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The mechanical properties of carbon fiber-reinforced epoxy composites were identified by adding carbon-based nano-reinforcements, such as multi-wall carbon nanotubes (CNTs) and graphene platelets (GP), into the epoxy matrix by conducting suitable experiments. The main focus of this study is to compare the tensile modulus, tensile strength, flexural modulus, flexural strength, and thermal conductivity of carbon fiber-reinforced epoxy composites with nanoparticle reinforcement. The results revealed that adding CNTs and GP nanoparticles improved the mechanical properties compared to a pure carbon fiber-reinforced plastic composite. However, compared to CNTs, the GP's addition has increased the mechanical properties of the CFRP composite. In addition, scanning electron microscopy (SEM) images were presented to explore the microstructural characterization of carbon fiber-reinforced nanoparticle-reinforced composites. Further, using numerical studies, the transverse modulus, major and minor Poisson’s ratio of the carbon fibre reinforced with CNT and GP particle reinforcement were estimated. The current study is applied to the efficient design of nanoparticle reinforced carbon fibre reinforced composites.

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Hybrid polymer composites are more attractive because of their light in weight, more robust and rigid (in the direction of fiber) than traditional or unreinforced polymers with the added advantage of having their design and form adapted to suit the specifications of a particular application by the combination of the right choice of the materials. Reinforcement in a polymer hybrid composite can be fiber, filler, or fiber& filler together. Integrating reinforcement into polymers can lead to significant growth in the wear characteristics and mechanical properties of the polymer. Nevertheless, in applications wherever interaction by the liquid medium is inevitable, the mechanical properties and wear characteristics of hybrid polymer composites undergo degradation, which is a generally seen phenomenon since liquid medium acts as a plasticizer. This study aims to provide detailed information on the mechanical and tribological effects of hybrid polymer composites. More emphasis is given towards degradation of mechanical properties such as tensile strength, bending strength, and degradation of wear characteristics like erosion wear rate, and respective failure characteristics were analyzed under different environments such as water, kerosene, saline, sub-zero conditions.

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In this work, differently shaped carbon nano-sized allotropes reinforced composite properties are estimated and interfacial stresses are calculated and compared to get the best carbon reinforcement. Carbon nanopowder, carbon nanotubes, nanographene and Buckminster fullerenes are selected as these materials have different shapes and reinforcement of these materials in the aluminium matrix will give different properties. The comparative studies are performed by using the Micromechanics and Finite element method. The longitudinal, transverse modulus, Poisson’s ratio are estimated along with the interface stresses between the constituents of carbon power/Al matrix composite, fullerene/Al matrix composite, CNT/Al matrix composite and graphene/Al matrix composite. From this work, it is found that the longitudinal modulus of the composite will be higher by using CNT or Graphene reinforcement and carbon particle or Buckminster fullerene reinforcement will give high transverse modulus than CNT and graphene reinforcement. The interfacial stresses generated between the reinforcement and the Aluminum matrix will be less by using carbon nanopowder than the other allotropes consider for the studies. This work will give an idea of the selection of nanoreinforcement of composite material in the perspective of elastic properties and interfacial stresses.