套管式Hopkinson冲击拉伸实验相关问题的探讨

基于套管式Hopkinson冲击拉伸实验装置,对板状、棒状材料的冲击拉伸试验进行了简要介绍,重点讨论和解决材料冲击拉伸试验过程中出现的一些问题。通过提出的一种辅助式螺母连接方法,改进了棒状材料试件连接装置,解决了棒状试件试验过程中因连接拧紧度对实验结果的影响;通过建立其有限元模型,运用ABAQUS软件数值模拟分析入射杆端部拉伸螺母厚度对入射波形的影响,给出合理选择拉伸螺母的依据。

Exploration of Related Problems Emerged in Impact Tension Experiment by Using Casing Hopkinson Bar

Impact tension experiment for materials such as plate or bar is briefly introduced, and some related problems emerged in the tests are explored and answered in this paper, based on casing Hopkinson bar. Through using a kind of auxiliary nut connection, the connection devices for bar material specimen was improved, the influence of connection tightness on bar specimens experiment was eliminated. Finite element model of Hopkinson bar system was established, and ABAQUS software was employed to simulate the operation process of Hopkinson bar in order to analyse the effect of tensile nut thickness at the incident bar end on the incident wave. Finally, the basis for selecting reasonable tensile nut for experiment is obtained.