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

The acoustic transmission loss characteristics of thermally loaded, double-walled multilayer microplates with functionally graded graphene platelet-reinforced composite (FG-GPLRC) cores and magneto-electro-elastic (MEE) layers are examined in this work using a unique framework. The effective material characteristics of FG-GPLRC are assessed for a range of graphene platelet distributions, including uniform, symmetric, and asymmetric configurations, using the Halpin-Tsai micromechanical model and the law of mixtures. First-order shear deformation theory (FSDT) and modified strain gradient theory (MSGT) are used in the study to account for size-dependent effects. Hamilton’s principle and continuity conditions are used to generate governing equations for the coupled electromagneto-thermo-acoustic vibration response. The Galerkin technique is utilized to solve these equations analytically. The effects of length scale parameters, temperature profiles, temperature fluctuations, incident acoustic angles, cavity depth, electric and magnetic potentials, graphene distribution patterns, and graphene weight fractions on the STL performance are assessed through extensive parametric analyses. The findings demonstrate the critical influence of thermal and electromagnetic fields on the vibroacoustic behavior of advanced microstructures, offering new insights and practical design guidelines for engineering applications in harsh environments. Length scales elevate stiffness, improving low-frequency acoustic isolation via structural rigidification.FG-X graphene dispersion maximizes transmission loss; FG-O minimizes attenuation owing to dissimilar stiffness effects.Uniform thermal softening greatly degrades stiffness-dependent noise blocking in low-frequency bands.Actively tailoring electromechanical coupling through electric/magnetic fields overcomes inherent bandwidth limitations of passive materials. Length scales elevate stiffness, improving low-frequency acoustic isolation via structural rigidification. FG-X graphene dispersion maximizes transmission loss; FG-O minimizes attenuation owing to dissimilar stiffness effects. Uniform thermal softening greatly degrades stiffness-dependent noise blocking in low-frequency bands. Actively tailoring electromechanical coupling through electric/magnetic fields overcomes inherent bandwidth limitations of passive materials.