Numerical Analysis of Penetration of Segmented and Telescopic Projectiles of High Density Alloy into the Steel Target

In this research we analyzed how segmented and telescopic projectiles of high density alloy penetrate into a semi-infinite steel target. We carried out the analysis on the basis of numerical modeling within a two-dimensional axisymmetric problem of continuum mechanics. To describe the materials and their behaviour, we used the model value of yield strength. Interaction velocity was from 1400 to 2000 m/s that predetermined the hydrodynamic mode of penetration. Thus, we established the dependence of penetration depth increment on distance between the adjacent elements along the direction of their movement and on quantity of elements for the segmented projectiles with their fixed total length. Preservation of relative penetration depth increment for the segmented projectile with a certain quantity of elements at the same level requires increase in distance between the adjacent elements with increase in interaction velocity. Moreover, for telescopic projectiles we defined their penetrability at various order of interaction with a target of rod and tubular components of the projectile. It is shown, that at the leading arrangement of rod component the telescopic projectile penetration depth is significantly higher, than in a case when at first its tubular component penetrates. The reached increment of penetration depth into a steel target in comparison with the equivalent extended projectile of equal weight and length is recorded at the level of 20% for a case of the segmented projectiles and at the level of 50% for the telescopic.

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