基于Hopkinson压杆的动态压剪复合加载实验研究

摘要

提出了一种可用于研究压剪复合加载下,材料动态力学性能的实验装置,该装置基于Hopkinson压杆,通过添加一个带倾斜端面的垫块,实现压剪复合加载.分析了该实验装置的基本数据处理方法,并利用有限元分析验证了此分析方法的可行性;然后利用该装置对常规金属材料进行了相同冲击速度,不同倾斜角度（0°,30°,45°）下的一系列实验.实验结果表明,该装置能实现压剪复合加载,并且能得到材料的动态屈服面,为研究材料在复杂应力状态下的动态力学性能提供了新的实验方法.%This paper presents a new combined compression-shear test technique based on Hopkinson pressure bar to investigate the dynamic response of materials.The desired compression-shear loading were applied by the beveled ends with different angles.The data processing methods are studied and verified by the finite element analysis.A series of experiments on common metal were performed at the same impact velocity with the loading angles ranging from 0°to 60°.It shows that this method can provide combined compression-shear loading,and achieve a new experimental method to investigate the dynamic mechanical properties of materials under impact multiaxial loadings.