文献类型：期刊文献

英文题名：Comparison of moisture-dependent orthotropic Young's moduli of Chinese fir wood determined by ultrasonic wave method and static compression or tension tests

作者：Jiang, Jiali[1,2] Bachtiar, Erik Valentine[2] Lu, Jianxiong[1] Niemz, Peter[2]

第一作者：Jiang, Jiali;蒋佳荔

通信作者：Jiang, JL[1];Jiang, JL[2]|[a0005c4a974b7fbd344a8]蒋佳荔;

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[2]Swiss Fed Inst Technol, Inst Bldg Mat, CH-8093 Zurich, Switzerland

年份：2018

卷号：76

期号：3

起止页码：953-964

外文期刊名：EUROPEAN JOURNAL OF WOOD AND WOOD PRODUCTS

收录：;EI(收录号：20175004542928);Scopus(收录号：2-s2.0-85037732302);WOS:【SCI-EXPANDED(收录号:WOS:000430292400015)】；

基金：This research was sponsored by the National Natural Science Foundation of China (no. 31570548). J. J. would like to gratefully acknowledge the financial support from the China Scholarship Council (CSC). A special thanks goes to Franco Michel and Thomas Schnider for their help during specimen preparation and their expert assistance in conducting the measurements.

语种：英文

外文关键词：Moisture - Poisson ratio - Stiffness - Tensile testing - Ultrasonic waves - Wave propagation

摘要：Wood with distinctively different properties in the longitudinal, radial and tangential directions exhibits a strong moisture-dependent material characteristic in the elastic range. The purpose of this study was to analyze the orthotropic elastic properties of Chinese fir wood [Cunninghamia lanceolata (Lamb.) Hook] determined at different moisture conditions using an ultrasonic wave propagation method. The results were compared with those obtained by the traditional static compression or tension tests. The results confirm that the stiffness coefficients obtained by the ultrasound without considering the complete stiffness matrix show significantly higher values than the compression or tension Young's moduli in all the three anatomical directions at each specific MC. The differences between stiffness coefficients and Young's moduli were significantly reduced by corrections with Poisson ratio. Only in tangential direction, the Young's moduli with Poisson ratio correction are statistically equivalent to the Young's moduli obtained by compression and tension.