Bending and eigenfrequency analysis of glass fiber reinforced honeycomb sandwich shell panels containing graphene-decorated with graphene quantum dots.

• The effects of GDGQD reinforcement on GFRP honeycomb sandwich shells are investigated. • The mechanical characteristics of the GDGQD-reinforced GFRP composites were evaluated using experimental tests. • The GDGQD-GFRP composite surfaces were observed using SEM analysis. • HSDT is employed to model the GDGQD-reinforced GFRP sandwich shells. • The influences of various parameters on the bending and dynamic behavior of the GFRP sandwich shells are studied. The present study employs a finite element (FE) formulation to examine the free vibration and bending analyses of sandwich shells made of a glass fiber reinforced polymer (GFRP) composite honeycomb core and graphene decorated with graphene quantum dots (GDGQD) reinforced by GFRP composite face layers. The mechanical characteristics of the GFRP composites with GDGQD reinforcement were evaluated using experimental tests. The FE formulation was developed to compute the vibration and bending responses of the sandwich shells via MATLAB software. The Lagrange method is used for dynamic analysis, whereas the principle of potential energy is used for static analysis. The FE model's validity is compared to numerical data reported in the literature in terms of frequencies and deflection, and the results demonstrate excellent agreement. The impacts of the end conditions, core-to-facesheet thickness ratio, curvature ratios, and weight percent of GDGQD are studied further in relation to the bending and dynamic properties of GFRP sandwich shells. [ABSTRACT FROM AUTHOR]