Analysis on sensitivity and imperfect interfaces on the propagation of inter-facial anti-plane waves on the finely coated piezomagnetic reinforced composite structure

Abstract Surface acoustic waves are pivotal in modern technology due to their exceptional sensitivity and adaptability. The motivation for this study stems from the need to enhance the efficiency of surface wave sensors by advancing mass loading techniques and addressing the imperfections that can alter the magneto-mechanical properties, velocities, and propagation behavior of anti-plane waves in layered composite structures. The present work analyses the propagation behavior of Love-type and B-G-type waves in a piezomagnetic fiber-reinforced composite (PMFRC) structure underlying an Air medium (in Model-1) and under a coated thin filmed mass loading (in Model-2) in the presence of distinct inter-facial imperfections viz. Mechanically compliant magnetically weakly permeable (MCMWP), Mechanically compliant magnetically highly permeable (MCMHP), Low magnetic permeable (LMP), Magnetically grounded (MG), and welded. These inter-facial imperfections have been considered as five different submodels under both Model-1 and 2. At first, the micromechanical model of PMFRC has been developed, and closed-form expression for the material constants has been derived by harnessing the techniques of strength of materials and the rule of mixtures. Employing the suitable boundary conditions associated with distinct five inter-facial imperfections, velocity equations have been derived, validated, and graphically demonstrated for both magnetic cases (open (MO) and short (MS)) under various submodels of both models. Magneto-mechanical coupling, mass loading sensitivity, volume fraction, and imperfect interfaces affecting the phase velocity of Love-type and B-G type waves have been analyzed with a comparative approach under various models and submodels. The outcomes of the study can enhance detection capabilities in SAW devices, broadening their use in telecommunications, aerospace, and other industries.