Welding deformation analysis based on improved equivalent strain method considering the effect of temperature gradients

Kim, Taejun; Jang, Beom-Seon; Kang, Seok Joo

doi:10.1515/ijnaoe-2015-0012

Cited by 33 publications

(21 citation statements)

References 2 publications

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“…Due to this mechanism, tensile residual stress ultimately remains in the weld. The equivalent strain method based on inherent strain has been proposed to implement such a mechanism and has been used by various researchers to study welding characteristics [20,21].…”

Section: Inherent Strain Methodsmentioning

confidence: 99%

Welding Deformation Analysis, Using an Inherent Strain Method for Friction Stir Welded Electric Vehicle Aluminum Battery Housing, Considering Productivity

et al. 2019

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With the rise of electric vehicles, the use of battery modules, which are key units that drive vehicles, is increasing. The battery housing is the final form of a battery system mounted on electric vehicles, and is generally made of aluminum alloys, located at the bottom of the vehicle. The aluminum housing has a special shape to accommodate the battery module and is produced by welding extruded panels. This study applied friction stir welding (FSW) to weld 2.5 mm thin aluminum plates in order to improve the weldability and productivity. To increase productivity, we compared the mechanical properties after performing experiments under various FSW conditions. As a result, it was possible to derive speed-enabling welding conditions that can improve productivity without decreasing tensile strength. Deformation occurred in the structure during welding, causing gaps in the structure. Since these gaps have a significant influence on the degradation of mechanical properties after welding, the welding deformation at each step of welding must be calculated and reflected in the process. This study used the inherent strain method to calculate the deformation of each step of welding to apply automatic welding, and reduced the analysis time to 1/30 compared to the thermal elasto-plastic analysis method. Finally, this study verified the validity of the analysis method by comparing the experimental results with the numerical results using the inherent strain method. validation, S.K. and K.L.; formal analysis, S.K.; investigation, S.K. and Y.J.; resources, S.K. and K.L.; data curation, S.K. and K.L.; writing-original draft preparation, S.K.; writing-reviewing and editing, Y.J. and K.L.; visualization, S.K.; supervision, K.L.; project administration, K.L.; funding acquisition, K.L.

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Section: Inherent Strain Methodsmentioning

confidence: 99%

Welding Deformation Analysis, Using an Inherent Strain Method for Friction Stir Welded Electric Vehicle Aluminum Battery Housing, Considering Productivity

et al. 2019

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“…When moving backwards to the welded seams, the stress decayed. When the weldment exceeded a certain length, the longitudinal and transverse inherent strain coefficients were insignificantly changed except for the arc initiation and closing positions [22]. The influence of the weld length on the W3 and W4-welded seams was Figure 4 explains the distribution of longitudinal and transverse residual plastic strains of the butt joint.…”

Section: Inherent Strain Analysis Of Butt Weld and Fillet Weldsmentioning

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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“…For the definition of locked-up stresses numerical modelling, static methods, hypothesis of flat sections [1][2][3][4][5][6][7][8][9][10] is used.…”

Section: Introductionmentioning

confidence: 99%

“…Settlement-experimental methods have found wide application: a variation with use of the common decisions of the theory of elasticity and experimental data of nondestructive tests [3,7,8]; a finite element method with use of self-regulation [3,6,9], measurements by methods of neutron and x-ray diffraction [10], experimental data about distribution of temperatures and phase transformations during welding [1,2,4,8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Definition of Locked-up Stresses around a Rectilinear Welding Seam

Великанов

Koryagin

Sharkov

2016

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. In article one of the ways of modelling of the locked-up stresses caused by imposing of a welding seam in a plate is described. These stresses are caused by residual deformations of welding seams. In the settlement scheme the welding seam is presented in the form of an element by the thickness equal to the thickness of a plate, inserted in it with a longitudinal and cross-section tightness. The field of locked-up stresses around the welding seam experiences longitudinal and cross-section shrinkage under cooling and it is defined in work with the use of complex potentials of the theory of elasticity.

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Welding deformation analysis based on improved equivalent strain method considering the effect of temperature gradients

Cited by 33 publications

References 2 publications

Welding Deformation Analysis, Using an Inherent Strain Method for Friction Stir Welded Electric Vehicle Aluminum Battery Housing, Considering Productivity

Welding Deformation Analysis, Using an Inherent Strain Method for Friction Stir Welded Electric Vehicle Aluminum Battery Housing, Considering Productivity

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

Definition of Locked-up Stresses around a Rectilinear Welding Seam

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