中文摘要：

钛、铝合金材料在航空航天等工程领域中得到了广泛应用,对其动态冲击力学性能的研究需借助分离式Hopkinson压杆（split Hopkinson pressure bar,SHPB）实验完成。比较并分析了SHPB实验装置及其在该两种合金材料研究上的应用,研究了影响SHPB实验结果的因素,如弥散效应、均匀性问题、惯性效应及端面摩擦效应等。通过对钛合金、铝合金材料冲击动态力学性能及其本构模型进行研究发现：钛合金和铝合金材料的流动应力和屈服强度往往会随着应变率的升高而升高,随温度的升高而降低。对钛合金和铝合金材料的冲击动态力学性能进行了比较,Johnson-Cook本构模型可以合理描述两种材料的冲击动态力学行为。

英文摘要：

Titanium alloy and aluminum alloy are widely applied in aerospace and other fields of engineering. The research of the dynamic mechanical properties of alloy materials is often accomplished by SHPB experiment. The SHPB experiment device and its application in the two kinds of alloys have been carried on comparison and analysis, and the effect factors of SHPB experimental results are studied, such as dispersion effect, uniformity problem, inertia effect and friction effect and so on. The flow stress and the yield strength of titanium alloy and aluminum alloy tends to rise with the increase of strain rate and the reduce of temperature by means of researching dynamic mechanical properties of titanium alloy, aluminum alloy and its constitutive model. Johnson-Cook constitutive model can reasonably describe the dynamic mechanical behavior of the two materials.