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http://dx.doi.org/10.12989/sem.2020.75.6.737

Free vibration analysis of functionally graded beams with variable cross-section by the differential quadrature method based on the nonlocal theory  

Elmeiche, Noureddine (Civil Engineering and Environmental Laboratory, Sidi Bel Abbes University)
Abbad, Hichem (Civil Engineering and Environmental Laboratory, Sidi Bel Abbes University)
Mechab, Ismail (LMPM, Department of Mechanical Engineering, University of Sidi Bel Abbes)
Bernard, Fabrice (Universite de Rennes, INSA de Rennes - LGCGM)
Publication Information
Structural Engineering and Mechanics / v.75, no.6, 2020 , pp. 737-746 More about this Journal
Abstract
This paper attempts to investigate the free vibration of functionally graded material beams with nonuniform width based on the nonlocal elasticity theory. The theoretical formulations are established following the Euler-Bernoulli beam theory, and the governing equations of motion of the system are derived from the minimum total potential energy principle using the nonlocal elasticity theory. In addition, the Differential Quadrature Method (DQM) is applied, along with the Chebyshev-Gauss-Lobatto polynomials, in order to determine the weighting coefficient matrices. Furthermore, the effects of the nonlocal parameter, cross-section area of the functionally graded material (FGM) beam and various boundary conditions on the natural frequencies are examined. It is observed that the nonlocal parameter and boundary conditions significantly influence the natural frequencies of the functionally graded material beam cross-section. The results obtained, using the Differential Quadrature Method (DQM) under various boundary conditions, are found in good agreement with analytical and numerical results available in the literature.
Keywords
free vibration; nonuniform width; Euler-Bernoulli beam; Nonlocal theory; Differential Quadrature Method; Functionally Graded Material;
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Times Cited By KSCI : 9  (Citation Analysis)
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