Numerical analysis of high density alloys and elongated projectiles’ velocity and strength effect on their penetration into a steel target

The paper considers the impact of velocity and material strength of the elongated projectiles made of high-density alloy on their penetration into a semi-infinite steel target. The numerical simulation of a two-dimensional axisymmetric problem of the continuum mechanics is provided. Projectile velocity is in the range from 1400 to 2000 mps and corresponds to the hydrodynamic mode of interaction with reduction of the projectile length during the penetration process as a result of its material spreading. The calculations are made with the help of the developed free Lagrangian points computational algorithm, which allows us to simulate material response under the conditions of explosive and shock loading. It was found out that dependence of the projectile penetration on the projectile material yield strength is nonmonotonic and has an extremum corresponding to penetration depth maximum. While projectile velocity is increasing the extremum is getting less defined and is shifting towards higher values of the yield strength.

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