Functionally and Geometrically Ordered Ti Armor

 

Computational Models for Ti Composite Armors

1: One-Dimensional Models for Armor

Standard layered and graded armor configurations have continuous translational symmetry in the plane of the armor. Their response during the early stages of projectile impact can be approximated by the one-dimensional shock and stress wave propagation models. The one-dimensional model assumes planar interfaces between the layers and uses method of characteristics for solving the shock equations and wave interactions. The computer program solves one-dimensional strain rate independent shock propagation equations and accounts for material non-linearity, interaction of elastic and plastic shock fronts, spalling, interface strengths, and many other impact-related phenomena.

The 1-D program is used for quick scoping of different armor configurations and investigating the effects of layer arrangements and gradations. Typical results are illustrated below for the simulation of impact of 5mm long steel projectile at 50 m/s into 10 mm thick barrier made from alternating layers of Al2O3 and Ti-6Al-4V.