[1]廖声熙,崔 凯,孙庆丰,等.云南松人工林正常木与应压木物理力学性质比较[J].西北林学院学报,2013,28(06):161-64.[doi:10.3969/j.issn.1001-7461.2013.06.32]
　LIAO Sheng-xi,CUI Kai,SUN Qing-feng,et al.Comparative Study on Physical and Mechanical Properties of Normal and Compressed Woods from Pinus yunnanensis Plantations[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(06):161-64.[doi:10.3969/j.issn.1001-7461.2013.06.32]
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云南松人工林正常木与应压木物理力学性质比较()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第28卷
期数:
2013年06期
页码:
161-64
栏目:
出版日期:
2013-11-30

文章信息/Info

Title:
Comparative Study on Physical and Mechanical Properties of Normal and Compressed Woods from Pinus yunnanensis Plantations
文章编号:
1001-7461(2013)06-0161-04
作者:
廖声熙1; 崔 凯1; 孙庆丰2; 刘方炎1; 刘怡君1
1.中国林业科学研究院 资源昆虫研究所,云南 昆明 650224;
2.东北林业大学 材料科学与工程学院,黑龙江 哈尔滨 150040
Author(s):
LIAO Sheng-xi1;  CUI Kai1;  SUN Qing-feng2;  LIU Fang-yan1;  LIU Yi-jun1
1. Research Institute of Resources Insect, CAF, Kunming, Yunnan 650224, China;
2. College of Materials Science and Engineering, Northeast Forestry University, Harbin, Helongjiang 150040, China
关键词:
云南松; 木材; 力学性质; 应压木; 正常木
Keywords:
Pinus yunnanensis;  wood;  mechanical properties;  compression wood;  normal wood
分类号:
S781.3
DOI:
10.3969/j.issn.1001-7461.2013.06.32
文献标志码:
A
摘要:
对云南松人工林正常木和应压木的物理力学性质及其差异进行了分析。结果表明:云南松应压木基本密度、气干密度和全干密度分别比正常木大0.060 6 g·cm-3、0.046 0 g·cm-3和0.050 4 g·cm-3,呈极显著差异; 云南松应压木全干和气干顺纹干缩值分别比正常木干缩值大5.65和3.92倍,较易发生干燥缺陷。另外,除气干径向干缩率差异显著(p<0.05)外,应压木与正常木的其他各干缩率差异均显著(p<0.05),较正常木更容易发生翘曲变形和开裂; 应压木和正常木的气干差异干缩差异显著(p<0.05),全干差异干缩差异不显著; 正常木主要力学性质与密度均呈正相关关系,应压木的抗弯强度和抗弯弹性模量与气干密度紧密正相关,顺纹抗压强度和气干密度间无显著相关关系。
Abstract:
The physical and mechanical properties and their differences of normal wood and compression wood from Pinus yunnanensis plantations were analyzed. The results showed that, the general density, air-dried density, and absolute dry density of compression wood of P. yunnanensis were 0.060 6 g·cm-3, 0.046 g·cm-3, and 0.050 4 g·cm-3 respectively,more than normal wood, and very significantly different. The dry shrinkage value along the grain of absolute dry and air-dried compression wood were 5.65 and 3.92 times more than normal wood, and it was prone to drying detects. Moreover, besides the radial dry shrinkage rate of air-dried compression wood and normal wood reached significant difference(p<0.05), other dry shrinkage rates also reached significant difference(p<0.05), and it was prone to warping and cracking compared to normal wood. There were significant difference(p<0.05)for air-dried dry shrinkage difference between compression wood and normal wood, but no difference for absolute dry wood dry shrinkage difference. There were positive correlation between normal wood main mechanical properties and density, and compression wood bending strength and elastic modulus and air-dried density were positively correlated, but compressive strength along the grain and air-dried density showed no significant correlation.

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备注/Memo

备注/Memo:
收稿日期:2013-05-20 修回日期:2013-07-22
基金项目:国家“十二五”科技支撑计划子课题(2012BAD01B0203)。
作者简介:廖声熙,男,副研究员,研究方向:森林培育、森林经营,E-mail:Cafliao@163.com
更新日期/Last Update: 2013-11-30