Vertical density distribution characteristics and CT aided analysis of Chinese fir oriented laminated stick lumber

DU Chungui, CHEN Siguo, LIU Zhikun, ZHANG Qisheng*

Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2010, Vol. 34 ›› Issue (06) : 95-99.

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南京林业大学学报（自然科学版）
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Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2010, Vol. 34 ›› Issue (06) : 95-99. DOI: 10.3969/j.jssn.1000-2006.2010.06.021

Vertical density distribution characteristics and CT aided analysis of Chinese fir oriented laminated stick lumber

  • DU Chungui1, CHEN Siguo2, LIU Zhikun1, ZHANG Qisheng1*
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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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DU Chungui, CHEN Siguo, LIU Zhikun, ZHANG Qisheng*. Vertical density distribution characteristics and CT aided analysis of Chinese fir oriented laminated stick lumber[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 2010, 34(06): 95-99 https://doi.org/10.3969/j.jssn.1000-2006.2010.06.021

References

[1]梅长彤,周定国,戴春平. 平面密度分布对刨花板内结合强度的影响[J]. 林业科学,2004,40(3):123-127. [2]吴章康,周定国,张宏健. 木质人造板剖面密度分布的意义与研究进展[J]. 木材工业,2001,15(4):3-5. [3]Wong E D. Formation of the density profile and its effects on the properties of particleboard[J]. Wood Science and Technology, 1999, 33: 327-340. [4]Xu W. Influence of vertical density distribution on bending modulus of elasticity of wood composites panels: a theoretical consideration[J]. Wood and Fiber Science, 1999, 31(3): 277-282. [5]Winistorfer P M. Fundamentals of vertical density profile formation in wood composites. PartⅠ. Insitu density measurement of the consolidation process [J]. Wood and Fiber Science, 2000, 32(2): 209-219. [6]Wang S, Winistorfer P M. Fundamentals of vertical density profile formation in wood composites. PartⅡ. Methodology of vertical density formation under dynamic conditions[J]. Wood and Fiber Science, 2000, 32(2): 220-238. [7] 王贵涛,董双文,郭东升,等. 剖面密度测定与人造板质量控制[J]. 木材工业,2005,19(1):37-39. [8]敖波,张定华,赵歆波,等. CT图像中裂纹缺陷的理论分析[J]. CT理论与应用研究,2005,14(4):10-16. [9]曹家龙. 医学影像中CT与MRI的“PK”[J]. 新西部,2007(20):291,296c. [10]桑斌,项金根,阮存军,等. CT实验仪的研制及其在物理教学中的应用[J]. 大学物理,2003,22(2):33-37. [11]周密. 工业XCT用新型X射线探测器性能的模拟研究[D]. 重庆:重庆大学,2004. [12]先武,李时光. 工业 CT 技术[J]. 无损检测,1996,18 (2):57-60. [13]刘志坤,杜春贵,李延军,等. 小径杉木梳解加工工艺研究[J]. 林产工业,2003,30(3):22-25. [14]杜春贵,刘志坤,张齐生,等. 杉木积成材浸渍纸贴面工艺的初步研究[J]. 浙江林学院学报,2004,21(2):134-137. [15]杜春贵,刘志坤,张齐生. 杉木制材板皮辊压制备梳解加工坯料的研究[J]. 浙江林学院学报,2008,25(2):267-27. [16]陆仁书. 胶合板制造学[M]. 北京:中国林业出版社,1993. [17]叶良明. 单板层积材及其物理力学性能[J]. 浙江林学院学报,1989,6(4):424 - 433. [18]陈桂华,胡积昌,程良松. 泡桐单板条层积材工艺研究[J]. 林业科技,2006,31(1):35-37. [19]陆仁书. 刨花板制造学[M]. 北京:中国林业出版社,1994. [20]华毓坤,周定国. 谈谈定向结构板的专用主机设计[J]. 木材加工机械,1996(4):8-12. [21]陆仁书. 纤维板制造学[M]. 北京:中国林业出版社,1993. [22]尹思慈. 木材学[M]. 北京:中国林业出版社,1996. [23]金维洙,马岩. 重组木制造工艺学[M]. 哈尔滨:东北林业大学出版社,1998. [24]张齐生. 中国竹材工业化利用[M]. 北京:中国林业出版社,1995. [25]杜春贵,张齐生,刘志坤. 杉木积成材的热压传热特性[J]. 东北林业大学学报,2009,37(2):25-27.
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