Multi-objective optimal design of hybrid viscoelastic/composite sandwich beams by using the generalized differential quadrature method and the non-dominated sorting genetic algorithm II

2017 ◽  
Vol 56 (4) ◽  
pp. 885-901 ◽  
Author(s):  
Aytac Arikoglu
Keyword(s):  
Genetic Algorithm ◽  
Optimal Design ◽  
Differential Quadrature Method ◽  
Differential Quadrature ◽  
Sandwich Beams ◽  
Quadrature Method ◽  
Viscoelastic Composite ◽  
Multi Objective ◽  
Composite Sandwich ◽  
Generalized Differential

Vibration analysis of curved composite sandwich beams with viscoelastic core by using differential quadrature method

2018 ◽  
Vol 22 (3) ◽  
pp. 743-770 ◽  
Author(s):  
Ozgur Demir ◽  
Demet Balkan ◽  
Rahim Can Peker ◽  
Muzaffer Metin ◽  
Aytac Arikoglu
Keyword(s):  
Vibration Analysis ◽  
Virtual Work ◽  
Differential Quadrature Method ◽  
Differential Quadrature ◽  
Beam Model ◽  
Sandwich Beams ◽  
Quadrature Method ◽  
Modal Strain Energy ◽  
Viscoelastic Core ◽  
Generalized Differential

This paper focuses on the vibration analysis of three-layered curved sandwich beams with elastic face layers and viscoelastic core. First, the equations of motion that govern the free vibrations of the curved beams together with the boundary conditions are derived by using the principle of virtual work, in the most general form. Then, these equations are solved by using the generalized differential quadrature method in the frequency domain, for the first time to the best of the authors’ knowledge. Verification of the proposed beam model and the generalized differential quadrature solution is carried out via comparison with the results that already exist in literature and the ANSYS finite element solution combined with the modal strain energy method. The effect of system parameters, i.e. layer thicknesses, the lamination angle of layers and the curvature on the vibration and damping characteristics of a curved sandwich beam with laminated composite face layers and a frequency dependent viscoelastic core is investigated in detail.

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