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Parameter Calibration of Xinjiang Paperbark Walnut Kernels by Discrete Element Simulation

Author

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  • Binnan Zhou

    (College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China)

  • Yi Zuo

    (College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China)

  • Lixia Hou

    (College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China)

Abstract

To solve the problem of the lack of an accurate model for mechanized transportation and grading of walnut kernels, this paper took the shelled walnut kernels as the research object and calibrated the parameters of the discrete element model of walnut cracking kernels with the discrete element simulation software EDEM. The physical parameters of cracking kernels were measured by experiments, and the Hertz–Mindlin model was used to simulate the repose angle of cracking kernels. The contact parameters, such as the particle collision recovery coefficient, the static friction coefficient, and the rolling friction coefficient, were determined by the two-level factor test, steepest ascent test, and response surface test, respectively. Subsequently, the Hertz–Mindlin model with bonding contact was exploited to conduct the simulation of cracking kernels bending test based on the calibrated contact parameters. Finally, the normal contact stiffness, tangential contact stiffness, critical tangential force, and normal force of cracking kernels were determined by response surface analysis. It was shown that the relative error between the simulated values and the experiment results was 3.00 ± 1.31%. These results indicated that the calibrated parameter values are reliable, and could be used for the mechanized transportation and grading of walnut kernels.

Suggested Citation

  • Binnan Zhou & Yi Zuo & Lixia Hou, 2023. "Parameter Calibration of Xinjiang Paperbark Walnut Kernels by Discrete Element Simulation," Agriculture, MDPI, vol. 13(2), pages 1-13, January.
  • Handle: RePEc:gam:jagris:v:13:y:2023:i:2:p:353-:d:1053204
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    References listed on IDEAS

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    1. Adilet Sugirbay & Guang-Rui Hu & Jun Chen & Zhasulan Mustafin & Marat Muratkhan & Ruslan Iskakov & Yu Chen & Shuo Zhang & Lingxin Bu & Yerassyl Dulatbay & Bauyrzhan Mukhamed, 2022. "A Study on the Calibration of Wheat Seed Interaction Properties Based on the Discrete Element Method," Agriculture, MDPI, vol. 12(9), pages 1-15, September.
    2. Yan Liu & Guopeng Mi & Shilin Zhang & Peng Li & Yuxiang Huang, 2022. "Determination of Discrete Element Modelling Parameters of Adzuki Bean Seeds," Agriculture, MDPI, vol. 12(5), pages 1-13, April.
    3. Hongcheng Li & Rong Zeng & Zhiyou Niu & Junqi Zhang, 2022. "A Calibration Method for Contact Parameters of Maize Kernels Based on the Discrete Element Method," Agriculture, MDPI, vol. 12(5), pages 1-17, May.
    4. Guopeng Mi & Yan Liu & Tao Wang & Jianxin Dong & Shilin Zhang & Qiwei Li & Kezhou Chen & Yuxiang Huang, 2022. "Measurement of Physical Properties of Sorghum Seeds and Calibration of Discrete Element Modeling Parameters," Agriculture, MDPI, vol. 12(5), pages 1-21, May.
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    Cited by:

    1. Hao Zhou & Kangtai Li & Zhiyu Qin & Shengsheng Wang & Xuezhen Wang & Fengyun Sun, 2024. "Discrete Element Model of Oil Peony Seeds and the Calibration of Its Parameters," Agriculture, MDPI, vol. 14(7), pages 1-13, July.

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