Position of Wood Defects - Importance for Bending Strength and Stiffness

机译：木材缺陷的位置-弯曲强度和刚度的重要性

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The objective of the following pilot study is to quantify the influence of the position of different wood defects on bending strength and stiffness. 184 samples of Norway Spruce and Scots Pine could be included 82 of them with a documented wood defect (knot or pith). It can be shown that for the dynamic E-modulus it is not important if the wood defect is on the upper or on the lower side of the samples. The static E-modulus is nearly 10 % and the bending strength even SO % higher if the wood defect is on the upper side (zone of compression). The correlation coefficients were higher and the multiple linear regression models more precise for the samples with the wood defect on the upper side (zone of compression).

机译：以下初步研究的目的是量化不同木材缺陷的位置对弯曲强度和刚度的影响。可以包括184个挪威云杉和苏格兰松树样品，其中82个有记录的木材缺陷（结或髓）。可以证明，对于动态E模量，木材缺陷位于样品的上侧还是下侧并不重要。如果木材缺陷在上侧（压缩区域），则静态E模量接近10％，弯曲强度甚至高出SO％。对于上侧（压缩区域）有木材缺陷的样品，相关系数更高，多元线性回归模型更精确。

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来源
《International Symposium on Nondestructive Testing of Wood; 20000913-20000915; Sopron; HU》|2000年|P.147-154|共8页
会议地点 Sopron(HU)
作者
Seeling; Ute; Klaiber V.;
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作者单位

Forest Products Lab, Inst. of Forest Utilisation, Albert-Ludwigs-University Freiburg, Werderring 6, 79085 Freiburg, Germany;

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原文格式 PDF
正文语种 eng
中图分类木材产品标准与检验;
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Position of Wood Defects - Importance for Bending Strength and Stiffness

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