Effect of porosity on active damping of geometrically nonlinear vibrations of a functionally graded magneto-electro-elastic plate

This paper investigates the effect of porosity on active damping of geometrically nonlinear vibrations(GNLV) of the magneto-electro-elastic(MEE) functionally graded(FG) plates incorporated with active treatment constricted layer damping(ATCLD) patches. The perpendicularly/slanted reinforced 1-3 piezoelectric composite(1-3 PZC) constricting layer. The constricted viscoelastic layer of the ATCLD is modeled in the time-domain using Golla-Hughes-Mc Tavish(GHM) technique. Different types of porosity distribution in the porous magneto-electro-elastic functionally graded PMEE-FG plate graded in the thickness direction. Considering the coupling effects among elasticity, electrical, and magnetic fields, a three-dimensional finite element(FE) model for the smart PMEE-FG plate is obtained by incorporating the theory of layer-wise shear deformation. The geometric nonlinearity adopts the von K arm an principle.The study presents the effects of a variant of a power-law index, porosity index, the material gradation,three types of porosity distribution, boundary conditions, and the piezoelectric fiber’s orientation angle on the control of GNLV of the PMEE-FG plates. The results reveal that the FG substrate layers’ porosity significantly impacts the nonlinear behavior and damping performance of the PMEE-FG plates.