一种适合于Hopkinson杆的实验测试方法探索  

A New Measurement Method Applied to Hopkinson Bar Experiment

作　　者：傅华[1,2] 彭金华[2] 李俊玲[1,3] 唐孝容[1] 谭多望[1] 

机构地区：[1]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室,四川绵阳621999 [2]南京理工大学化工学院,江苏南京210094 [3]国防科学技术大学理学院工程物理研究所,湖南长沙410073

出　　处：《高压物理学报》2014年第4期423-428,共6页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(10902100);中国工程物理研究院科学技术基金重大项目(2009A0201008);冲击波物理与爆轰物理实验室基金(9140C6709021005;9140C6709020907)

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。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.

关 键 词：HOPKINSON杆 激光微位移测量技术 动态力学性能 

分 类 号：O521.3[理学—高压高温物理] O347.4[理学—物理]