Development of the Casing Type Impact Tension Experimental Device
套管式冲击拉伸实验装置的研制

An introduction and a brief comment on several common devices applied to impact tension test and an improved casing-type impact tension test device are presented in this paper. This device can bring directly tensile pulse and eliminate two kinds of interfering signal from reflection type Hopkinson tensile bar, and obtain transmission waveforms much better than that obtained from reflection type impact tensile experiments. Using this improved Casing-type impact tension test device, several dynamic tensile tests of plate material were carried out and stress-strain curves under three strain rates (600/s,1200/s,1800/s) were obtained. Comparing these high strain rate stress-strain curves with static stress-strain curves, the strain rate effects are obviously reflected. According to consistency of experimental results obtained from the dynamic and static stress-strain curves respectively, the advantage and validity of casing type impact tension test device were specifically analyzed. It can reflect the dynamic mechanical properties of material much better.