同步动态测定木材弹性模量、剪切模量和泊松比系统

System for Simultaneous and Dynamic Determination of Wood Elastic Modulus,Shear Modulus and Poisson's Ratio

为了同步动态测定木材弹性模量、剪切模量和泊松比,以悬臂板一阶弯曲和扭转模态为依据,通过粘贴在悬臂板上特定位置的两个不同方向应变片,以测量悬臂板木材试件振动时的应变信号幅值和频率。研究结论表明,用0°~75°实验方案同步动态测定木材弹性模量、剪切模量和泊松比是可行的,其正确性得到简单拉伸和静态方板扭转实验的验证。

In order to simultaneously dynamically determine the elastic modulus,shear modulus and poisson's ratio of wood,based on the first-order bending and torsion modes of the cantilever plate,measuring the amplitude and frequency of the strain signal when the wood specimen vibrates through two strain gauges in different directions pasted on a specific position on the cantilever plate.The research conclusions show that it is feasible to use the 0°-75°test program to simultaneously dynamically determine the elastic modulus,shear modulus and poisson's ratio of wood.Its correctness is verified by simple tensile and static square plate torsion tests.