Impact Behavior of Aluminum Composite Laminates: Architectural Lamination and Interfacial Bonding

In the recent research, impact energy absorption and fracture behavior of aluminum composite laminates having different interfacial bonding in addition of discrepancy in architectural layer arrangement have been studied under dynamic loading. Doing this, two similar laminates, i.e.: Al6061-5vol.% SiC/Al1050/Al6061-5vol.% SiC (L(C5)) and Al6061-10vol.%SiC/Al1050/Al6061-10vol.% SiC (L(C10)), as well as one dissimilar layered structures, Al6061-5vol.%SiC/Al1050/Al6061-10vol.%SiC (L(C5/C10)), were fabricated by means of hot roll-bonding with applying different strains of 39%, 51%, and 63%. The results of energy absorption indicate that, not only the impact energy of laminates depends on the volume fraction of composite lamellas, and the interfacial bonding of metal/composite layers but also the arrangement of layers governs energy absorption. It was found that the impact behavior of similar composite laminates were decreased by increasing interfacial adhesion. In these cases the length of delamination, as well as, superior deformability of Al1050 inter-layer were introduced as two micromechanism of the fracture under dynamic loading. On the contrary, in dissimilar laminates the trend of energy absorption was ascending with rolling strain, and did not adhere rule of mixture. It was found that in the later laminates, the impact results at lowest rolling reduction was close to LC(10) laminate rolled via minimum strain, while in the most adhesive laminate, the value of energy absorption was inclined to L(C5) sample with 63% strain. It is notable that, in the dissimilar laminates, besides two previous fracture micro-mechanism, the arrangement of composites layers control the fracture behavior.