中文摘要：

低阻抗脆性材料的动力学性能日益受到人们的关注,但是由于其破坏应变小,透射信号弱,传统的Hopkinson杆测试技术往往难以获得准确的测量结果。为此,提出了一种适用于Hopkinson杆动态力学性能测试的新实验方法,即将激光微位移测量技术应用到入射杆和透射杆的端面速度测量中,实现了Hopkinson杆中试样应力-应变关系的直接测量。通过实验和数值模拟,验证了该方法的有效性。

英文摘要：

There is an increasing attention in determining the dynamic mechanical properties of low- impedance and brittle materials, but it is difficult to acquire exact experimental results by a conven- tional Hopkinson pressure bar test because of their small failure strain and weak transmission strain signal. A new method applied to Hopkinson bar dynamic mechanics test was presented in this paper. The velocities of input and output bar ends were measured by the laser micro-displacement interferom- eter technology,and the stress-strain relation of sample was achieved by this method. The proposed method is validated through numerical simulation and experiment.