受拉面节子对杉木幼龄材抗弯性能的影响OA北大核心CSTPCD
The effect of knots in tension face on bending properties of Cunninghamia lanceolate juvenile wood
为厘清节子特征与分布位置对木材抗弯性能的影响,并探究其在树干轴向高度的变化规律,采用三点弯曲法分别检测人工林杉木幼龄材无节、有节试件的弹性模量(MOE)和静曲强度(MOR),统计分析节径比、节面积和节距与试件抗弯性能的关系,记录试件面内应变分布,观测试件破坏区域形貌,最终解释节子对木材抗弯性能的影响.研究表明:树干轴向高度增加易使节子尺寸变大;节子对试件MOE影响规律不明显,节子显著降低试件MOR;节径比和节面积与MOR负相关,节距和MOE与MO…查看全部>>
This work was aimed at revealing the effect of knots'features and distribution locations on wood bending strength and investigating the variation of this effect on tree growth direction.In this study,the specimens made from Cunninghamia lanceolate juvenile wood were obtained from three different heights of tree stems and divided into two groups,including specimens with and without knots.The locations of knots at the bottom of the specimens were examined.The …查看全部>>
孙辉波;李万兆;张勰;何功秀;石江涛
南京林业大学材料科学与工程学院,南京 210037南京林业大学材料科学与工程学院,南京 210037湖南省林业科学研究院,长沙 410004中南林业科技大学林学院,长沙 410004南京林业大学材料科学与工程学院,南京 210037
林学
杉木幼龄材节子节径比节面积节距静曲强度弹性模量
Cunninghamia lanceolate juvenile woodknotknot to specimen thickness ratioknot areaknot to loading distancemodulus of rupturemodulus of elasticity
《林业工程学报》 2024 (4)
34-39,6
国家重点研发计划(2021YFD2201302-2)江苏高校"青蓝工程"资助(2022).
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