Reinforcement effects of MWCNT and VGCF in bulk composites and interlayer of CFRP laminates

Effect of carbon nanotubes on strengthening of RC beams retrofitted with carbon fiber/epoxy composites

“…Most of the studies reported on the influence of using CNT modified epoxy resin on the mechanical properties of carbon fiber/epoxy nanocomposites. The results of these studies indicated that incorporation of CNTs into epoxy resin and use it along with carbon fiber reinforcements caused an enhancement in the nanocomposite flexural strength and modulus [40], fracture toughness [41][42][43], interfacial shear strength [44][45][46][47], and interfacial adhesion between epoxy matrix and carbon fiber [45,46,48].…”

Hybrid carbon nanotube–carbon fiber composites with improved in-plane mechanical properties

“…Improvements of different properties of FRPs as a result of incorporating CNTs have been reported in the literature [5][6][7][8][9]. Different methods have been used to introduce CNTs into FRPs.…”

Impact Damage and Residual Compression Strength of CNF/CFRP Hybrid Laminates

“…By the way, the influence of inserting the VGCF interlayer on the mode I and mode II interlaminar fracture toughness of VGCF/CFRP laminate was investigated in our previous study (17) (19) . It was shown clearly that the mode I and mode II interlaminar fracture toughness was greatly improved by the addition the VGCF.…”

“…However, the microstructural damage occurs inside the CFRP laminate by embedding the z-pin, so that the in-plane mechanical properties are worsening. In our previous study (17)- (19) , since the manufacturing process was comparatively easy, the method of inserting the interlayer which composed of carbon nanofiber (CNF) between unidirectional prepregs of CFRP laminate was employed, and CNF/CFRP hybrid laminates were manufactured. Mode I and II interlaminar fracture toughness of CNF/CFRP evaluated by double cantilever beam (DCB) and end notched flexure (ENF) tests, respectively.…”