速生杨木单板横纹弹性模量预测模型.pdfVIP

第 27 卷第 2 期 南 京 林 业 大 学 学 报 ( 自 然 科 学 版) Vol . 27 ,No . 2 　 　 2003 年 3 月 　　 Journal of N anj ing Forest ry U niver sity (N at ural Sciences Edition) 　　 Mar . ,2003 　 速生杨木单板横纹弹性模量预测模型 卢晓宁 ,黄河浪 ,杜以诚 (南京林业大学木材工业学院 ,江苏 　南京 　2 10037) 摘 　要 :建立速生杨木单板横纹弹性性能的预测模型 ,利用该模型分析了速生杨木单板在受压 和不同含胶量情况下的横纹弹性模量 。考虑到木材密度 、单板裂隙度和涂胶量等的影响 ,按照 复合材料原理模型 ,分别在涂胶量体积大于单板裂隙体积 、涂胶量体积小于单板裂隙体积和涂 胶量体积为零条件下 ,探讨了单板横纹弹性模量模型 。结果表明:当涂胶量体积大于单板裂隙 体积时 ,预测值和试验值之间相对误差小于 15 % 。 关键词 :单板 ;横纹弹性模量 ;预测模型 中图分类号 : 文献标识码 : 文章编号 : ( ) S781. 23 　　　　 A 　　　　 1000 - 2006 2003 02 - 002 1 - 04 The Prediction of Elastic Modul us in Tangential Direction of Poplar Veneer L U Xiaoning ,HUAN G Helang ,DU Yicheng (College of Wood Science and Technology Nanjing Forestry University ,Nanjing 2 10037 ,China) Abstract :The models for elastic modulus of fastgrowing poplar veneer in t angential direction were built ,in which not only t he densit y of wood ,and split s of veneer back were included but also glue content s and com p ression ratio s of t he veneer were analyzed . Considering t he split s and gluing sp read ,t he p redicting models based on compo site material p rinciple were divided into t angential modulus at V g Vp , 0 Vg Vp ,and V g = 0. Vg and Vp were respectively t he volume of glue in veneer and t he volume of veneer split s. The re sult s from experiment at V g Vp showed t hat t he relative error s were less t han 15 % between p rediction and t rial values. Key words :Poplar veneer ; Tangential elastic module ;Prediction models 胶合板的性能很大程度上取决于单板的特性 ,这种特性不仅取决于材种本身 ,还取决于单板的加工 过程 。速生杨木单板的纵向弹性模量在文献[ 1] 中