摘要
本文研究了我国东北四种常见木材在吸湿范围內含水率对渗透性影响的变化规律,得出了变化规律的数学模型,从木材与水分作用关系阐述了含水率对木材渗透性影响的机理。结果表明:①在吸湿范围内,木材渗透性与含水率成二次函数关系;②木材含水率在吸湿范围内,横向渗透性存在极值点;③木材纹孔膜上微孔的数目与半径随含水率的提高而减小。
In this paper, the relationship was studied between the permeability of Pinus koraiensis, Larix gmelinii, Betula platyphylla and Populus davidiana and moisture content of wood in the hygroscopic range. The mathematics model of variation law has been obtained and the effect mechanism of wood moisture on permeability was expounded from the relationship between wood and water. The results are as Follows: (1) The relationship between wood permeability and the moisture content is in twice curve function in the hygroscopic range. (2) There is a peak value in tangential permeability. (3) The numbcr of openings per cm^2 of cross section and pit-opening average radii reduces by the increasing of wood moisture content.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1991年第1期15-21,共7页
Journal of Northeast Forestry University
关键词
木材
含水率
渗透性
物理性质
Physical properties of wood
Permeability
Moisture content
