基于压痕加载曲线的谷物籽粒硬度性能测定技术  

Testing of Grain Hardness Based on Indentation Loading Curve

作　　者：张锋伟[1,2] 赵春花[1] 郭维俊[3] 赵武云[1] 冯永忠[4] 韩正晟[2] 

机构地区：[1]甘肃农业大学工学院,兰州730070 [2]甘肃农业大学农学院,兰州730070 [3]兰州工业高等专科学校机械工程系,兰州730050 [4]西北农林科技大学农学院,陕西杨凌712100

出　　处：《农业机械学报》2010年第4期128-133,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金："十一五"国家科技支撑计划资助项目(2006BAD17B01-01);国家自然科学基金资助项目(50965001);甘肃省科技厅资助项目(0910XCNA090);甘肃省科技支撑计划资助项目(0804GKCA051);甘肃省科学技术攻关计划资助项目(2GS064-A52-032-03);甘肃省教育厅资助项目(0902B-05)

摘　　要：使用500 N微机控制材料试验机,利用压痕加载曲线,进行了用针尖压入法测定谷物籽粒硬度的试验研究,测得豌豆、蚕豆、大米、绿豆、小麦、扁豆以及玉米在不同组成部位、不同含水率时的硬度值在2～75 MPa范围内。研究表明,试验加载速度在0.25～2.00 mm/s范围内、针尖压入深度在0.25～1.50 mm范围内时对试验结果无明显影响,而针尖锥度与籽粒硬度存在定量关系。By using the 500 N microcomputer control material testing machine, based on the load-depth curve, the hardness of the grains was experimentally studied adopting needlepoint pressing-in method. The peas, horsebeans, rice, mung beans, wheat, lentils as well as corn at different moisture and component parts were tested and analyzed, with the measured hardness range of 2 - 75 MPa. The research showed that at the loading speed in 0.25 - 2.00 mm/s and depth of indentation in 0.25 - 1.50 mm, no obvious effect appears in the test results. The taper of needlepoint and the value of grain hardness have a quantitative relation in the measurement.

关 键 词：谷物 籽粒 硬度 压入法 试验 

分 类 号：S12[农业科学—农业基础科学] Q947.6[生物学—植物学]