Numerical Simulation and Experimental Study on Jet Forming and Penetration Performance of Zr-based Amorphous Alloy Liner

It is an important trend for the development of shaped charge (SC) technology to use energetic material in liner. As a new metastable energetic material, zirconium (Zr) based amorphous alloy has incomparable advantages over other energetic materials. In order to understand the jet forming law of Zr-based amorphous alloy liner and acquire an accurate understanding of the influence of key factors such as cone angle and wall thickness on the jet parameters of this kind of liner, the conical ZrCuNiAlAg amorphous alloy liner is taken as a research object and some numerical simulation of the jet forming process are carried out including 5 cone angles under certain wall thickness conditions and 5 kinds of wall thicknesses under certain cone angle conditions based on AUTODYN software. The static explosion tests of Zr-based amorphous alloy liner against steel target plate are carried out as well. The results show that the conical ZrCuNiAlAg amorphous alloy liner can form a stable and continuous jet with a spindle shape under the action of explosive products. In a certain range, both the tip velocity and length diameter ratio (LDR) of the jet decrease with the increasing cone angle and wall thickness of the liner. The average penetration depth of a conical ZrCuNiAlAg amorphous alloy liner with 40° cone angle and 1.2mm wall thickness against 45# steel target plate is 97.5mm at the stand-off distance of 3 times of charge diameter (CD). The diameter of perforation entrance is 25mm. The deflagration reaction and the deflagration products' reverse flight and strong erosion through the orifice are the main reasons for the formation of "large diameter, small penetration depth" perforation by the jet, which shows obvious energy-releasing characteristics in the process of penetration. The above results have certain guiding significance for the structural design of Zr-based amorphous alloy liner and the SC.