Application of FEM simulation method in area of the dynamics of cooling AHSS steel with a complex hybrid welding process

Sajek, Adam

doi:10.1007/s40194-019-00718-z

Cited by 17 publications

(18 citation statements)

References 22 publications

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“…Welding leads to thermal cycles in the welded volume and heat affected zone, therefore, in some cases, kinematic hardening analysis should be applied, especially in fatigue situation [23][24][25].…”

Section: Mechanical Materials Propertiesmentioning

confidence: 99%

Comparison of Finite Element Methods in Fusion Welding Processes—A Review

Marques

Silva

Péreira

2020

Metals

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Currently, welding processes have become one of the most used methods for joining materials in all kinds of industries, thanks to properties such as high speed and high tensile strength. However, despite these advantages, this type of connection method has some drawbacks, for example, residual stress and structural distortion, mainly due to the process thermal cycles. Structural distortion is one of the major concerns of industrial joining practice. In order to decrease distortion, the variation of welding sequence, direction, and clamping conditions, have been applied through several years, by trial and error tests. However, numerical simulation enables virtual examination of the welding, mainly due to the progress on the numerical methods, which stimulated the research on welding simulation models. These models can cover a wide spectrum of physical and thermal processes occurring during, and after welding. The aim of this paper is to provide wider information about types of finite element method (FEM) in fusion welding processes and to demonstrate the accuracy of FEM models results compared to experimental.

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Section: Mechanical Materials Propertiesmentioning

confidence: 99%

Comparison of Finite Element Methods in Fusion Welding Processes—A Review

Marques

Silva

Péreira

2020

Metals

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“…There is much software that can perform finite element simulation of the welding process, such as SYSWELD, Simufact Welding, ANSYS, ABAQUS, etc. They can all simulate the welding process very well [22][23][24]. At the same time, software such as ANSYS can also simulate the multilayer structure very well [25].…”

Section: Introductionmentioning

confidence: 99%

Study on Residual Stress of Welded Hoop Structure

Zhang

Wang

et al. 2020

Applied Sciences

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Residual stress is inevitable during welding, which will greatly affect the reliability of the structure. The purpose of this paper was to study the residual stress of the hoop structure caused by the cooling shrinkage of the weld when the outer cylinder was wrapped and welded under the condition of the existing inner cylinder. In this paper, the “method of killing activating elements” of ANSYS was used to simulate the three-dimensional finite element of the hoop structure. In the case of applying interlayer friction, the welding-forming process and welding circumferential residual stress of the hoop structure were analyzed. The blind hole method was used to test the residual stress distribution of the hoop structure, and the test results were compared with the finite element simulation results to verify the reliability of the simulation calculation method and the reliability of the calculation results. Then, the influence factors of the maximum welding residual stress of the hoop structure were studied. The results show that the maximum residual stress of the outer plate surface of the hoop structure decreases with the increase of the welding energy, the thickness of the laminate, the width of the weld seam, the welding speed, and the radius of the container. Based on the results of numerical simulation, the ternary first-order equations of the maximum residual stress of the hoop structure with respect to the welding speed, the thickness of the laminate, and the width of the weld seam were established. Then, the optimal welding parameters were obtained by optimizing the equations, which provided an important basis for the safe use and optimal design of the welding hoop structure.

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“…The process is most often carried out with direct contact with water (wet welding) with the use of covered electrodes Wang et al, 2018). Water environment intensifies some problems that have a negative impact on weldability of steel, such as a rapid cooling rate (Guo et al, 2017;Tomków et al, 2018a;Sajek, 2019) and the presence of residual stresses (Aloraier et al, 2004;Hu et al, 2017;Han et al, 2019;Wang et al, 2019a;Wang et al, 2019b). The environment also has an impact by increasing the diffusible hydrogen content Chen et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Efecto del sistema de apantallamiento de la soldadura y el tiempo de almacenaje de los electrodos en el contenido de hidrógeno difundido en el metal depositado

et al. 2019

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In the study the glycerin displacement method was used for determination of diffusible hydrogen content in deposited metal. Specimens were welded in the air and in the water with covered rutile electrodes. The first part of the specimens was made immediately after opening the package of the electrodes. The electrodes were then stored in opened packages in laboratory conditions that allowed for contact with the air for three years. After that time, the second part of the samples was made. The results of the measurements of the diffusible hydrogen amount in deposited metal ranged from 32.61 to 39.95 ml/100 g for specimens welded in the air and from 51.50 to 61.34 ml/100 g for specimens made in the water. The statistical analyses were performed in a Statistical software package using the ANOVA module (one-way analysis of variance) with an assumed significance level α = 0.05. The assumption of normality was verified by the Shapiro-Wilk test. The homogeneity of variance was verified by the Levene test. In the next step, post-hoc analyzes were made. The aim was to determine which averages are significantly different. Scheffe, Tukey, NIR Fisher, Newman-Keuls and Duncan tests were used. Possible changes in the diffusible hydrogen content in deposited metal resulting from storage time of electrodes (3 years) were verified by Student's t-test. All of the statistical analysis shows that the storage time of the electrodes has no significant influence on the diffusible hydrogen content in deposited metal regardless of the welding environment.Citation/Citar como: Tomków, J., Fydrych, D., Rogalski, G., Łabanowski, J. (2019). "Effect of the welding environment and storage time of electrodes on the diffusible hydrogen content in deposited metal". Rev. Metal. 55(1): e140. https:// doi.org/10.3989/revmetalm.140

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Application of FEM simulation method in area of the dynamics of cooling AHSS steel with a complex hybrid welding process

Cited by 17 publications

References 22 publications

Comparison of Finite Element Methods in Fusion Welding Processes—A Review

Comparison of Finite Element Methods in Fusion Welding Processes—A Review

Study on Residual Stress of Welded Hoop Structure

Efecto del sistema de apantallamiento de la soldadura y el tiempo de almacenaje de los electrodos en el contenido de hidrógeno difundido en el metal depositado

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