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Research on a multidimensional strain energy estimation method for welding spots based on performance optimization

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Abstract

The modeling and optimization of welding spots have great effects on the stiffness performance of vehicles. To improve the traditional one-dimensional linear models that may lead to severe underestimation of the strain energy of welding spots, this paper proposes a multidimensional strain energy estimation model that considers the welding spots and adjacent elements as a whole and includes three principal stress directions. The model is verified by a U-shaped sample test. Based on the model, a method for evaluating welding spot contributions is constructed and applied to a light bus to optimize the positions of the welding spots of the body-in-white (BIW). After eight iterations of optimization, with the same number of welding spots, the frequencies of the first and second modes of the BIW are improved by 5.1% and 3.4%, respectively, while the static torsional stiffness and bending stiffness are increased by 3.2% and 1.2%, respectively.

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Funding

This work was supported by the National Key R&D Program of China (2018YFB0106200).

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Authors and Affiliations

  1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, 130022, China

    Haisheng Song, Changhai Yang, Kunheng Li & Zhiyong Chen

  2. Institute of Automotive Engineering R&D, Shaanxi Heavy Duty Automobile Co., Ltd, Xi’an, 710200, China

    Haisheng Song

  3. Technology Development Department, FAW-Volkswagen automotive Co., Ltd, Changchun, 130022, China

    Na Yang

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  1. Haisheng Song
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  2. Changhai Yang
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Song, H., Yang, C., Yang, N. et al. Research on a multidimensional strain energy estimation method for welding spots based on performance optimization. Int J Adv Manuf Technol 117, 1263–1273 (2021). https://doi.org/10.1007/s00170-021-07724-w

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  • DOI: https://doi.org/10.1007/s00170-021-07724-w

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