重组竹抗压与抗拉力学性能的分析

以慈竹制作的重组竹为研究对象,对重组竹抗压与抗拉力学性能进行了研究,并将重组竹与落叶松等6种木材的力学性能进行了比较。结果表明:重组竹顺纹抗拉强度为248.15 MPa,顺纹抗压强度129.17 MPa,稳定性能较好。通过与落叶松、云杉等木材比较发现,重组竹的抗压和抗拉强度较高,纵向与横向抗压强度差异较小,EL/ET比值小,不同方向的泊松比和强重比也有差别。重组竹的横纹抗压过程分为3个阶段(弹性阶段、塑性阶段、破坏阶段),最后发生塑性破坏。

Analysis of compressive and tensile mechanical properties of recombinant bamboo

By taking recombinant bamboo made of Neosinocalamus affinis as the research object,the tensile and compressive properties of recombinant bamboo were studied.The results were compared with six wood species including dahurian larch.The results showed that tension strength parallel to grain and compression strength parallel to gain of recombinant bamboo were 248.15 MPa and 129.17 MPa respectively,and the properties of which were stable.Compared with dahurian larch and spruce etc,the compression and tension strength of recombinant bamboo were higher,while difference between strength in transverse and longitudinal direction was much smaller,E_L/E_T were smaller,the Poisson’s ratio and strength weight ratio varied in directions.The curve of compressing perpendicular to grain was divided into three parts(elastic stage,plastic stage and failure stage),and it was plastic failure in the end.