Study on the Contact Parameter Calibration of the Maize Kernel Polyhedral Discrete Element Model

Huhu Chen, Haipeng Lin, Xuefeng Song (), Fengwei Zhang, Fei Dai, Ting Yang and Baicheng Li
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Huhu Chen: College of Mechanical and Electrical Engineering, Gansu Agriculture University, Lanzhou 730070, China
Haipeng Lin: College of Mechanical and Electrical Engineering, Gansu Agriculture University, Lanzhou 730070, China
Xuefeng Song: College of Mechanical and Electrical Engineering, Gansu Agriculture University, Lanzhou 730070, China
Fengwei Zhang: College of Mechanical and Electrical Engineering, Gansu Agriculture University, Lanzhou 730070, China
Fei Dai: College of Mechanical and Electrical Engineering, Gansu Agriculture University, Lanzhou 730070, China
Ting Yang: Gansu Aokai Agricultural Product Drying Equipment Engineering Research Institute Co., Ltd., Lanzhou 730030, China
Baicheng Li: Gansu Aokai Agricultural Product Drying Equipment Engineering Research Institute Co., Ltd., Lanzhou 730030, China

Agriculture, 2024, vol. 14, issue 9, 1-15

Abstract: During maize production and transportation, maize kernels frequently interact with mechanical components. To accurately simulate the interaction process between maize and mechanical components, it is essential to establish a reliable maize kernel model and input precise contact parameters. This study established polyhedral discrete element models of different maize kernels and calibrated the contact parameters between maize kernels and steel plates using the inclined plane method. The coefficients of restitution, static friction, and dynamic friction between maize and steel sheets were measured to be 0.5, 0.545, and 0.213, respectively. Subsequently, the contact parameters between maize kernels were determined through steepest climb tests and central composite design response surface tests. Then, the above parameters were optimized using Design-Expert software. The coefficients of restitution, static friction, and dynamic friction between maize kernels were measured to be 0.318, 0.182, and 0.232, respectively. Finally, the optimized parameters were validated using the angle of repose experiment, which found that the relative error between the experiment and the simulation was only 1.24%. The results indicated that the obtained contact parameters were accurate and reliable.

Keywords: maize kernels; polyhedron; discrete element method; parameter calibration (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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