In the field of aerospace engineering, there is a gradual increase in the utilization of FMLs. This study experimentally assessed the influence of varying graphene nanoparticle (GNP) contents (0 wt.% to 1.5 wt.%) on the impact response of carbon fiber reinforced PEEK-Ti fiber metal laminates (CF/PEEK-Ti FMLs). The damage modes and structural integrity of CF/PEEK-Ti under impact response were also investigated by finite element simulation. The findings revealed that FMLs incorporating 0.5 wt.% GNPs exhibited superior impact resistance, with an increase in absorbed energy and impact strength by 23.8% and 25%, respectively, in comparison to FMLs without the addition of GNPs. Furthermore, finite element simulations demonstrate over 98% agreement with experimental data, confirming high model accuracy. Post-impact damage mechanisms in FMLs were simulated via FEM, demonstrating that strategic GNP integration significantly mitigates delamination and matrix crack propagation under impact loading.
Wang et al. (Sat,) studied this question.