香合欢木材物理力学性质研究

Physical and Mechanical Properties of Albizia odoratissima Wood

为给香合欢(Albizia odoratissima)木材的综合利用提供参考,以25年生香合欢木材为研究对象,对其物理和力学性质进行测定。结果表明,香合欢木材的基本、气干和全干密度均值分别为0.635、0.761和0.727 g/cm^(3)。木材的径向、弦向和体积气干干缩率均值分别为1.53%、2.06%和3.72%,差异干缩为1.35;径向、弦向和体积全干干缩率均值分别为2.92%、5.09%和8.10%,差异干缩为1.74;径向、弦向和体积干缩系数均值分别为0.114%、0.272%和0.395%。木材的端面、径面和弦面硬度均值分别为6655、4968和5218 N。木材的抗弯强度、抗弯弹性模量、顺纹抗压强度和冲击韧性均值分别为136.7 MPa、12820 MPa、70.1 MPa和100 kJ/m^(2)。木材综合品质系数为3256.3×10^(5) Pa。香合欢木材干缩均匀性中等,尺寸稳定性较好,刚性中等,有较高的密度、硬度、韧性和品质系数及抗弯和顺纹抗压强度,为优良的高档家具用材。

In order to provide references for comprehensive utilization of Albizia odoratissima woods,main physical and mechanical properties of 25-year-old A.odoratissima wood were tested.Results showed that means of basic density,air-dry density and oven-dry density were 0.635,0.761 and 0.727 g/cm^(3) respectively.Means of tangential,radial and volume shrinkage rates of air-dry wood were 1.53%,2.06%and 3.72%respectively,with differential dry shrinkage of 1.35.Means of tangential,radial and volume shrinkage rates of oven-dry wood were 2.92%,5.09%and 8.10%respectively,with differential dry shrinkage of 1.74.Means of tangential,radial and volume shrinkage coefficients were 0.114%,0.272%and 0.395%respectively.Means of end face hardness,radial face hardness and tangential face hardness were 6655,4968 and 5218 N.Means of bending strength,bending elastic modulus,compressive strength parallel to grain and impact toughness were 136.7 MPa,12820 MPa,70.1 MPa and 100 kJ/m^(2).Comprehensive quality coefficient of wood was 3256.3×10^(5) Pa.A.odoratissima wood had moderate dry shrinkage uniformity and better dimensional stability.A.odoratissima wood had moderate rigidity,relatively high density,hardness,toughness and quality as well as bending strength and compressive strength parallel to grain.A.odoratissima wood was excellent material for high-grade furniture.