木节是木材的主要天然缺陷,文献记载,木材分等有70％取决于木节的存在。关于木节对木材力学性质的影响,国内外虽然采用不同方法,就某些树种的木材进行过研究,但与正常木材材性的研究比较,这方面的工作做得还不多,而且其中除一部分的研究采用大试样以外,多是采用小试样进行研究。在国内,魏亚和白同仁(1957)采用 Wood knot is the main natural defects of wood, documented, wood grading 70% depends on the presence of wood section. As to the effect of wood section on the mechanical properties of wood, although some methods have been used at home and abroad to study the wood of some tree species, compared with the study of normal wood properties, the work in this area has not been done much, and among them, Part of the study using a large sample, mostly using small samples for research. In China, Wei Ya and White Tongren (1957) adopted