ABSTRACT
In various modern military operations, technology-driven war tactics and technologically advanced ammunitions, it becomes necessary to develop and bring about an advancement in ballistic protection systems. Armour, a protective covering to prevent damage from impact, is widely used in ballistic protection. Multi-layered armours made of ceramic tiles and laminated composite are found to be a significantly efficient shield against different impact velocities since they combine high hardness, low density, high rigidity and strength in compression of ceramic with the light weight and ductility of composite laminate. In the present work, the parameters which have a significant influence on the ballistic performance of ceramic-composite armour are identified, and their sensitivity is quantified. The three-dimensional quarter-symmetric finite element (FE) model has been employed using the Lagrangian method with erosion contact algorithm in LS-DYNA code. Further, in simulation model Johnson-Holmquist, Chang-Chang theory, the Johnson-Cook model and the Mie-Gruneisen equation of state (EOS) are used for ceramic tiles, composite layers and projectiles, respectively. The simulation results are validated with available literature. Based on FE analysis, intact strength and erosion strain values of ceramic are found to be sensitive during ballistic impact.
