• OpenAccess
  • Influence of Boundary Conditions on Ceramic/Metal Plates under Ballistic Loads  [CST 2015]
  • DOI: 10.4236/msce.2015.37012   PP.97 - 101
  • Author(s)
  • Nadda Jongpairojcosit
  • Ceramic/metal plate is one of the most widely used light weight armors, especially to protect armor piercing (AP) bullet. Experimental investigation of projectile penetration mechanism into the ceramic/metal plate requires costly sensitive equipment to capture impact phenomenon that completes within microseconds. Alternatively, the impact mechanism can be efficiently investigated using numerical simulations. Among recent investigations on the protective capability of this ceramic/metal plates, few only discussed the influence of the boundary effects on the ballistic protection. This study thus aims to examine the effect of boundary conditions by changing shapes of the plate, border constraints and bounded materials in numerical simulation. Material models of the ceramic and the backing metal plate made of aluminium 2017-T6 are selected. The 7.62 AP projectile’s core was modeled by a solid cylinder. The initial projectile velocity was 940 m/s. The plates are represented by either a square or a hexagonal tile. The edges of the plates were fixed or enclosed by a soft epoxy. To investigate the effect of backing plate, a small gap was introduced between some of the ceramic and aluminum interfaces. The results showed that the hexagonal tiles reduce the deformation of the backing plate. The plates bounded by the epoxy exhibit inferior performances compared to the fixed plates. Finally, the small gap between the ceramic and the aluminum interfaces significantly increases the time to stop the projectile.

  • Ceramic Armor, Boundary Condition, Impact Behavior
  • References
  • [1]
    Hazell, P.J., Appleby-Thomas, G.J. and Toone, S. (2014) Ballistic Compaction of a Confined Ceramic Powder by a Non-Deforming Projectile: Experiments and Simulations. Materials and Design, 56, 943-952.
    Zeara, R., Sanchez-Saez, S., Perez-Castellanos, J.L. and Navarro, C. (2000) Modeling of the Adhesive Layer in Mixed Ceramic/Metal Armours Subjected to Impact. Composites: Part A, 31, 823-833.
    Lopez-Puente, J., Arias, A., Zaera, R. and Navarro, C. (2005) The Effect of the Thickness of the Adhesive Layer on the Ballistic Limit of Ceramic/Metal Armours. An Experimental and Numerical Study. International Journal of Impact Engineering, 32, 321-336.
    Hazell, P.J., Roberson, C.J. and Moutinho, M. (2008) The Design of Mosaic Armour: The Influence of Tile Size on Ballistic Performance. Materials and Design, 29, 1497-1503.
    Carlucci, D.E. and Jacobson, S.S. (2007) Ballistics Theory and Design of Guns and Ammunition. CRC Press.
    (2003) Ballistic Impact on Ceramic/Aramid Armour System. AUTODYN.

Engineering Information Institute is the member of/source content provider to