文献类型：期刊文献

英文题名：Comparative Studies on Tensile Mechanical Properties of Water-Saturated Earlywood and Latewood within the Same Growth Ring from Masson Pine

作者：Huang, He[1] Li, Zhu[1] Li, Yuan[1] Jiang, Jiali[1] Gao, Ruiqing[1]

通信作者：Gao, RQ[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China

年份：2024

卷号：15

期号：4

外文期刊名：FORESTS

收录：;EI(收录号：20241816001231);Scopus(收录号：2-s2.0-85191392244);WOS:【SCI-EXPANDED(收录号:WOS:001210879700001)】；

基金：The authors gratefully acknowledge the laboratory of the Research Institute of Wood Industry at the Chinese Academy of Forestry for providing testing materials and machines, and the technical staff for assisting in our experiment.

语种：英文

外文关键词：Masson pine; earlywood; latewood; microfibril angle; tensile mechanical properties

摘要：The tensile mechanical behavior of water-saturated earlywood (EW) and latewood (LW) within the same growth ring of Masson pine (Pinus massoniana) was investigated in the hydrothermal environment and discussed with respect to the density and microfibril angle (MFA) of the wood specimens. The tensile modulus, tensile strength, and strain at failure of EW and LW in the longitudinal (L) and tangential (T) directions were determined at different temperature levels ranging from 30 degrees C to 80 degrees C. Major differences in the tensile mechanical properties were found between EW and LW in the L and T directions. Compared to LW, EW showed a smaller density and a larger MFA, resulting in a lower tensile modulus, lower tensile strength, and higher strain at failure. Compared to the L specimens, the T specimens showed lower tensile modulus, lower tensile strength, and higher strain at failure. As the hygrothermal temperature increased, the MFAs, tensile modulus, and tensile strength of EW and LW specimens decreased, except for the MFAs of LW, while the strain at failure of the specimens showed the opposite trend. Variations in the tensile mechanical behavior between EW and LW were mainly influenced by the density and MFA of the specimens, and are closely associated with the hydrothermal softening properties of wood. These findings contribute to a further understanding of the structural-mechanical relationships of Masson pine wood at the cell wall level, and provide a scientific basis for the better utilization of plantation softwood in the hydrothermal environment.