论文部分内容阅读
运用动态法测出毛竹和孝顺竹两种不同竹种的动切变模量 ,分析了其与密度和纤丝角的关系。分别用扭摆、X射线衍射仪和电子密度仪测出竹材试样的动切变模量、纤丝角和密度。结果表明 ,两竹种的动切变弹性模量随密度和纤丝角余弦的增大而增大 ,动切变耗散模量也随密度增大而增大 ,但与纤丝角的余弦关系不大。而耗散角随密度和纤丝角余弦的增大而减小。因此密度和纤丝角是决定竹材动切变模量的两个重要的因数
The dynamic shear method was used to measure the dynamic shear modulus of bamboo and filial bamboo, and the relationship between density and fiber angle was analyzed. The dynamic shear modulus, the fibril angle and the density of the bamboo samples were measured by wiggling, X-ray diffraction and electronic densitometry respectively. The results show that the dynamic shear modulus of two bamboo species increases with the increase of density and cosine angle, and the dynamic shear strength dissipation modulus also increases with the increase of density, but the cosine Little relationship. The dissipation angle decreases with the increase of density and cosine angle. Therefore, the density and fibrillation angle determine the dynamic shear modulus of bamboo two important factors