Direct measurement and master curve construction of viscoelastic Poisson's ratio with digital image correlation
Direct measurement and master curve construction of viscoelastic Poisson's ratio with digital image correlation
复制标题
利用数字图像相关技术直接测量粘弹性泊松比并构建主曲线
作者：
Y. Hoshino;Kazuki Tamai;Yuelin Zhang;S. Yoneyama
提出了一种测量粘弹性材料两个独立材料特性的简单方法。在动态粘弹性试验中，利用数字图像相关技术直接测量泊松比。因此，复泊松比以及复模量同时获得从同一个试样在相同的条件下。所提出的方法的有效性证明通过测量软环氧树脂的材料性能。测量实例表明，所提出的方法可以获得在较宽的约化时间范围内随时间变化的泊松比以及其他材料特性的主曲线。
A simple procedure for measuring two independent material properties of a viscoelastic material is proposed. Poisson's ratio is directly measured using digital image correlation during dynamic viscoelasticity test. Therefore, the complex Poisson's ratio as well as the complex modulus is simultaneously obtained from same specimen under same condition. The effectiveness of the proposed method is demonstrated by measuring the material properties of a soft epoxy resin. The measurement example shows that the master curves of the time‐dependent Poisson's ratio as well as other material properties for the wide range of the reduced time can be obtained by the proposed procedure.