison between the Cruciform weld and the butt-weld which we can obtain the parameters of the linear fracture mechanics; stress intensity factor K and energy release rate G.

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Section: Introductionmentioning

confidence: 91%

Numerical Comparison of Cruciform weld and Butt weld simulation and a Study of Fracture Mechanics on Two Types of Welds

Bouchouicha

Malika²,

Chikh³

et al. 2019

Frattura Ed Integrità Strutturale

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“…An et al [1,2] performed a large-scale brittle fracture test for various thicknesses in order to find out the factors affecting unstable fracture by applying high-heat input welding process and low-heat input welding process. In addition, they investigated the effect of residual stress on the unstable fracture by measuring residual stress distribution [3,4] according to each welding process. They found out that crack propagation path, which was generated during unstable fracture, was largely affected by the residual stress according to welding process.…”

Section: Introductionmentioning

confidence: 99%

“…In order to evaluate the generation and propagation of a crack, it is important to measure not only surface residual stress but also internal residual stress. Surface residual stress can be measured by X-ray method [5], hole drilling method [6], and so forth while internal residual stress can be measured by neutrons [7,8], deep-hole drilling [9,10], inherent strain [3,11], and contour method [12]. In this study, neutron method was used to measure internal residual stress in order to compare with the result of thermal elastoplastic FE analysis.…”

Section: Introductionmentioning

confidence: 99%

“…A welding residual stress prediction method by elasticity analysis was studied in order to resolve the issue of calculation time and the capacity of computer for thermal elastoplastic analysis. The representative method is the inherent strain method [3,11]. This method predicts residual stress and deformation by using inherent strain, which is the source of residual stress and deformation.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Welding-Pass Grouping on the Prediction Accuracy of Residual Stress in Multipass Butt Welding

Park

Kim

2017

Mathematical Problems in Engineering

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The residual stress analysis of a thick welded structure requires a lot of time and computer memory, which are different from those in thin welded structure analysis. This study investigated the effect of residual stress due to welding-pass grouping as a way to reduce the analysis time in multipass thick butt welding joint. For this purpose, the parametric analysis which changes the number of grouping passes was conducted in the multipass butt weld of a structure with a thickness of 25 mm and 70 mm. In addition, the residual stress by thermal elastoplastic FE analysis is compared with the results by the neutron diffraction method for verifying the reliability of the FE analysis. The welding sequence is considered in order to predict the residual stress more accurately when using welding-pass grouping method. The results of the welding-pass grouping model and half model occurred between the results of the left/right of the full model. If the total number of welding-pass grouping is less than half of that of welding pass, a large difference with real residual stress is found. Therefore, the total number of the welding-pass grouping should not be reduced to more than half.

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“…For large and complex welded structures applied in the marine, ship and aerospace fields, the models developed by the thermal elastic-plastic finite element method need to be divided into a large number of grids and time steps, which are not applicable in the actual work. Therefore, the inherent strain method is an alternative for estimating the overall welding distortions [13][14][15]. It is noted that the inherent strain method induces the transient effect of the welding process to inherent strain key parameters, avoiding the transient analysis of numerical simulation and the computational difficulty in high temperature, reducing the calculation time and obtaining the residual stress and deformation value with a certain degree of accuracy [16].…”

Section: Introductionmentioning

confidence: 99%

Welding Distortion Prediction in 5A06 Aluminum Alloy Complex Structure via Inherent Strain Method

Zeng

Yang

et al. 2016

Metals

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Finite element (FE) simulation with inherent deformation is an ideal and practical computational approach for predicting welding stress and distortion in the production of complex aluminum alloy structures. In this study, based on the thermal elasto-plastic analysis, FE models of multi-pass butt welds and T-type fillet welds were investigated to obtain the inherent strain distribution in a 5A06 aluminum alloy cylindrical structure. The angular distortion of the T-type joint was used to investigate the corresponding inherent strain mechanism. Moreover, a custom-designed experimental system was applied to clarify the magnitude of inherent deformation. With the mechanism investigation of welding-induced buckling by FE analysis using inherent deformation, an application for predicting and mitigating the welding buckling in fabrication of complex aluminum alloy structure was developed.

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Residual stress measurement in an extra thick multi-pass weld using initial stress integrated inherent strain method

Cited by 33 publications

References 16 publications

Numerical Comparison of Cruciform weld and Butt weld simulation and a Study of Fracture Mechanics on Two Types of Welds

Numerical Comparison of Cruciform weld and Butt weld simulation and a Study of Fracture Mechanics on Two Types of Welds

The Effect of Welding-Pass Grouping on the Prediction Accuracy of Residual Stress in Multipass Butt Welding

Welding Distortion Prediction in 5A06 Aluminum Alloy Complex Structure via Inherent Strain Method

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