Study on a radial-direction dynamic tensile test method for a thin-walled tube structure with special ring section

Aimed at a thin-walled tube structure with special ring section, combined with finite element analysis, a radial-directional dynamic tensile experimental method was proposed based on conventional split Hopkinson tensile bar(SHTB). A special clamp was designed, and a hollow steel transmission bar was used to magnify the transmitted signals. For the 1Cr18Ni9Ti thin-walled tube structure, some dynamic tensile tests were implemented under different strain rates. The results show that the experimental method is applicable to the thin-walled tube structure with special ring section. In addition, the special ring has a long plastic stage and the fracture strain is reduced with strain rate increasing. Moreover, the tensile strength is obviously enhanced with strain rate increasing.