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ARTICLE

A Study on the Physical Properties of Banana Straw Based on the Discrete Element Method

Sen Zhang1, Jie Jiang2,3,*, Yuedong Wang4
1 School of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming, 650500, China
2 Engineering School of Honghe University, Mengzi, 661199, China
3 Yunnan University Research Center of Mechatronics Technology and Applied Engineering of Plateau Agricultural Machinery, Mengzi, 661199, China
4 Honghe Agricultural Machinery Research Institute, Mengzi, 661199, China
* Corresponding Author: Jie Jiang. Email: jiangjie_uoh@163.com
(This article belongs to this Special Issue: Computational Mechanics and Fluid Dynamics in Intelligent Manufacturing and Material Processing)

Fluid Dynamics & Materials Processing https://doi.org/10.32604/fdmp.2022.024070

Received 23 May 2022; Accepted 20 July 2022; Published online 27 September 2022

Abstract

To improve the application of discrete element models (DEM) to the design of agricultural crushers, in this study a new highly accurate model is elaborated. The model takes into account the fiber structure, porous nature of the material and the leaf sheath coating structure. Dedicated experimental tests are conducted to determine the required “intrinsic” and basic contact parameters of the considered banana straw materials. A large number of bonding parameters are examined in relation to the particle aggregation model in order to characterize different actual banana straws. Using the particle surface energy contact model, the viscosity characteristics of the crushed material are determined together with the related stacking angle (considered as the main response factor). Through single factor experiment analysis, it is found that when the surface energy is 0.9 J·m-2, the relative error between simulations and physical experiments is 5.288%.

Keywords

Banana straw; discrete element model; contact model; surface energy; DEM
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