摘要
对中山杉302和落羽杉两种木材的部分物理力学性质进行了测试比较分析。结果表明:中山杉302木材的基本密度、气干密度、抗弯强度、抗弯弹性模量和顺纹抗压强度的平均值均比落羽杉高,而弦向全干干缩率、体积全干干缩率、弦向气干干缩率、体积气干干缩率均比落羽杉低;其差异都在0.05水平显著。中山杉与落羽杉树干上段(3.3～5.3m)木材的基本密度、气干密度、抗弯强度和抗弯弹性模量均低于下段(1.3～3.3m);两种木材的气干密度与弦向气干干缩率、体积气干干缩率呈显著的正相关,与抗弯强度、顺纹抗压强度呈正相关,与抗弯弹性模量呈负相关。
The physical and mechanical properties of Taxodium‘zhongshansha 302＇ and Taxodium distichum were studied. Results show that the basic density, air-dry density, bending strength, modulus of elasticity, and compressive strength parallel to grain of T. ‘zhongshansha 302＇ are higher than those of T. distichum, and the oven-dry shrinkage and the air-dry shrinkage in tangential and volume are lower than those of Taxodium distichum, and the differences are all prominent at the 0.05 level. The basic density, air-dry density, bending strength and modulus of elasticity of the two species of wood from the lower part of trunk are lower. A significantly positive correlation was found between air-dry density and air-dry shrinkage in tangential and volume, and air-dry density is also positively correlated with bending strength and compressive strength parallel to grain, and is negatively correlated with modulus of elasticity.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2007年第2期4-6,共3页
Journal of Northeast Forestry University
基金
国家林业局中试推广项目[2002]林科中字15号资助
关键词
中山杉
落羽杉
密度
干缩
强度
Taxodium＇zhongshansha 302＇
Taxodium distichum
Density
Shrinkage
Strength
