Numerical Simulation of Penetration Process of Tungsten Wire Reinforced Copper-Zinc Composites

Based on the Johnson-Cook model and Gruneisen equation of state, a finite element analysis model was established, and the LS-DYNA software was used to carry out numerical simulation research on the penetration process of tungsten wire reinforced copper-zinc composite materials and tungsten-nickel-iron alloys into steel targets. The deformation of each stage in the tungsten wire was discussed, and the influence of the anisotropy of the tungsten wire on the penetration performance was discussed. The results show that the tungsten wire reinforced copper-zinc composite exhibits obvious self-sharpening phenomenon, which is consistent with the experimental results. During the penetration process, the stress is mainly concentrated on the axial tungsten wire, the stress value reaches 2.5 GPa, and the stress of Cu-Zn alloy is less than 0.47 GPa. The deformation mode is as follows: tungsten wire is bent after contracting the target plate. And the forced direction of the tungsten wire has changed to a certain angle with the axial direction. The strength and plasticity of the composite are significantly reduced at this direction. With the destroy of deformation areas, a sharp head of the composite penetrator is formed under the action of shear stress, which shows the characteristics of self-sharpening.

Automated summary

Based on the Johnson-Cook model and Gruneisen equation of state, a finite element analysis model was established to simulate the penetration process of tungsten wire reinforced copper-zinc composite materials and tungsten-nickel-iron alloys into steel targets. The self-sharpening phenomenon of the composite was observed, and the influence of tungsten wire anisotropy on the penetration performance was discussed. The results showed that the stress was concentrated on the axial tungsten wire during the penetration process, resulting in reduced strength and plasticity of the composite in a certain direction.