摘要
选取南粳5055品种稻谷为试验样品，使其在6个LHT-1型回弹模量仪中储藏2个月，顶部分别加载50、100、150、200、250和300kPa。利用Brookfield质构仪对回弹模量仪装样筒内的顶部与底部样品进行压缩实验。结果表明：储藏2个月，储藏压力为0～300kPa，稻谷籽粒的最大破坏力、最大破坏能、最大破坏应变、表观接触弹性模量和最大接触应力的变化范围分别为81．58～3．78N，8．10～6．27MJ，0．1392—0．1168，71．32～57．68MPa，40．84～19．11MPa。随着稻谷储藏压力的增加，最大破坏力、最大破坏能、最大破坏应变、表观接触弹性模量和最大接触应变皆减小。
In the paper, the paddy grains Nanjing 5055 had been stored in six LHT - 1 rebound modulus testers for 2 months under top pressures of 50, 100, 150, 200, 250 and 300 kPa respectively. An experimental study was established to determine the compressional properties of paddy grains by Brookfield Texture Analyzer. The paddy grains for test were chosen from the top and bottom of the silo. The results showed that along with the storage pressure increasing from 0 to 300 kPa, the rupture force of paddy grains was decreased from 81.58 to 73.78 N, the rupture energy from 8.10 to 6.27 MJ, the rupture strain from 0. 139 2 to 0. 116 8, the apparent contact modulus of elasticity from 171.32 to 57.68 MPa and the maximum contact stress from 40.84 to 19.11 MPa. All of the compressional properties of the paddy grains expressed a negative linear relationship with storage pressure.
出处
《中国粮油学报》
EI
CAS
CSCD
北大核心
2015年第10期78-82,共5页
Journal of the Chinese Cereals and Oils Association
基金
国家自然科学基金(31371865)
公益性行业科研专项(201313001)
关键词
稻谷籽粒
储藏压力
压缩特性
paddy grains, storage pressure, compressional properties
