【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。更多还原

【Abstract】 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 different 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 329.50 Nand 12.90 MPa of upper part,699.41 Nand 13.59 MPa of middle part,1 187.78 Nand 15.26 MPa of lower part.The average value of axial maximum compressive force and strength are 2 187.28 Nand 10.65 MPa,3 867.63 Nand 11.97 MPa,5 892.03 Nand 12.81 MPa of upper,middle and lower part respectively,as well as the average value of radial maximum compressive force and strength,which are 345.40 Nand 1.24 MPa,542.90 Nand 1.19 MPa,662.97 Nand 1.09 MPa 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 addition,moisture does great influences on maximum bending load and axial compressive strength.更多还原