几种测量木材弹性模量及内耗的方法比较

用共振法、衰减法和声速法测定了五种木材试样的动态弹性模量和内耗,并分别与常规方法测得的静曲模量相比较,明确了各种方法之间是等价的。对推广这些方法于木材力学的研究有一定意义。

A COMPARISON OF SOME METHODS FOR MEASURING THE DYNAMIC MODULUS OF ELASTICITY AND THE INTERNAL FRICTION OF WOOD

Using the methods of forced vibration, free vibration and sound velocity measurement, specimens of five species of wood have been examined for their dynamic modulus of elasticity and internal friction. The results obtained from these methods have been compared with each other, and the values of dynamic modulus of elasticity determined by these methods have also been compared with the values of elastic modulus of static bending measured by conventional method. Consequently, some mechanical properties of wood have been acquired, and it has been made clear that all these different methods are equivalent. The will contribute to some extent to the introduction of these methods to the research of mechanical properties of wood.