文献类型：期刊文献

英文题名：Effect of Moisture Sorption State on Vibrational Properties of Wood

作者：Lu, Jianxiong[1,2] Jiang, Jiali[2] Wu, Yiqiang[1] Li, Xianjun[1] Cai, Zhiyong[3]

第一作者：Lu, Jianxiong;吕建雄

通信作者：Lu, JX[1]

机构：[1]Cent S Univ Forestry & Technol China, Coll Mat Sci & Engn, Changsha, Peoples R China;[2]Chinese Acad Forestry, Key Lab Wood Sci & Technol State Forestry Admin, Res Inst Wood Ind, Beijing, Peoples R China;[3]US Forest Serv, Forest Prod Lab, USDA, Madison, WI 53705 USA

年份：2012

卷号：62

期号：3

起止页码：171-176

外文期刊名：FOREST PRODUCTS JOURNAL

收录：;EI(收录号：20124715685731);Scopus(收录号：2-s2.0-84869042855);WOS:【SCI-EXPANDED(收录号:WOS:000310930600003)】；

基金：This work was supported by the National Natural Science Foundation of China (30825034).

语种：英文

外文关键词：Adsorption - Desorption - Wood

摘要：The purpose of this study was to investigate the vibrational properties and corresponding anisotropicity in wood during different states of moisture sorption. Samples of maple (Acer spp.) and red oak (Quercus rubra Michx.f.) were moisture conditioned by the adsorption process from an ovendried state and by the desorption process from a water-saturated state. The dynamic modulus of elasticity (DMOE) and logarithmic decrement (delta) were examined as a function of grain orientation during moisture change processes and under constant moisture contents (MC). It was observed that regardless of species and grain direction, the DMOE and delta were lower and higher, respectively, during the moisture change process compared with those measured without a change in MC. The increase in delta value during adsorption was greater than that during desorption. These results suggest that wood in an unstable state shows lower elasticity and strength and higher damping properties than wood in an equilibrium state. Furthermore, results of this study demonstrate that a greater adsorption rate leads to greater destabilization during an adsorption process. The anisotropy in vibrational properties was found to vary between two species.