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Structural Engineering and Mechanics
  Volume 55, Number 3, August10 2015, pages 495-510
DOI: http://dx.doi.org/10.12989/sem.2015.55.3.495
 


Small scale effect on the vibration of non-uniform nanoplates
S. Chakraverty and Laxmi Behera

 
Abstract
    Free vibration of non-uniform embedded nanoplates based on classical (Kirchhoff\'s) plate theory in conjunction with nonlocal elasticity theory has been studied. The nanoplate is assumed to be rested on two-parameter Winkler-Pasternak elastic foundation. Non-uniform material properties of nanoplates have been considered by taking linear as well as quadratic variations of Young\'s modulus and density along the space coordinates. Detailed analysis has been reported for all possible cases of such variations. Trial functions denoting transverse deflection of the plate are expressed in simple algebraic polynomial forms. Application of the present method converts the problem into generalised eigen value problem. The study aims to investigate the effects of non-uniform parameter, elastic foundation, nonlocal parameter, boundary condition, aspect ratio and length of nanoplates on the frequency parameters. Three- dimensional mode shapes for some of the boundary conditions have also been illustrated. One may note that present method is easier to handle any sets of boundary conditions at the edges.
 
Key Words
    classical plate theory; Rayleigh-Ritz method; nonlocal elasticity theory; mode shapes
 
Address
S. Chakraverty and Laxmi Behera: Department of Mathematics, National Institute of Technology Rourkela, Odisha 769008, India
 

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