Studies for improved damage tolerance of ceramics against ballistic impact using layers

摘要

Ceramics are lightweight alternatives to metal armour. However, brittle behavior of monolithic ceramics impedes their application to armour. One approach for improving toughness of ceramics could be by using layered ceramics. In this study, we evaluated layered ceramics for armour applications based on numerical analysis validated with experiments. Consistent to the trends in literature, we observed that layers degrade the resistance to ballistic impact. However, improved energy absorption is demonstrated by layered ceramics. These conflicting dual trends were not presented and quantified in any earlier studies conducted elsewhere. Another new observation not documented earlier is the effect of interface strength. Using an interface material of sufficient strength, penetration resistance of layered ceramics can be improved beyond monolithic ceramics. Using these findings, new layered ceramic armour can be designed that is cost-effective and better performing than monolithic ceramics.