Impact response of advanced composite structures reinforced by carbon nanoparticles

In this chapter we review the impact behavior of composite structures consisting of long-fiber reinforcement and thermosetting matrices based on epoxy resins loaded with carbon nanoparticles. Different types of nanotubes (single-, multi-walled, coiled) and graphene nanoplatelets are considered as carbon reinforcement of the polymer matrix. In particular, we consider the role of the nanoparticles in the energy absorption capability of the composite structures, unveiling the toughening and dissipation mechanisms related to the key features of the carbon nanoparticles, such as aspect ratio and specific surface area. The experimental behavior of the nano-reinforced composite structures under low and high velocity impact is reviewed focusing on the residual properties after impact. In addition, new results on the impact behavior of carbon fiber/epoxy structures, with marine-grade and aerospace-grade epoxy resins reinforced by multi-walled carbon nanotubes, are also presented.