Study on cutting performance of aramid fiber weaving material by linear shaped charge

Abstract

In order to realize the precise fuze-warhead matching, the parachute belt needs to be cut to realize the separation of projectile and parachute. Combining experiment and numerical simulation, study on cutting different layers of aramid fiber weaving parachute belt with linear shaped charge are carried out. The results show that the copper linear shaped charge with linear density of 15 g/m can reliably cut 6 layers of aramid fiber weaving material, and the cross section of parachute belt are neat. EXPLO5 software is used to calculate the JWL equation of state parameters of bulk RDX with different densities. And orthogonal anisotropic softening model proves to be successful in numerical model to simulate the cutting process of aramid fiber weaving materials by linear shaped charge. The number of cutting layers is in good agreement with the experimental results. On this basis, simulations of the cutting performance of the explosive standoff and linear density are carried out. The results show that with charge density of 1.4 g/cm3, the cutting performance is the best with the explosive standoff of 1 mm, which can cut 7 layers aramid fiber weaving material. The maximum cutting depth increases almost linearly with the increase of charge density.The research in this paper can provide theoretical support for cutting flexible aramid fiber weaving materials by linear shaped charge.