火力楠人工林木材物理力学性质的研究  

Physical and Mechanical Properties of Michelia macclurei Plantation Wood

作　　者：韦鹏练[1] 刘晓玲 符韵林[1] WEI Peng-lian;LIU Xiao-ling;FU Yun-lin(Forestry College,Guangxi University,Nanning 530004,Guangxi,China;Guangxi Academy of Forestry,Nanning 530002,Guangxi,China)

机构地区：[1]广西大学林学院,广西南宁530004 [2]广西壮族自治区林业科学研究院,广西南宁530002

出　　处：《西北林学院学报》2020年第1期252-256,共5页Journal of Northwest Forestry University

基　　金：国家自然科学基金(31560191)

摘　　要：为掌握火力楠人工林木材的性质,为其木材利用提供科学指导,对火力楠人工林木材的主要物理力学性能指标进行了测定分析。结果表明,火力楠人工林木材的基本密度、气干密度以及全干密度平均分别为0.531、0.641 g·cm^-3和0.596 g·cm^-3,弦向、径向和体积气干干缩率平均分别为3.9%、2.7%和6.5%,对应的干缩系数平均分别为0.346%、0.239%和0.576%,差异干缩为1.444,属密度适中、干缩性小的一类木材;木材端面、弦面和径面硬度平均分别为5989、4847 N和4829 N,抗弯强度、弹性模量、顺纹抗压以及冲击韧性平均分别为117.2 MPa(3级),10.61 GPa(3级)、57.8 MPa(3级)和55 kJ·m^-2(2级),综合强度达175 MPa,综合品质系数达3295.7×10^5 Pa,属高等级材。In order to master the properties of Michelia macclurei plantation wood and to provide scientific guidance for its utilization,the main physical mechanical properties of the wood were studied.The results showed that the M.macclurei plantation wood belonged to medium density grade and the oven-dried shrinkage coefficient was in small category.The basic,air dried,and and oven dried densities were 0.531,0.641,and 0.596 g·cm^-3,respectively.Tangential,radial and volume shrinkage ratios of air dried sample were 3.9%,2.7%,and 6.5% with shrinkage coefficients of 0.346%,0.239% and 0.576%,respectively,and the difference of oven-dried shrinkage was 1.444.The values of hardness on cross,tangential and radial surfaces were 5 989,4 847,and 4 829 N respectively.The values of bending strength,modulus of elasticity,compression strength parallel to grain and impact toughness were 117.2 MPa(level 3),10.61 GPa(level 3),57.8 MPa(level 3),and 55 KJ/m^2(level 2),respectively.The comprehensive strength was 175 MPa.The comprehensive quality coefficient of the wood was 3 295.7×10^5 Pa,belonging to high-grade wood.

关 键 词：火力楠 人工林木材 物理性质 力学性质 

分 类 号：S781.29[农业科学—木材科学与技术]