爆炸与冲击2011，Vol.31Issue(1)：36-42,7.
激光光通量位移计在Hopkinson杆中的应用
Applications of a laser displacement gauge in Hopkinson bar experiments*
摘要
Abstract
A laser displacement gauge (LDG) system is proposed. Both the static and dynamic calibrations are carried out, and the results show that the system is effective for dynamic test. As an efficient measuring method, the LDG can be applied in the Hopkinson bar experiment, such as: (1) the LDG can be used to monitor the radial displacement of the specimen, with which the dynamic Poisson's Ratio can be calculated; (2) the LDG can be adopted to measure the crack surface opening displacement of the notch in a dynamic fracture test, and then the dynamic fracture energy can be obtained by associating the signals from the strain gauges mounted on the bars; (3) an innovative Hopkinson bar system for testing ultra-soft materials under intermediate strain rates is developed, where the LDG is employed to monitor the deformation of the sample directly, and two piezoelectric force transducers are sandwiched between the specimen and two bars respectively to measure the weak dynamic loads directly.关键词
固体力学/动态断裂能/激光光通量位移计/超软材料/动态泊松比/Hopkinson杆Key words
solid mechanics/ dynamic fracture energy/ laser displacement gauge/ ultra-soft material/dynamic Poisson's ratio/ Hopkinson bar分类
数理科学引用本文复制引用
陈荣,卢芳云,林玉亮,夏开文..激光光通量位移计在Hopkinson杆中的应用[J].爆炸与冲击,2011,31(1):36-42,7.基金项目
国家自然科学基金项目(10672177,10872215) （10672177,10872215）
