Simulation of rice grain breakage process based on Tavares UFRJ model  

作　　者：Shaohang Shen Shouyu Ji Dan Zhao Yanlong Han Hao Li Ze Sun Zhuozhuang Li Anqi Li Wenyu Feng Jiaming Fei Fuguo Jia Yang Li 

机构地区：[1]College of Engineering,Northeast Agricultural University,Harbin,150030,China [2]School of Water Conservancy and Civil Engineering,Northeast Agricultural University,Harbin,150030,China [3]College of Food Science,Northeast Agricultural University,Harbin,150030,China

出　　处：《Particuology》2024年第10期65-74,共10页颗粒学报（英文版）

基　　金：The authors express their acknowledgment to the Heilongjiang Provincial Postdoctoral Science Foundation(project Nos.LBHZ22008,LBH-Z23098);National Natural Science Foundation of China(grant No.11802057)for financial support and all the persons whoassisted inthis work.

摘　　要：Understanding the breakage characteristics of rice grains is an important means to reduce rice breakage rate. However, the dynamic breakage mechanism of rice grain is unclear due to the lack of a reasonable breakage model. In this study, the uniaxial compression test and drop weight test of single rice were carried out, the breakage model of rice grain was constructed, the reliability of rice model was verified by the experiment and simulation results. The results showed that the fracture energy distribution of rice can be obtained by uniaxial compression test, the specific fracture energy of rice accords with a lognormal distribution, and the median specific fracture energy of rice is 479.75 J/kg. The damage accumulation coefficient and fragment size distribution of rice can be acquired by drop test, the result of damage accumulation coefficient of rice was 4.3. Rice grain breakage mainly occurs in the milling section of the vertical circulation rice mill.

关 键 词：Rice breakage mechanism Discrete element method Parameter calibration 

分 类 号：S511[农业科学—作物学]