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杉木积成材的剖面密度分布特征及其CT辅助分析(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2010年06期
Page:
95-99
Column:
研究论文
publishdate:
2010-11-30

Article Info:/Info

Title:
Vertical density distribution characteristics and CT aided analysis of Chinese fir oriented laminated stick lumber
Author(s):
DU Chungui1 CHEN Siguo2 LIU Zhikun1 ZHANG Qisheng1*
1.School of Engineering , Zhejiang Agriculture and Forestry University, Lin′an 311300, China; 2.Alberta Research Council, Edmedon T6N 1E4, Canada
Keywords:
Chinese fir oriented laminated stick lumber vertical density distribution pore CT aided analysis
Classification number :
TS653.5
DOI:
10.3969/j.jssn.1000-2006.2010.06.021
Document Code:
A
Abstract:
The vertical densities of Chinese fir oriented laminated stick lumber(Chinese fir OLSL)with different densities were tested using Profile Density Analyzer. The profiles of Chinese fir OLSL were scanned using Computed Tomography(CT)in the length and width directions. The results showed that vertical density distribution of Chinese fir OLSL was changed in gradient. The density of the surface layer was higher than that of the inner layer, and the crest value of density of Chinese fir OLSL was in 1.0 mm away from panel surface layer. It can also be observed from the CT images that there are some pores in Chinese fir OLSL, and there are more and smaller pores in longitudinal section than in transaction, but the pores at the terminal are more and bigger than in the middle. The porosity of Chinese fir OLSL reduced along with the density increasing in the length and the width direction, Chinese fir OLSL does not fit for manufacturing low densities panels because its porosity increases along with decreasing of density. The CT could reveal vividly and intuitively the characteristics of vertical density of Chinese fir OLSL and its internal structure appearance as aided method.

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Last Update: 2010-12-27