Abstract: Based on the problems of tantalum materials in the application of multi-mode warhead, the feasibility study on the formation of dual-mode damage element by detonation-driven tantalum liner is conducted. The dynamic properties of tantalum materials were tested by Hopkinson bar test. The effects of tantalum liner structure parameters (cone angle, radius of curvature and wall thickness) on the formation of EFP and JPC are studied by LS-DYNA finite element software. It is found out that the range of each parameters of optimum dual mode damage element for the formation of the cone angle is 140°-150°, the radius of the arc is 0.45-0.55 times of charge diameter, and the wall thickness is 0.02-0.024 times of charge diameter. The optimum structure parameters of the tantalum liner warhead are determined by the orthogonal design, and X-ray imaging test is carried out. The experimental results are in good agreement with the simulation results, the error are controlled in 15%, and the actual penetration depth is raised to 55.4% compared to Cu. It is proved that Ta is suitable for the liner of multi-mode warhead. Key

Key words: ordnancescienceandtechnology, dualmodewarhead, liner, tantalum, explosivelyformedprojectile, jettingprojectilecharge, numericalsimulation