Vibration of FG nano-sized beams embedded in Winkler elastic foundation and with various boundary conditions


Uzun B., Civalek Ö., Yaylı M. Ö.

Mechanics Based Design of Structures and Machines, 2020 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume:
  • Publication Date: 2020
  • Doi Number: 10.1080/15397734.2020.1846560
  • Journal Name: Mechanics Based Design of Structures and Machines
  • Journal Indexes: Science Citation Index Expanded, Scopus, Academic Search Premier, Compendex, INSPEC, DIALNET
  • Keywords: Nonlocal elasticity theory, functionally graded nano-sized beam, finite element method, Euler-Bernoulli beam theory, Winkler foundation, FUNCTIONALLY GRADED BEAMS, BUCKLING ANALYSIS, NANOBEAMS, MATRIX, FORMULATION, EULER

Abstract

© 2020 Taylor & Francis Group, LLC.In the current study, vibration analysis of functionally graded (FG) nano-sized beams resting on a elastic foundation is presented via a finite element method. The elastic foundation is simulated by using one-parameter Winkler type elastic foundation model. Euler-Bernoulli beam theory and Eringen’s nonlocal elasticity theory are utilized to model the functionally graded nano-sized beams with various boundary conditions such as simply supported at both ends (S-S), clamped-clamped (C-C) and clamped-simply supported (C-S). Material properties of functionally graded nanobeam vary across the thickness direction according to the power-law distribution. The vibration behaviors of functionally graded nanobeam composed of alumina (Al2O3) and steel are shown using nonlocal finite element formulation. The importance of this paper is the utilize of shape functions and the Eringen's nonlocal elasticity theory to set up the stiffness matrices and mass matrices of the functionally graded nano-sized beam resting on Winkler elastic foundation for free vibration analysis. Bending stiffness, foundation stiffness and mass matrices are obtained to realize the solution of vibration problem of the FG nanobeam. The influences of power-law exponent (k), dimensionless nonlocal parameters (e0a/L), dimensionless Winkler foundation parameters (KW), mode numbers and boundary conditions on frequencies are investigated via several numerical examples and shown by a number of tables and figures.