Calibration and Testing of Discrete Elemental Simulation Parameters for Pod Pepper Seeds

Xingye Chen, Jing Bai, Xinzhong Wang (), Weiquan Fang, Tianyu Hong, Nan Zang, Liangliang Fang and Gaoliang Wang
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Xingye Chen: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Jing Bai: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Xinzhong Wang: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Weiquan Fang: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Tianyu Hong: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Nan Zang: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Liangliang Fang: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Gaoliang Wang: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China

Agriculture, 2024, vol. 14, issue 6, 1-14

Abstract: The discrete elemental parameters of pod pepper seeds were calibrated for future numerical optimization of the pod pepper seed cleaning device. The study concentrates on calibrating the intrinsic and contact parameters of pod pepper seeds utilizing the discrete element method. Compression tests were performed to ascertain intrinsic parameters such as Poisson’s ratio and the seeds’ elastic modulus. The static friction coefficient and collision restitution coefficient between the seeds and steel plates were identified through incline and free-fall tests. Plackett–Burman, steepest ascent, and Box–Behnken experiments were performed to establish a second-order regression model correlating significant parameters with the angle of repose. The optimal parameter combination, based on the measured angle of repose (32.45°), yielded static friction coefficients between seeds, rolling friction coefficients between seeds, and static friction coefficients between seeds and steel plates of 0.608, 0.018, and 0.787, respectively. The two-sample t-test of the physical and simulated repose angles yielded p > 0.05, and the relative error of the physical and simulated repose angles was 0.68%, which confirmed the reliability of the calibration parameters. The findings indicate that the calibration method for pod pepper seeds effectively informs the calibration of parameters for other irregular crops.

Keywords: discrete element; pod pepper seeds; repose angle; parameters; optimization (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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