Investigation of Explosion Simulation on Jet Forming of ZrCuNiAlAg Amorphous Alloy Liner with Eccentric Sub-hemisphere Structure

Abstract

Structure and material are the two key factors affecting the jet forming of the liner. To investigate the influence of new structure and new materials on the jet forming of the liner, a shaped charge model with eccentric sub-hemisphere structure based on ZrCuNiAlAg amorphous energetic alloy was proposed. The jet forming law of eccentric sub-hemispherical liner is studied by fixing other parameters and changing the structure parameters of liner in turn by means of AUTODYN numerical simulation software. The simulation results show that the eccentric sub-hemispherical liner of ZrCuNiAlAg amorphous alloy can form a shaped jet very well by using gathering energy effect. The speed of the shaped jet decreases gradually with time, and the shape of the jet changes from short and thick to long and thin. The curvature radius, eccentricity and wall thickness have a significant effect on the jet forming performance of ZrCuNiAlAg amorphous alloy. As the curvature radius or wall thickness increase, the tip velocity and the length diameter ratio (LDR) of the jet will decrease gradually, while with the increase of the eccentricity of the liner, the jet tip velocity and the LDR will increase gradually. The analysis of simulation data shows that the change of eccentricity has the greatest influence on the jet LDR. When the eccentricity increases from 25 mm to 39 mm, the jet LDR increases by 74% at 60μs. The wall thickness has the greatest influence on the tip velocity of the jet. When the wall thickness increases from 1.4 mm to 3.8 mm, the tip velocity of the jet at 60μs decreases by 29.77%. The results of this paper can be used for scientific reference in the structural design of this kind of liner.