杨木径向压缩的黏弹性行为  

Viscoelastic Behavior of Poplar under Radical Compression

作　　者：张晓敏[1,2] 孙正军[1] 王喜明[2] 尚莉莉[2] 

机构地区：[1]国际竹藤网络中心,北京100102 [2]内蒙古农业大学材料科学与艺术设计学院,呼和浩特010019

出　　处：《林业科学》2011年第9期135-139,共5页Scientia Silvae Sinicae

基　　金：国家"十一五"课题项目支撑"丛生竹高附加值建筑制品制造关键技术研究"(201004005)

摘　　要：以不同厚度杨木单板为原料,探讨不同应变水平、不同温度、不同含水率及有无胶黏剂对杨木单板应力松弛行为的影响。结果表明:室温、变形相同时,含水率越大,应力松弛量越大;绝干材随着温度升高,应力松弛量略有增加,但没有含水率的影响显著;绝干材在变形相同时,有胶比无胶的应力松弛量大。杨木单板的应力松弛行为可以用由Maxwell模型和弹簧并联组成的三元件模型来模拟。A study on the different thickness of poplar（Populus nigra） veneer.The effects of the different strain levels,temperature,moisture content（MC） and the adhesive on stress relaxation of poplar veneer were explored.The results showed that：（25±2）℃,under the same deformation,the amount of stress relaxation in proportional to moisture content,0% moisture content,as the temperature increases,the amount of stress relaxation increase slightly;0% moisture content,under the same deformation,poplar veneer with adhesive have a greater amount of stress relaxation.And the stress relaxation of poplar veneer behavior can be used by the Maxwell model and spring model composed of three-element to simulate.

关 键 词：杨木单板 应力松弛 微观结构 三元件模型 黏弹性 

分 类 号：S781.29[农业科学—木材科学与技术]