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A Simplified Anisotropic Yield Function not Requiring Parameter Optimization for Sheet Metals

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Abstract

Recently developed anisotropic yield functions can capture the material anisotropic behaviors through parameter optimization. However, sometimes the parameter optimization is not easy and does not always have a unique solution. This paper introduces an anisotropic yield function that does not require the parameter calibration process. This model simplifies the coupled quadratic and non-quadratic yield function in order to directly use the measured on-set of yielding stress and r-value data without the calibration process. The presented model is validated with five different materials for the prediction of stress and strain anisotropies. In addition, a cup drawing simulation is also presented to validate the simplified model in a practical metal forming simulation with the User-defined subroutine of ABAQUS. The results of this paper show that the simplified model can be effectively employed for the simulation of sheet metal forming processes.

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Acknowledgements

This work was supported by the Ministry of Trade, Industry & Energy (MOTIE, Korea) through the project (No. 20014530, Development of high-speed impact trimming press for cutting automotive parts of 1.6GPa-class ultra-high strength steel), funded by the Korea Government.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do, 16419, Republic of Korea

    Jae-Hyuk Lim & Eun-Ho Lee

  2. Department of Smart Fab. Technology, Sungkyunkwan University, Suwon, Gyeonggi-do, 16419, Republic of Korea

    Eun-Ho Lee

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  1. Jae-Hyuk Lim
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Correspondence to Eun-Ho Lee.

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Lim, JH., Lee, EH. A Simplified Anisotropic Yield Function not Requiring Parameter Optimization for Sheet Metals. Int. J. Precis. Eng. Manuf. 23, 67–78 (2022). https://doi.org/10.1007/s12541-021-00579-x

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  • DOI: https://doi.org/10.1007/s12541-021-00579-x

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