摘要
以苎麻茎秆木质部为试验对象,在RGT-10型微机控制电子万能试验机上进行了弯折、拉伸、压缩试验。试验结果表明:“华苎4号”木质部的抗弯弹性模量为7358.69MPa,最大抗弯强度为40.77MPa;拉伸弹性模量为177.26MPa,最大抗拉强度为32.25MPa;压缩弹性模量为7.70MPa。相同部位木质部的抗弯弹性模量明显高于拉伸弹性模量,最大抗弯强度大于最大抗拉强度,木质部横向抵抗变形能力强。拉伸弹性模量与压缩弹性模量有明显差异,木质部属各向异性材料,建立力学模型应采用各向异性的本构关系。
The bending, tensile and compressive experiments of ramie xylem of the variety ＂Huazhu - 4＂ were conducted by using an universal testing machine ＂RGT- 10＂. The results are as follows. for ramie ＂Huazhu - 4＂, the average bending modulus and strength of xylem are 7 358.69 MPa and 40. 77 MPa, respectively, and its Yong＇s modulus and tensile strength are 177. 26 MPa and 32.25 MPa, respectively. Its average compressive modulus is 7. 70 MPa and bending modulus and strength are greater than its Yong＇s modulus and tensile strength. There is a distinct difference between tensile and compressive modulus. Xylem is a kind of anisotropic material and modeling its mechanical model needs anisotropic constitutive relations.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2007年第5期62-65,共4页
Transactions of the Chinese Society for Agricultural Machinery
基金
华中农业大学科技创新基金项目(项目编号:52207-07002)
关键词
苎麻
茎秆
木质部
力学性质
试验
Ramie, Stalk, Xylem, Mechanical properties, Experiment
