顶果木人工林木材物理力学性质  

Wood Physical-mechanical Properties of Acrocarpus fraxinifolius Wight et Arn.

作　　者：许彩娟[1] 符韵林[1] 孙静[1] 

机构地区：[1]广西大学,南宁530004

出　　处：《东北林业大学学报》2014年第8期86-89,共4页Journal of Northeast Forestry University

基　　金：广西自然科学基金重点项目(2010GXNSFD013024);南宁市科学研究与技术开发项目(201102094G)

摘　　要：以36年生人工林顶果木材为试验研究材料,对其木材物理力学性质进行了测定与分析。结果表明:顶果木人工林木材基本密度、气干密度、全干密度分别为:0.463、0.553、0.513 g/cm3,属中等级别;抗弯强度90.46MPa、抗弯弹性模量7 189.06 MPa、冲击韧性55.81 kJ/m2、端面硬度5 487.80 N、顺纹抗压强度42.47 MPa、横纹径向全部抗压比例极限应力6.58 MPa、横纹弦向全部抗压比例极限应力6.02 MPa、横纹径向局部抗压比例极限应力9.68 MPa、横纹弦向局部抗压比例极限应力7.99 MPa。木材抗弯强度、冲击韧性、端面硬度、顺纹抗压强度、横纹抗压强度,均属中等级别;抗弯弹性模量属低级别;综合品质系数2871×105Pa,属高等级材。We studied the physical and mechanical properties of the wood with a 36-year-old Acrocarpus fraxinifolius Wight et Arn.The average densities of basic wood, air-dried and oven-dried were 0.463, 0.553, and 0.513 g/cm3 , respectively, belonging to the middle level .The mechanical properties of A.fraxinifolius Wight et Arn .were with the bending strength of 90.46 MPa, the bending elastic modulus of 7 189.06 MPa, the impact toughness of 55.81 kJ/m2 , the hardness of cross ra-dial direction of 5 487.80 MPa, compressive strength parallel to grain of 42.47 MPa, the horizontal all compressive propor-tional limit stress of radial direction and tangential direction of 6.58 and 6.02 MPa, and the horizontal local compressive proportional limit stress of radial direction and tangential direction of 9.68 and 7.99 MPa, respectively.Compressive strength parallel to grain , the hardness on cross surface , bending strength , impact toughness , and horizontal compressive strength were medium .Volume shrinkage coefficient and differential shrinkage were in the high level , and the bending elastic modulus was in the low level.The quality factor is 2.871＆#215;108 Pa, belonging to high-grade material.

关 键 词：顶果木 木材物理性质 木材力学性质 

分 类 号：S781.29[农业科学—木材科学与技术]