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

作　　者：L.Sh Esayas Subhaschandra Kattimani 

机构地区：[1]Department of Mechanical Engineering,National Institute of Technology Karnataka,Surathkal,575025,India

出　　处：《Defence Technology（防务技术）》2022年第6期891-906,共16页Defence Technology

摘　　要：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.

关 键 词：Nonlinear vibration Magneto-electro-elastic(MEE)plates Active treatment constricted layer damping(ATCLD) Porosity distribution Porous functionally graded 

分 类 号：TB33[一般工业技术—材料科学与工程]