文献类型：期刊文献

中文题名：杉木动态黏弹行为的时温等效性

英文题名：Time-Temperature Superposition in the Chinese Fir Dynamic Viscoelastic Behavior Response

作者：蒋佳荔[1] 吕建雄[1]

第一作者：蒋佳荔

机构：[1]中国林业科学研究院木材工业研究所国家林业局木材科学与技术重点实验室

年份：2012

卷号：48

期号：2

起止页码：124-128

中文期刊名：林业科学

外文期刊名：Scientia Silvae Sinicae

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金杰出青年科学基金项目(30825034);中国林业科学研究院林业新技术所基本科研业务费专项基金(CAFINT2010C01)

语种：中文

中文关键词：杉木;动态黏弹性;时温等效原理;Arrhenius方程

外文关键词：Chinese Fir; dynamic viscoelastic properties; time-temperature superposition principle; Arrhenius model

分类号：S781.2

摘要：运用时温等效原理研究含水率为0.6%的木材试样的动态黏弹性质。在25～150℃温度范围内,通过频率扫描(0.1～20Hz)试验获得不同恒定温度水平下木材的贮存模量和损耗因子值。将其他温度下的黏弹性曲线通过水平移动因子平移并叠合连接至参考温度(本研究中为135℃)曲线,分别生成一定频率范围内的贮存模量和损耗因子主曲线。通过最小二乘拟合法,采用Arrhenius方程对水平移动因子与温度的关系曲线进行拟合分析。结果表明:贮存模量主曲线的水平移动因子与温度的关系曲线在25～150℃内满足Arrhenius方程,因此利用时温等效原理描述木材的动态刚度性质是适用的;但时温等效原理无法预测木材的松弛转变行为。
Time-temperature superposition principle（TTSP） was used to examine dynamic viscoelastic properties of Chinese Fir（Cunninghamia lanceolata） wood at an extremely low moisture content（0.6%）.Storage modulus and loss factor data were obtained at different constant temperatures ranging from 25 ℃ to 150 ℃ in frequency multiplexing experiments（0.1-20 Hz）.All viscoelastic curves at other temperatures were shifted along the log-frequency axis to superimpose them on a reference temperature（i.e.135 ℃ in this study） curve.The extended storage modulus and loss factor isothermal master curves were over a wide range of frequency.The shift factors were determined to be a function of temperature and fitted into the Arrhenius equation with the least squares method.The results showed that the storage modulus data were excellently fitted into the Arrhenius model,indicating the validity of the model to characterize the dynamic stiffness behavior of dry wood in the range of 25-150 ℃ using the TTSP.However,the time-temperature equivalence was not able to predict the damping properties.