A study to investigate the probabilistic variation in material failure mechanics of a typical high hardness armor (HHA) impacted by a tungsten penetrator was conducted. The HULL package was patched for simulation studies. Results from two different sets of calculations, each with a different randomness level, showed a relationship between the final penetrator lengths (between stations) and the prescribed randomness.

Since higher percent deviation is likely associated with the higher failure rate of the target material, thus, at lower percent deviations, there is less penetration into the target and more compression of the penetrator, resulting in a smaller final length. Hence, the relationship seems to be a result of the compressive state of the penetrator rather than a result of its erosion. This relationship is likely to be present also in a more rigorous calculation with a Lagrangian-based formulation.

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