Fast Prediction for Resistance Spot Welding Deformation Using Inherent Strain Method and Nugget Model

Chino, Takeshi; Kunugi, Atsushi; Kawashima, Toshikazu; Watanabe, Goro; Chun-xiao, Cao; Ma, Ninshu

doi:10.3390/ma14237180

Cited by 8 publications

(2 citation statements)

References 32 publications

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“…Zhou, Hong [16,17] et al combined the thermoelastic-plastic finite element method with the inherent deformation finite element method, accurately predicted the out-of-plane buckling behavior of typical marine plate girder welded structure with ortho-cross reinforcement, and studied the influence of welding sequence on the outward welding deformation. Chino T [18] et al used the inherent strain method to quickly predict the deformation of resistance spot welding, and effectively predicted the deformation of automobile parts with 23 resistance spot welding within about 90 min. Compared with the test measurement, the prediction model has good accuracy.…”

Section: Introductionmentioning

confidence: 99%

Influence of Initial Structural Dimensions of Plates on Welding Distortion

Guo,

Zhang,

Tang

et al. 2023

Coatings

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Aiming at the complex full-field deformation problem that easily occurs when welding plates, this paper adopts the elastic–plastic finite element method with heat-force coupling to study the deformation law of plates in different initial states. First, a rectangular plate finite element model with an initial radius and Gaussian heat source model was established to obtain the welding temperature field and deformation field of the plate; then, the method based on digital image correlation technology was used to detect the full-field dynamic deformation of the plate to verify the accuracy of the finite element model; finally, the influence of the initial structural dimensions of the plate on the weld deformation was investigated. The study shows the following: the thermoelastic–plastic finite element model proposed in this paper has high accuracy in both static and dynamic deformation; plates with the same curvature, and different lengths and widths of the initial structure of the plate welding deformation are saddle-shaped, and the edge effect of the welding of the plate is evident, independent of the length of the plate; and the maximum out-of-face deformation of the welding of the plate is linearly related to the length and the closer the aspect ratio of the plate is to 1, the smaller the out-of-face deformation is.

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Section: Introductionmentioning

confidence: 99%

Influence of Initial Structural Dimensions of Plates on Welding Distortion

Guo,

Zhang,

Tang

et al. 2023

Coatings

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“…Experimental validation demonstrated the feasibility and high efficiency of the immune clonal algorithm in double-sided welding sequence optimization. Chino et al [20] employed the inherent strain method for the fast and efficient prediction of welding deformation in an automotive component with 23 resistance spot welds, demonstrating good reliability and accuracy compared to the actual measurement.…”

Section: Introducementioning

confidence: 99%

Numerical Simulations and Experimental Verification of T-Structure Welding Deformation Using the Step-by-Step Loading Inherent Strain Method

Wang

Miao

et al. 2023

Metals

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The existing inherent strain method is improved in this paper to address the shortcomings of the existing inherent strain method in the process of loading inherent strain. Unlike the traditional inherent strain method, which uses one-step loading inherent strain for each weld seam for one-time elastic calculation, the improved inherent strain method uses step-by-step loading inherent strain for each weld seam for multiple elastic calculations to predict welding deformation. The step-by-step loading inherent strain method (SBS-ISM) is more in line with the actual welding deformation generation process. Firstly, the local finite element model of the T-joint was used to analyze the welding deformation and extract the inherent strain by using the thermal elastic–plastic finite element method (TEP-FEM). Subsequently, the one-step loading inherent strain method (OS-ISM) and the step-by-step loading inherent strain method (SBS-ISM) were used to predict the welding deformation for the same local finite element model, respectively. The comparative results showed that the trend and magnitude of welding deformation calculated using SBS-ISM was much closer to those calculated using TEP-FEM. The OS-ISM and SBS-ISM were used to predict the welding deformation of the backward centrifugal fan impeller under different welding sequences, respectively. By comparing the welding deformation results calculated using the two inherent strain methods with the experimental results, it was demonstrated that the step-by-step loading inherent strain method (SBS-ISM) provides more accurate and reliable predictions of welding deformation for large and complex thin-walled T-shaped structural components compared to the one-step loading inherent strain method (OS-ISM).

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