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Springback Prediction Model Considering the Variable Young’s Modulus for the Bending Rectangular 3A21 Tube

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Abstract

Springback is inevitable for thin-walled rectangular 3A21 tube in rotary-draw bending process, and Young’s modulus is a crucial material property parameter affecting springback simulation. Therefore, to improve the springback prediction precision, the variation of Young’s modulus with plastic deformation for 3A21 material is studied through a repeated loading-unloading experiment, and a piecewise linear function is given out to describe the relationship between Young’s modulus and plastic strain, which is considered into a new material constitutive model combined with the Von-Mises yield function and the Swift isotropic hardening rule. Furthermore, a finite element springback prediction model is established by means of this new constitutive model for rotary-draw bending process of thin-walled rectangular 3A21 tube, and its reliability is validated experimentally. Comparisons between simulation results and experimental data show that, the accuracy of springback prediction can be improved significantly by 18.02% when the variation of Young’s modulus is considered. On the basis of the established model, the stress distribution field of thin-walled rectangular 3A21 tube in the whole rotary-draw bending process is obtained and analyzed.

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Acknowledgments

The research is supported by the National Natural Science Foundation of China (Nos. 50575184 and 50975235), NPU Foundation for Fundamental Research (No. NPU-FFR-200809) and 111 Project (No. B08040).

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Authors and Affiliations

  1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, 710072, China

    Y. L. Liu, Y. X. Zhu, W. Q. Dong & H. Yang

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  1. Y. L. Liu
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  2. Y. X. Zhu
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  3. W. Q. Dong
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  4. H. Yang
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Correspondence to Y. L. Liu.

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Liu, Y.L., Zhu, Y.X., Dong, W.Q. et al. Springback Prediction Model Considering the Variable Young’s Modulus for the Bending Rectangular 3A21 Tube. J. of Materi Eng and Perform 22, 9–16 (2013). https://doi.org/10.1007/s11665-012-0227-y

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  • DOI: https://doi.org/10.1007/s11665-012-0227-y

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