Fu H, Tang X R, Li J L, Tan D W
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China.
Rev Sci Instrum. 2014 Apr;85(4):045120. doi: 10.1063/1.4871955.
A novel non-contact measurement technique had been developed for the mechanical properties of materials in Split Hopkinson Pressure Bars (SHPB). Instead of the traditional strain gages mounted on the surfaces of bars, two shutters were mounted on the end of bars to directly measure interfacial velocity using Fiber Micro-Displacement Interferometer System for Any Reflector. Using the new technique, the integrated stress-strain responses could be determined. The experimental technique was validated by SHPB test simulation. The technique had been used to investigate the dynamic response of a brittle explosive material. The results showed that the new experimental technique could be applied to the dynamic behavior in SHPB test.
一种用于分离式霍普金森压杆（SHPB）中材料力学性能的新型非接触测量技术已经被开发出来。取代传统安装在杆表面的应变片，在杆的端部安装了两个快门，以使用适用于任何反射器的光纤微位移干涉仪系统直接测量界面速度。使用这种新技术，可以确定综合应力 - 应变响应。通过SHPB试验模拟验证了该实验技术。该技术已被用于研究一种脆性炸药材料的动态响应。结果表明，这种新的实验技术可应用于SHPB试验中的动态行为。
