摘要
分别以糙米的腹部、背部作为承压面,对糙米的三点弯曲破碎力学性能进行了测试。测试结果表明,籽粒腹部、背部的三点弯曲破碎力和破碎力的分布特性存在一定的差异性,即腹部作为承压面的破碎力分布区域较分散,呈现多峰分布,而背部作为承压面的破碎力呈现集中分布的特性;腹部作为承压面的抗弯强度和弹性模量均大于背部,而其断裂能却小于背部。糙米的加工品质与其三点弯曲破碎力学性能之间亦存在一定的相关关系。
Three-point bending breaking force for ventral and dorsal side of brown rice was measured individually. Average kernel breaking force （the force required to break a brown rice kernel in three-point bending） between ventral side and dorsal side were different,and kernel-to-kernel breaking force distributions were also quite different. The breaking force distribution for ventral side tended to be multi-peak,but that for dorsal side tended to be single-peak. The bending breaking strength and elastics modulus for ventral side were more than those for dorsal side,but the fracture energy for ventral side was less than that for dorsal side. On the other hand,the rice processing quality indexes were correlated to the mechanical properties of rice.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2010年第8期121-124,130,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
南京农业大学青年科技创新基金资助项目(KJ08029)
南京农业大学SRT计划资助项目(0915A24)
南京农业大学工学院科研启动基金
江苏省农机局基金资助项目(gxz09012)
关键词
糙米
腹部
背部
力学性能
加工品质
Brown rice
Ventral side
Dorsal side
Mechanical properties
Processing quality
