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.
The toughness mechanisms of epoxy-based nanocomposites reinforced by double-walled carbon nanotubes (DWCNT) are investigated using Raman microscopy mapping. Maps of the residual strain of the carbon nanotubes were generated for the fracture surfaces obtained after tensile loading. By imaging through different microscope objectives, Raman mapping allowed to determine the distribution of the nanotube residual strain, indicating tension or compression, in different sampling volumes near the fracture surface.
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