苎麻茎秆轴向压缩力学试验与分析

摘要

In this paper, elastic parameter test method of composite material mechanics was applied and WDW-10 microcomputer control universal testing machines was used to study the characteristics of axial compressive mechanics on the xylem of ramie and the whole stalk. It was shown that the average axial compressive elasticity modulus of the whole stalk of ramie xylem of Zhongzhu No. 1 was 241. 93 MPa, and the average maximum stiffness was 12. 61 MPa, while the average axial compressive elasticity modulus of stalk was 304. 85 MPa, and its average maximum stiffness was 12. 58 MPa. There was no significant difference in elasticity modulus and compressive strength between the elas-ticity modulus of xylem and stalk. In the stalk composition, xylem and phloem bond on the surface upon their adhe-sion strength which can not prevent the phloem slipping from the surface of xylem. In the compressive test, it mostly showed the load-bearing function of xylem.%采用复合材料力学弹性参数测试的试验方法,利用WDW-10微机控制电子万能试验机对苎麻木质部和茎秆整体的整秆进行了轴向压缩力学特性的研究。试验结果表明：中苎一号品种苎麻木质部整秆的轴向压缩弹性模量平均值为241．93 MPa,最大抗压强度平均值为12．61 MPa,茎秆整秆的轴向压缩弹性模量平均值为304．85 MPa,最大抗压强度平均值为12．58 MPa；木质部和茎秆整体的弹性模量和抗压强度没有显著差异,茎秆复合中木质部和韧皮部靠自身粘附力在表层粘结,其粘附力不能阻止韧皮部沿木质部表层滑移,在压缩试验中,表现更多为木质部的承载作用。