木薯茎秆力学特性试验与研究  

Experimental study on the mechanical properties of cassava stalk

作　　者：王伟[1] 李成斌[1] 廖宇兰[1] 王金丽[2] 

机构地区：[1]海南大学机电工程学院,海口市570228 [2]中国热带农业科学院农业机械研究所,广东湛江524000

出　　处：《中国农机化学报》2017年第5期6-11,共6页Journal of Chinese Agricultural Mechanization

基　　金：国家自然科学基金项目(51365011)

摘　　要：为给木薯茎秆的机械化收获和处理提供理论依据和基础技术参数,对收获期内"华南205"品种木薯茎秆的上、中、下3种不同生长部位分别进行不同含水率下的弯曲、轴向压缩、径向压缩试验,得到茎秆的最大载荷和强度,并利用SAS软件分析各因素的影响显著性。结果表明:弯曲最大载荷均值、抗弯强度均值分别为:329.50N、12.90MPa(上部),699.41N、13.59MPa(中部),1 187.78N、15.26MPa(下部);木薯茎秆的轴向压缩最大载荷均值、压缩强度均值分别为:2 187.28N、10.65MPa(上部),3 867.63N、11.97MPa(中部),5 892.03N、12.81MPa(下部);径向压缩最大载荷均值、压缩强度均值分别为345.40N、1.24MPa(上部),542.90N、1.19MPa(中部),662.97N、1.09MPa(下部)。方差分析结果表明:生长部位对木薯茎秆压缩、弯曲的最大载荷以及对抗弯强度、径向压缩强度均有极显著性的影响,含水率对弯曲最大载荷有显著性影响,含水率对轴向压缩强度有显著性影响。In order to provide basic technical parameters and theoretical basis for mechanized harvesting and processing of cassava stalk, bending, axial compression and radial compression tests were conducted, with three growing zones of ＂Huanan 205＂ under dif- ferent moisture. The maximum load and strength were obtained, and effects of moisture on cassava stalks＇ properties were analyzed by using SAS. The results show that average value of maximum bending force and strength are 329.50N and 12.90MPa of upper part, 699.41N and 13.59MPa of middle part, 1 187.78N and 15.26MPa of lower part. The average value of axial maximum compressive force and strength are 2 187.28N and 10.65MPa, 3 867.63N and 11.97MPa, 5 892.03N and 12.81MPa of upper, middle and lower part respectively, as well as the average value of radial maximum compressive force and strength, which are 345.40N and 1.24MPa, 542.90N and 1.19MPa, 662.97N and 1.09MPa respectively. The variance analysis indicates that growing zone has significant effects on maximum bending load, compressive load, bending strength, axial compressive strength and radial compressive strength, in addi- tion, moisture does great influences on maximum bending load and axial compressive strength.

关 键 词：木薯茎秆 力学特性 弯曲 径向压缩 轴向压缩 

分 类 号：S225.7[农业科学—农业机械化工程]