Acoustic transmission loss of thermally loaded double-walled multilayer FG-GPLRC microplates integrated with magneto-electro-elastic layers

Abstract This study investigates the acoustic transmission loss properties of thermally loaded, double-walled multilayer microplates integrating functionally graded graphene platelet-reinforced composite (FGGPLRC) core layers with magneto-electro-elastic (MEE) layers. The Halpin-Tsai micromechanical model and law of mixtures predict the FG-GPLRC effective material properties for different graphene platelet distributions, including uniform symmetric and asymmetric arrangements. The first-order shear deformation theory (FSDT) and modified strain gradient theory (MSGT) account for size-dependent effects in the formulation. The governing equations are derived for the coupled electromagneto-thermoacoustic vibration response using continuity conditions and Hamilton&rsquos principle, and then solved via the Galerkin method. Parametric studies quantify the influence of length scale parameters, temperature fluctuations, temperature profiles, incident angles, cavity depth, electric and magnetic potentials, graphene distribution patterns, and graphene weight fractions on the vibroacoustic response through numerical simulations. The acoustic transmission loss is evaluated for the thermally loaded microplates. The results provide new insight into the dynamic and acoustic characteristics of double-walled FGGPLRC microplates integrated with MEE layers under thermal loading and external electromagnetic potentials.