摘要
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-D_L 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, D_L 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, D_L is the statistically fractal dimension. All the results are tested by the statistic software——SARS, there exists remarkable difference between the D_L 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.
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. ＇ 1-214＇ 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.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2007年第4期137-140,共4页
Scientia Silvae Sinicae
关键词
CT断层扫描
木材断口
截面变化维数
CT（computerized tomography）
wood fracture
fractal dimension of section area
