Construction of an Accurate Wheat-Grain Model Based on X-ray Tomography and Bonding Parameters by Discrete Element

Author:

Zhou Ying12,Shang Wenyu1,Hui Yanbo12,Shi Chuang1,Gao Ju1,Zhang Yongzhen1,Liu Juanjuan1,Cheng Dongdong1,Zhu Kang1

Affiliation:

1. College of Mechanical and Electrical Engineering, Henan University of Technology, Zhengzhou 450001, China

2. Key Laboratory of Grain Information Processing and Control, Henan University of Technology, Ministry of Education, Zhengzhou 450001, China

Abstract

There will be great damage in the process of harvesting, transporting, and storing after grain matures. The injury rate is as high as 8% to 12%. After damage, the germination rate of the grain becomes lower, the quality decreases, and it is easily infected with pests and molds. This study of the grain-crushing characteristics is of great significance to ensure grain quality, and an accurate crushing model is a prerequisite for effectively simulating crushing characteristics. This paper studies the shattering characteristics of wheat grains. Two-dimensional slices of wheat grain were obtained using X-ray tomography technology. Then, an accurate three-dimensional outer contour model of the wheat particle was constructed using image filtering and segmentation algorithms. The particle filling process was conducted using EDEM 2018 software to establish a wheat particle simulation model based on the Hertz–Mindlin with a Bonding contact model. Using the DOE experimental design method, single-factor experiments, Plackett–Burman experiments, steepest-climb experiments, and Box–Behnken were designed to study the fragmentation characteristics of wheat particles combined with parameter calibration and physical experiments. The test results show that the normal stiffness per unit area is 7.392 × 1010 N/m3, critical normal stress is 5.293 × 106 Pa, critical tangential stress is 5.001 × 106 Pa, and the relative error about 3%, which verifies the reliability of the simulation parameters in the discrete-element crushing model of wheat grain. This study focuses on two essential aspects: 1. establishing an accurate wheat-grain contour model; and 2. calibrating the bonding parameters of the discrete-element simulation model of wheat grain. The wheat grain discrete-element crushing model and the calibration of its bonding parameters are constructed to provide a foundation for the study of wheat-grain crushing characteristics. It is of great significance to study the situation of wheat grains and where cracks are produced. In this paper, an accurate model of the wheat-grain contour is established, and the bonding parameters of the discrete-element simulation model of the wheat grain are calibrated. The calibration of the model of the discrete elements of wheat-grain fragmentation and its bonding parameters will provide a basis for studying the crushing characteristics of wheat grain. Understanding the condition of wheat grains and the causes of cracks carries significant academic significance.

Funder

Open Fund Project of Key Laboratory of Grain Information Processing & Control, Ministry of Education, Henan University of Technology

Publisher

MDPI AG

Subject

Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science

Reference28 articles.

1. Research on the construction of safety management and operation mechanism of grain storage and transportation in China;Zheng;Soc. Sci. Shandong Prov.,2014

2. Some mechanical characteristics of wheat seeds Obtained by Uniaxial Compression Tests;Voicu;UPB Sci. Bull. Ser. D Mech. Eng.,2013

3. Nano- and micromechanical properties of wheat grain by atomic force microscopy (AFM) and nano-indentation (IIT) and their relationship with the mechanical properties evaluated by uniaxial compression test;Barrer;J. Cereal Sci.,2019

4. The Calculations and Simulation Testing on the Elastic Modulus of Wheat;Jia;Interdiscip. Sci. Comput. Life Sci.,2015

5. The relationship between the crushing resistance of wheat grain and its quality traits;Cheng;Grain Oil Process.,2008

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