环境温湿度对竹材增强LVL力学性能的影响  

Effects of Temperature and Humidity of Environment on Mechanical Properties of Bamboo-wood Composites LVL

作　　者：朱一辛[1] 张心安[1] 关明杰[1] 

机构地区：[1]南京林业大学竹材工程研究中心,江苏南京210037

出　　处：《南京林业大学学报（自然科学版）》2006年第6期37-40,共4页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：江苏省科技攻关项目(BE2003309);江苏省高校科研成果产业推进工程项目(JHB06-09)

摘　　要：在不同温湿度条件下,对竹材增强单板层积材(LVL)进行处理,分析了经过处理后竹材增强LVL力学性能的变化。结果表明:经过高温高湿处理后,竹材增强LVL的力学性能均出现了明显的衰减。其中,弹性模量(MOE)平均衰减30.7%,静曲强度(MOR)平均衰减38.3%,冲击韧性平均衰减11.7%;经过低温处理后,竹材增强LVL的弹性模量和静曲强度都有微弱增长的趋势,弹性模量平均增长率为2.5%,静曲强度平均增长率为5.4%,冲击韧性平均衰减率为37.9%;在高低温交变处理过程中,竹材增强LVL的弹性模量和静曲强度处于上下波动的状态,弹性模量衰减率或增长率在5%以内,静曲强度衰减率或增长率在10%以内,冲击韧性呈衰减趋势,平均衰减率为18.7%。Bamboo-wood composites laminated veneer lumber （LVL） was treated under different temperature and humidity conditions. The mechanical properties of bamboo-wood composites LVL after the treatment were discussed. The results showed ： （1） After the treatment of high temperature and humidity, all the mechanical properties of the LVL decreased obviously, in which, MOE decreased 30. 7% in average, MOR decreased 38. 3% in average, toughness decreased 11.7% in average. （2）After the treatment of low temperature, the MOE and MOR of bamboo-wood composites LVL revealed the trends of slight increase, the average increase rate of MOE was 2.5 %, the average increase rate of MOR was 5.4%, the average decrease rate of toughness was 37.9%. （3）During the treatment of fluctuation from high temperature to low temperature, the MOE and MOR of bamboo-wood composites LVL were in the state of fluctuation, the increase rate or decrease rate of MOE was less than 5 %, the increase rate or decrease rate of MOR was less than 10%, toughness displayed the trend of decrease, the decrease rate was 18.7 % in average.

关 键 词：竹材 杨木 单板层积材 力学性能 温湿度 

分 类 号：S781[农业科学—木材科学与技术]