Longitudinal wave propagation in coated sphere-filled composites based on reduced micromorphic model

This paper investigates wave propagation in coated sphere-filled composites using the reduced micromorphic model. Composite materials with coated spheres dispersed in a matrix exhibit unique mechanical properties, making them suitable for various engineering applications. The study focuses on the ability of the reduced micromorphic model to predict dispersion curves and bandgap in these composites. The main novelty of this work lies in the analytical derivation of dispersion relations and the frequency-dependent effective mass density of the composite in the framework of the reduced micromorphic model, which has not been previously explored in the context of coated sphere-filled composites. The model’s applicability is validated by comparing results for three different composites with existing literature. This investigation aims to enhance the understanding of wave propagation in complex materials and provide a robust framework for future research.