零距拉伸技术评价木材管胞纵向抗拉强度  

Estimation of Longitudinal Tensile Strength of Tracheids with Zero-Span Tension Technique

作　　者：余雁[1] 费本华[2] 张波[2] 

机构地区：[1]国际竹藤网络中心,北京100102 [2]中国林业科学研究院木材工业研究所,北京100091

出　　处：《林业科学》2006年第7期83-86,共4页Scientia Silvae Sinicae

基　　金：国家自然科学基金项目"针叶材管胞的力学性质及其主要影响因子研究"(30371125);国家重大基础研究发展规划(973)子课题"木材结构及化学组成与其品质特性的分子基础"(G1999016001)。

摘　　要：把造纸领域的零距拉伸技术引入木材科学研究领域,用于快速评价人工林杉木管胞纵向抗拉强度。结果表明:零距拉伸试样的最佳厚度是80μm,最适宜的夹持力为70psi;杉木管胞的纵向抗拉强度从髓心到树皮呈增大趋势,但在树高方向(1.3～7.3m)的差异不显著。利用零距拉伸技术具有测量迅速、可操作性强等特点,可以作为快速评价木材纤维纵向力学性能的新方法。The zero-span tension technique, used widely in papermaking industry, was introduced to wood science research in China, and used to estimate rapidly the longitudinal tensile strength of tracheids of Chinese Fir plantation wood. It was found optimum thickness of samples and damping pressure for zero-span tension was 80 μm and 70 psi respectively. Statistical analyses indicated stable increase of tracheids tensile strength from bark to pith, while no significant variation was observed along tree height from 1.3 m to 7.3 m. Therefore, it was inferred that zero-span tension could be used as a novel and reliable method for assessing the axial tensile strength of softwood tracbeids.

关 键 词：零距拉伸 木材管胞 抗拉强度 

分 类 号：S781[农业科学—木材科学与技术]