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Effect of bending radius on deformation behavior of H62 brass tubes in a less constrained free bending process

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Abstract

Finite element method and bending experiments were carried out to survey the influence of bending radius on forming quality of H62 brass tubes in free bending process，which are widely used as key components of pipeline system in aerospace, aviation and automotive fields. Different bending radiuses ranged from 45 mm to 100 mm with an interval of 5 mm were employed to survey the forming defects. The results illustrated that both cross-section distortion and wall thickness variations at sections with angles in range of 10–20° and 160–170° were larger than other regions. The severe deformation behaviors usually occurred at the end of the tubes. Moreover, similar to the variation tendency of cross-section distortion, the changing of wall thickness decreases gradually with the increase of bending radius. Furthermore, the positions with the severer forming defects gradually moved towards to two terminals of the tubes with increasing bending radius. The variations of these deformation behaviors were mainly caused by the tangential stress and axial stress which were decomposed by an extra thrust introduced by the bending die. Based on the above force analysis and experimental results, the credible analytical equations were derived to quantify the effect of bending radius on forming precision during the practical bending process.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. U1937206), the Natural Science Foundation of Jiangsu Province (No. BK20211568), the Project Funded by China Postdoctoral Science Foundation (No. 2019 M661826), and the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, and the NUAA Innovation Program for Graduate Education (KYCX19_0181).

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Authors and Affiliations

  1. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 29 Yudao St., Nanjing, 210016, People’s Republic of China

    Jiawei Jiang, Xunzhong Guo, Yizhou Shen, Yangjiangshan Xu, Zhen Wang & Jie Tao

  2. Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing Institute of Technology, No. 1, Hongjing Avenue, Jiangning District, Nanjing, 211167, China

    Huaguan Li & Jie Tao

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  1. Jiawei Jiang
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Jiang, J., Guo, X., Shen, Y. et al. Effect of bending radius on deformation behavior of H62 brass tubes in a less constrained free bending process. Int J Mater Form 16, 50 (2023). https://doi.org/10.1007/s12289-023-01774-z

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