将数字散斑相关方法（DSCM） 用于研究竹材顺纹抗拉弹性模量，并将结果与常规引伸计法结果进行了比较。结果表明两种测定方法误差不超过5%，说明DSCM方法能成功运用于竹材的顺纹抗拉弹性模量的测定。利用该方法测定了5个不同竹龄靠近竹青处、竹肉及靠近竹黄处竹材的顺纹抗拉弹性模量。结果表明：从竹青至竹黄竹材顺纹抗拉弹性模量大致呈依次减小的趋势；随着竹龄的增大，竹材顺纹抗拉弹性模量也呈逐渐增加的趋势。
Abstract
Digital speckle correlation method (DSCM) was used in studying modulus of elasticity in tension parallel to grain of bamboo. Results obtained from DSCM were compared with those of conventional extensometer method. The results showed that the errors of the two results were within 5 %, this indicated that DSCM could be used to study modulus of elasticity in tension parallel to grain successfully. Then, the modulus of elasticity in tension parallel to grain of outer, middle and inner layers of five different bamboo were determined by DSCM. The results showed that the change trends of the modulus of elasticity in tension parallel to grain were related with ages and sites，it kept a decreasing trend from the outer to inner layer of stalks, and it increased with age increasing
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1]史伯章，阮锡根，吴达期.几种测量木材弹性模量及内耗的方法比较[J].南京林业大学学报,1989,13(4):21-28.
[2]Dunlop J I. Damping loss in wood at mit kilohertz frequencies[J]. Wood Science and Technology, 1978, 12：49-62.
[3]冼杏娟，冼定国.竹材的微观结构及其力学性质的关系[J].竹子研究汇刊,1990,9(3):10-23.
[4]叶民权.竹维管束抗张强度之评估[J].中华林业季刊，1995,9(1):29-37.
[5]虞华强，费本华，任海青，等.毛竹顺纹抗拉性质的变异及与气干密度的关系[J].林业科学,2006,42(3):72-76.
[6]杨云芳，刘志坤.毛竹材顺纹抗拉弹性模量及顺纹抗拉强度[J].浙江林学院学报，1996，13（1）：21-27.
[7]金观昌.计算机辅助光学测量[M].北京:清华大学出版社,1997.
[8]Sutton M A, McNeill S R, Helm J D, et al. Advances in twodimensional and threedimensional computer vision[J]．Topics in Applied Physies, 2000, 77:323-372.
[9]马少鹏.数字散斑相关方法在岩石破坏测量中的发展与应用[D].北京:清华大学,2003.
[10]邓丛静，张东升，江泽慧,等.基于DSCM的竹炭力学参数测量及破坏分析[J].辽宁工程技术大学学报:自然科学版，2010,29(2):256-259.
[11]徐曼琼,金观昌,鹿振友.数字散斑面内相关法测量木材抗压弹性模量[J].林业科学,2003,39(2):174-176.
[12]李霞镇.毛竹材力学及破坏特性研究[D].北京:中国林业科学研究院,2009.
[13]张寿槐,张文庆，骆秀琴.GB/T 15780—1995.竹材物理力学性质试验方法[S].北京:国家技术监督局,1995.
[14]夏良正，李久贤.数字图像处理[M].南京：东南大学出版社，2005.
[15]Ren H, Li X, Wang X, et al. Research on the physicalmechanical properties of moso bamboo[J]. Chinese Forestry Science and Technology, 2008, 7(3):50-55.
[16]林金国,黄宗安,邱晓东,等.石竹材材质变异规律的研究[J].竹子研究汇刊,2002,21(1):65-68.
[17]俞友明,金永明,於琼花,等.雷竹竹材物理力学性质变异规律的研究[J].竹子研究汇刊,2004,23(2):50-54.
[18]徐光余,杨爱农,李多祥,等.毛竹林大小年差异与合理砍伐之间的关系[J].农技服务,2008(7):140-141.
[19]陈新安.毛竹林大小年生长规律探讨[J].中南林业调查规划,2010(1):21-23.
基金
收稿日期：2011-03-10修回日期：2011-06-30基金项目：国家林业局林业公益性行业科研专项项目(200904034)作者简介：李霞镇(1985—),博士生。*任海青(通信作者),研究员。Email:renhq@caf.ac.cn。
PDF(1610399 KB)
