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Weld Bead Distortion of Thin-Plate Using Weak Digital Image Correlation Method

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Abstract

Currently, the primary method used to investigate weld bead distortions is based on finite element prediction. However, in this paper, we proposed a three-dimensional optical method based on weak digital image correlation technology to track the dynamic distortion of the weld bead throughout the welding and cooling process. An experimental investigation demonstrated that the weld bead zone was distorted into a dish shape during the welding process and changed into a saddle shape after cooling down. In the weld bead, the out-of-plate distortion was significantly larger than the in-plate distortion, and the longitudinal plastic strain distribution was small and uniform, whereas the transverse strain was larger. This optical experimental method could be useful in the validation of numerical models in the welding process and important to research on welding distortions.

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Acknowledgments

The authors acknowledge the support of the National Natural Science Foundation of China (Grant No. 51421004, 51275378, 51275389) and the Fundamental Research Funds for the Central Universities. Comments from the anonymous reviewers are also greatly appreciated.

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Authors and Affiliations

  1. State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an, 710049, Shanxi, China

    Nan Guo & Jin Liang

  2. State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an, 710049, Shanxi, China

    Xianqing Yin

  3. Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan

    Ninshu Ma

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  1. Nan Guo
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  2. Xianqing Yin
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  3. Jin Liang
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  4. Ninshu Ma
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Correspondence to Xianqing Yin.

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Guo, N., Yin, X., Liang, J. et al. Weld Bead Distortion of Thin-Plate Using Weak Digital Image Correlation Method. J. of Materi Eng and Perform 25, 4952–4958 (2016). https://doi.org/10.1007/s11665-016-2286-y

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  • DOI: https://doi.org/10.1007/s11665-016-2286-y

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