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http://dx.doi.org/10.12989/sss.2021.27.1.115

Dynamic responses of functionally graded and layered composite beams  

Kirlangic, O. (The General Directorate of Highways)
Akbas, S.D. (Department of Civil Engineering, Bursa Technical University)
Publication Information
Smart Structures and Systems / v.27, no.1, 2021 , pp. 115-122 More about this Journal
Abstract
This paper presents and compares the free and damped forced vibrations of layered and functionally graded composite beams. In the considered study, a cantilever beam subjected to a harmonic point load at the free end is investigated with layered and functionally graded materials. In the kinematics of the beam, the Timoshenko beam theory is used. The governing equations of problem are derived by using the Lagrange procedure. In the solution of the problem, the Ritz method is used. Algebraic polynomials are used with the trial functions for the Ritz method. In the obtaining of free vibration results, the eigenvalue procedure is implemented. In the solution of the damped forced vibration problem, the Newmark average acceleration method is used in the time history. In the damping effect, the Kelvin-Voigt viscoelastic model is used with the constitutive relations. In the numerical examples, the effects of material distribution parameter and dynamic parameters on the natural frequencies and forced vibration responses of functionally graded beams are obtained and compared with the results of the layered composite beam. Also, comparison studies are performed in order to validate the used formulations.
Keywords
functionally graded materials; layered materials; dynamic analysis; Timoshenko Beam Theory;
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Times Cited By KSCI : 1  (Citation Analysis)
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