农业工程学报2012，Vol.28Issue(18)：255-262,8.DOI:10.3969/j.issn.1002-6819.2012.18.036
糙米机械破碎力学特性试验与分析
Experiment and analysis of mechanical properties of mechanical crushing brown rice
摘要
Abstract
In order to investigate the mechanical breaking properties of brown rices and their relationships with its kernel structure, texture analyzer tests were used to determine and analyze the stabbing forces, three-point bending, anti-shearing and compressing forces of brown rices. Breaking properties (three-point bending) of brown rices and milled rices were compared. The results showed that the occurrence of crush was due to the uneven of the endosperm and in the external force, the internal cracks were formed firstly, and stress concentration at the crack tip promoted further crack propagation, which led to grain fracture eventually. Stabbing breaking force of different samples with thickness of (1.0±0.5) mm were about 10 N, and the binding force of different samples were closed, and the crush in the grain processing was related with thickness and endosperm properties of the grain. Three point bending force better reflected the broken properties of grain in the process of milling. Under the protect of bran layer, the mechanical properties of brown rices were better than the milled rices. The results provide a base for the determination of the brown rice processing and storage technique.关键词
力学特性/质地/粮食/糙米/破碎特性Key words
mechanical properties/ texture/ grain/ brown rice/ broken property分类
轻工纺织引用本文复制引用
周显青,张玉荣,褚洪强,刘影..糙米机械破碎力学特性试验与分析[J].农业工程学报,2012,28(18):255-262,8.基金项目
"十一五"国家科技支撑计划重点专项"国际标准研制"——粮食类国际标准研制与开发(2006BAK04A20-25) （2006BAK04A20-25）
"十一五"国家科技支撑计划项目:糙米集装储运减损技术和设备研发与示范(2009BADA0B02-1) （2009BADA0B02-1）
