擎天树木材物理力学性质研究  

Physical and Mechanical Properties of Shorea chinensis Wood

作　　者：黄腾华[1] 符韵林[1] 李宁[1] 

机构地区：[1]广西大学林学院,广西南宁530004

出　　处：《西北林学院学报》2013年第5期160-163,共4页Journal of Northwest Forestry University

基　　金："十一五"广西林业科技项目(桂林科字[2009]第22号)

摘　　要：研究擎天树木材的密度、干缩性、弯曲强度、冲击韧性、硬度等主要物理力学性质。结果表明:基本密度、气干密度(含水率为12%)和全干密度分别为0.58°、0.658g/cm3和0.627g/cm3,气干密度属于国产木材的中等级水平。全干差异干缩和气干差异干缩分别为2.25和2.39,弦向和径向干缩湿胀差异较大。抗弯强度99.6MPa,顺纹抗压强度52.1MPa,冲击韧性53.3kJ/m2,端面、弦面和径面硬度分别为5 864.8、5 097.3N和5 265.9N。擎天树木材的综合强度为151.69MPa,属中等材。The main physical properties of Shorea chinensis woods were studied, including density, dry- shrinkage, bending strength, impact toughness, and hardness. As indicated by the results, the basic density, air-dry density （ with the moisture content of 12% ） and oven-dry density were 0.58°,0. 658 g/cm3 and 0. 627 g/cm3 , respectively, the air-dry density belonged to the medium grade level. The values of differenti al shrinkage of oven-dried and air-dried wood were 2.25 and 2.39, respectively,indicating that the differ ence of drying shrinkage and the wetting swelling in radial and tangential directions were significant. The values of bending strength and compressive strength parallel to grain of Manglietia glauca were 99.6 MPa and 52.1MPa. The toughness was 53.3 kJ/m2 ,the values of hardness on cross,tangential and radial sur faces were 5 864.8 N,5 097.3 N and 5 265.9 N, respectively. The general strength of Shorea chinensis was 151.69 MPa,indicating that the wood was of medium quality.

关 键 词：擎天树 物理性质 力学性质 

分 类 号：S781.25[农业科学—木材科学与技术]