4. Conclusions
The present study is focused primarily upon the mechanical properties of fiber-reinforced polymer composites containing graphene-carbon nanotube hybrid materials. The graphene-carbon nanotube fiber-reinforced polymer composites utilize nanotechnology enhancements to provide advantageous durability and structural stability improvements over conventional fiber-reinforced polymer composites not containing graphene or carbon nanotubes. The effect of the hybrid material weight fraction on the modulus of elasticity and hardness is evaluated, stress-strain responses of the composite tensile deformation are illustrated, and the effect of strain on the bond order parameters is investigated for the fiber-reinforced polymer composite. The major conclusions are summarized as follows: