What is it about?
Examined the influences of the porosity, temperature, moisture, material gradation, and sandwich layers thickness on the wave propagation in the sandwich FG plates. Two sandwich configurations are considered: a: with ceramic core and b: with FG core.
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Why is it important?
This work investigates the wave propagation in infinite porous FG sandwich plates in a hygrothermal environment. The analysis is conducted using a simple integral hyperbolic HSDT with only four unknowns.
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This page is a summary of: Wave propagation analysis of a ceramic-metal functionally graded sandwich plate with different porosity distributions in a hygro-thermal environment, Composite Structures, August 2021, Elsevier, DOI: 10.1016/j.compstruct.2021.114030.
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Wave propagation analysis of a ceramic-metal functionally graded sandwich plate with different porosity distributions in a hygro-thermal environment
Wave propagation analysis of porous functionally graded (FG) sandwich plate in a hygro‐thermal environment is presented in this paper. The sandwich plates’ composing materials change through three layers that are either homogeneous ceramic, homogeneous metal, or power‐law‐based functionally graded ceramic–metal. Six different porosity models are considered in the analysis to express the porosities’ distribution factor and uniformity. The study is conducted using a simple four‐unknown integral higher‐order shear deformation theory (HSDT). The effect of moisture and temperature on wave propagation in porous FG sandwich plates is investigated by considering their role on the materials’ expansion. The governing equations are derived for the wave propagation problem based on the presented theory via Hamilton’s principle. A generalized solution for wave propagation is applied to formulate the stiffness and mass matrix that describes the dispersion relations. The numerical results are obtained by solving an eigenvalue problem. The effects of core‐to‐thickness ratio, FGM power index, porosity volume fraction, temperature, and moisture change are illustrated and discussed. The presented results can be utilized as a benchmark for further studies on wave propagation in FGM plates.
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