Calibration of Discrete Elemental Contact Parameters of Tobacco and Its Breakage Model Construction
Journal Title: Journal of Shenyang Agricultural University - Year 2025, Vol 56, Issue 1
Abstract
[Objective]In view of the lack of discrete element contact parameters and breakage model of tobacco in the particle simulation, the contact parameters of tobacco were calibrated, the breakage model of tobacco was constructed, and the breakage parameters were calibrated.[Methods]Adiscrete element contact model was constructed taking tobacco as the research object. PlackettBurman test design and Box-Behnken test design were combined to determine the physical parameters of tobacco. The optimal values of Poisson's ratio of tobacco, coefficient of recovery between tobacco, coefficient of static friction between tobacco, coefficient of rolling friction between tobacco, coefficient of recovery between tobacco and equipment, coefficient of static friction between tobacco and equipment, coefficient of kinetic friction between tobacco and equipment and the shear modulus of the tobacco were 0.35, 0.35, 0.49, 0.03, 0.35, 0.44, 0.12, 5.75 × 106 Pa respectively. The breakage model of tobacco was constructed, and the main parameters were calibrated using heavy ball drop experiments, including a bond radius of 0.216 mm, a unit normal stiffness of 4.62×1010 N·m-3 , a unit tangential stiffness of 1.62×1010 N·m-3 , a critical normal force of 5.10×1010 Pa and critical tangential force 1.89×1010 Pa. The validity of the breakage parameters was further verified using uniaxial compression test. [Results]In the calibration of discrete element contact parameters of tobacco, the average relative error between numerical simulation and test results was 2.9%, and the calibration results of discrete element contact parameters of tobacco were accurate; in the calibration of breakage model parameters of tobacco, the average relative error between numerical simulation and test results of heavy ball drop was 0.82%, and the average relative error between numerical simulation and test results of uniaxial compression was 4.53%, and the tobacco breakage model was reliable. [Conclusion] The research can provide an effective model reference for the exploration of tobacco breakage.
Authors and Affiliations
LI Guang, LI Zidi
Keywords
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- EP ID EP764959
- DOI DOI:10.3969/j.issn.1000-1700.2025.01.007
- Views 5
- Downloads 0
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