microtomed 木头节的机械性质是比正常尺寸的样品的那些显著地低的,这反复被观察了,但是很少调查被进行了处理这个话题,特别基于理论途径。我们在从 70 ~ 200 μ m 在厚度的 microtomed 节上测量了中国冷杉木的纵的 MOE 并且把这些与正常尺寸的样品的价值作比较。结果显示 microtomed 木头节的 MOE 从 70 ~ 200 μ m 与厚度增加,但是是显著地不到正常样品的。2.63 的一个尺寸效果系数为正常尺寸和 200 μ m 的样品基于统计数据被推断厚 microtomed 节。最后,解释基于一完全砍房间墙的抑制模型和单个纤维多重模型在 microtomed 木头节的僵硬上为尺寸效果被建议。
It has been repeatedly observed that the mechanical properties of microtomed wood sections are significantly lower than those of samples of normal size, but few investigations have been conducted to deal with this topic, especially based on theoretical approaches. We measured the longitudinal MOE of Chinese fir on microtomed sections ranging in thickness from 70 to 200 μm and compared these with the values of samples of normal size. The results indicate that the MOE of microtomed wood sections increases with thickness from 70 to 200 μm, but is significantly less than that of normal samples. A size effect coefficient of 2.63 is inferred based on statistical data for samples of normal size and 200 μm thick microtomed sections. Finally, an explanation based on a complete shear restraint model of cell walls and a single fiber multi-ply model is proposed for the size effect on stiffness of microtomed wood sections.