Stress intensity factor-based prediction of solidification crack growth during welding of high strength steel

Chen, Zhanglan; Xiong, Yi; Qiu, Haijun; Lin, Guo-Zhen; Li, Zongmin

doi:10.1016/j.jmatprotec.2017.09.031

Cited by 16 publications

(12 citation statements)

References 27 publications

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“…The combination of tensile residual stresses and tensile stresses because of the workloads in the area of the welded joint can accelerate fatigue crack nucleation and growth, brittle fractures, or stress corrosion cracking. 1,2 The deformations of the structure because of welding lead to dimensional inaccuracies of the structural components and can cause serious problems during its assembly. The elimination of these consequences by conventional mechanical 3,4 or thermal procedures 5,6 requires additional production time and financial costs, and it is often impossible to do because of the large structure dimensions.…”

Section: Discussionmentioning

confidence: 99%

“…The inevitable and harmful consequence of the large heat input is the occurrence of residual stresses within the structure, its permanent plastic deformation as well as the changes of the crystal structure in the weld seam and in the area close to the weld. The combination of tensile residual stresses and tensile stresses because of the workloads in the area of the welded joint can accelerate fatigue crack nucleation and growth, brittle fractures, or stress corrosion cracking . The deformations of the structure because of welding lead to dimensional inaccuracies of the structural components and can cause serious problems during its assembly.…”

Section: Introductionmentioning

confidence: 99%

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Numerical prediction and experimental validation of temperature and residual stress distributions in buried‐arc welded thick plates

et al. 2019

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Summary The paper deals with the numerical simulation and experimental investigations of a buried‐arc welding process on a butt‐welded plate sample. In the numerical investigations, the finite element analysis is carried out by applying the element birth and death technique in the thermal analysis, while the mechanical analysis is performed simultaneously in one step to reduce simulation time. The temperature history at two locations is recorded with thermocouples, while residual stresses are measured by using the hole‐drilling stress relaxation method at four points. The heat input efficiency for the buried‐arc welding process is determined by using a parametric analysis. The numerically obtained temperatures and residual stresses correspond very well with the experimental measurements. Furthermore, by using buried‐arc welding, 73% of the weld filler material is saved and 59% of energy, whereas the CO2 emission to the atmosphere is reduced by 83% in comparison with conventional metal active gas welding for a model of the same dimensions.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical prediction and experimental validation of temperature and residual stress distributions in buried‐arc welded thick plates

et al. 2019

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“…The obtained numerical deflection corresponds very well with the experimental measurement. Figure 8 shows the longitudinal residual stress profile (σz, stress in z-direction) at the middle plane of the horizontal plate along the A-B line ( Figure 1) compared with two analytical solutions from Equations (1) and (2). It can be seen that tensile residual stresses are in the weld area, while in the rest of the model they are compressive.…”

Section: Residual Stress and Deflection Distributions-reference Modelmentioning

confidence: 99%

“…The large localized heat generation during welding and subsequent very fast cooling of the melted material to ambient temperature have, as a consequence, the occurrence of permanent residual stresses and dimensional imperfections in the welded structure. Such imperfections can cause large inconveniences during the structure assembly, while high residual stresses can have a detrimental impact on its integrity and durability [1][2][3][4]. The elimination of these consequences using conventional post-weld thermal or mechanical treatments requires an extended production time and incurs additional financial expenses.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Longitudinal Residual Stresses and Deflections in a T-joint Welded Structure Using a Local Preheating Technique

et al. 2018

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In this paper a numerical analysis of a T-joint fillet weld is performed to investigate the influences of different preheat temperatures and the interpass time on the longitudinal residual stress fields and structure deflections. In the frame of the numerical investigations, two thermo-mechanical finite element models, denoted M2 and M3, were analyzed and the results obtained were then compared with the model M1, where the preheating technique was not applied. It is concluded that by applying the preheat temperature prior to the start of welding the post-welding deformations of welded structures can be significantly reduced. The increase of the preheat temperature increased the longitudinal residual stress field at the ends of the plates. The influence of the interpass time between two weld passes on the longitudinal residual stress state and plate deflection was investigated on two preheated numerical models, M4 and M5, with an interpass time of 60 s and 120 s, respectively. The results obtained were then compared with the preheated model M3, where there was no time gap between the two weld passes. It can be concluded that with the increase of interpass time, the plate deflections significantly increase, while the influence of the interpass time on the longitudinal residual stress field can be neglected.

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“…Localised heat generation during welding and subsequent rapid cooling lead to the permanent geometrical imperfections of structures and to welding residual stress occurrences [1]. The geometrical imperfections often cause serious problems during assembly while the residual stresses can contribute to fatigue crack initiations, brittle fractures or stress corrosion cracking [2][3][4][5]. The elimination of these consequences requires additional financial costs and it is often impossible due to the large structure dimensions.…”

Section: Introductionmentioning

confidence: 99%

A simplified engineering method for a T-joint welding simulation

et al. 2018

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In the framework of this study, a hybrid sequential thermo-mechanical finite element analysis of T-joint fillet welding is performed. In the thermal analysis, the element birth and death technique is applied to simulate a weld filler deposition, while a mechanical analysis is performed simultaneously to avoid possible problems due to large displacements induced by large strains. The calculated plate deflections are compared with the experimental measurements while the obtained residual stresses are compared with the analytical solution from the literature. The simulated results demonstrate that the proposed method can be effectively used to predict the residual stresses and distortions induced by the T-joint welding of two plates.

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Stress intensity factor-based prediction of solidification crack growth during welding of high strength steel

Cited by 16 publications

References 27 publications

Numerical prediction and experimental validation of temperature and residual stress distributions in buried‐arc welded thick plates

Numerical prediction and experimental validation of temperature and residual stress distributions in buried‐arc welded thick plates

Numerical Analysis of Longitudinal Residual Stresses and Deflections in a T-joint Welded Structure Using a Local Preheating Technique

A simplified engineering method for a T-joint welding simulation

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