<正>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

This paper described relationships of the dynamic sheer modulus and density,microfibre angle of bamboo.The dynamic sheer modulus,density and microfibre angle of two kinds of bamboo in radial and axial direction were measured by means of torsion pendulum,electronic densimentry and X ray diffraction respective.The result showed that the dynamic elastic modulus and dynamic loss modulus increased with increase in density and microfibre angle,whereas the loss tangent decreased.It is concluded that dynamic sheer modulus of bamboo were much dependent on density and microfibre.