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林业科学 ›› 2007, Vol. 43 ›› Issue (04): 137-140.doi: 10.11707/j.1001-7488.20070425

• 研究简报 • 上一篇    下一篇

应用CT技术研究木材断口形态特征

费本华 赵勇 覃道春 杨忠 侯祝强 赵荣军   

  1. 中国林业科学研究院木材工业研究所,北京100091
  • 收稿日期:2005-08-12 修回日期:1900-01-01 出版日期:2007-04-25 发布日期:2007-04-25

Applying Computerized Tomography(CT) to Study the Feature of Wood Fracture

Fei Benhua,Zhao Yong,Qin Daochun,Yang Zhong,Hou Zhuqiang,Zhao Rongjun   

  1. Research Institute of Wood Industry,CAF Beijing 100091
  • Received:2005-08-12 Revised:1900-01-01 Online:2007-04-25 Published:2007-04-25

关键词: CT断层扫描, 木材断口, 截面变化维数

Abstract:

This paper initially applied the non-destructive evaluation-computerized tomography and the fractal theory to research the feature of wood fracture. Pinus elliottii, Populus×canadensis cv. ‘I-214’ and Larix gmelinii were choosed as samples. The author established the logarithm-logarithm relationship between the section area of wood fracture and its location, then defined the slope-DL regressed by the two factors above as the section variation fractal dimension of wood fracture. The results showed: the non-destructive evaluation-computerized tomography can effectively analysis the feature of wood fracture. All the samples exist an marked linear relationship between the section area of fracture and its location, DL is a new effective parameter to quantitatively characterize the feature of wood fracture, the delta of -2 described the complexity of fracture surface of wood. Due to the anisotropy and variation of wood properties, DL is the statistically fractal dimension. All the results are tested by the statistic software——SARS, there exists remarkable difference between the DL from different species. The average fractal dimension of fracture surface of Pinus elliottii is 2.25, Populus×canadensis cv. ‘I-214’ is 2.46, Larix gmelinii is 2.65.

Key words: CT(computerized tomography), wood fracture, fractal dimension of section area