广东琼楠木材物理力学性能研究

为掌握广东琼楠木材的性质，对广东琼楠木材的物理力学性能进行测定、分析及评价。结果表明：广东琼楠木材的基本密度、气干密度以及全干密度分别为0.649、0.738 g/cm³和0.700 g/cm³；径向、弦向和体积气干干缩率分别为2.982%、4.239%和7.242%，差异干缩为1.421，属中等密度、干缩性小的木材。木材端面、弦面和径面硬度分别为7110、5010 N和4770 N，顺纹抗压强度、抗弯强度、抗弯弹性模量和冲击韧性分别为58.9、127.1 MPa、12.81 GPa和100 kJ/m²。木材综合品质系数为2520×10⁵ Pa，属于高等级材；木材综合强度为186 MPa，属高强度材。

Physical and Mechanical Properties of Beilschmiedia fordii Wood

In order to master the properties of Beilschmiedia fordii wood and to provide reference for its utilization, the physical and mechanical properties of Beilschmiedia fordii wood was determined, analyzed and evaluated in this research. The results showed that the Beilschmiedia fordii wood belonged to medium density grade and the over−dried shrinkage coefficient was in small category. The basic, air dried and over dried densities were 0.649, 0.738 g/cm3 and 0.700 g/cm3, respectively. Radial, tangential and volume shrinkage ratios of air dried samples were 2.982%, 4.239% and 7.242% and the difference of over−dried shrinkage was 1.421. The values of hardness on cross, tangential and radial surfaces were 7110, 5010 N and 4770 N respectively.The compression strength parallel to grain, values of bending strength, modulus of elasticity and impact toughness were 58.9, 127.1 MPa, 12.81 GPa and 100 KJ/m2. The comprehensive quality coefficient of Beilschmiedia fordii wood was 2520×105 Pa, belonging to high−grade wood; and the comprehensive strength of wood was 186 MPa, belonging to High−strength wood.