摘要
以人工林I 214杨为材料,对不同年轮位置、不同切面的剪切强度进行了测试,并采用扫描电镜观察各种剪切断裂面。结果表明:I 214杨的剪切强度与其密度相关紧密,达到0.05 水平显著;年轮位置和受剪面是影响剪切强度的主要因素;剪切强度沿着木材径向由里向外逐渐增大;弦面剪切强度大于径面和斜面剪切强度。
The shear strength of plantation grown Poplar (Populus euramericana cv. ‘I-214’) was tested from different growth-ring and section positions. The fractured surface due to shearing was observed by SEM to investigate the influence of sampling positions on the shear strength of Poplar logs. The results found that there was a clearly linear correlation between the shear strength and the density in Poplar. Both the growth-ring position and sheared section could influence the shear strength of Poplar. The shear strength increased along the radial direction from the inside to the outside of a log, while the shear strength in the tangential section was higher than that in the radial as well as any inclined section.
出处
《木材工业》
北大核心
2005年第3期22-24,共3页
China Wood Industry
基金
国家"九五"攀登计划专项项目(95 专 07)
