Dynamic Analysis of Composite Sandwich Beams with a Frequency-Dependent Viscoelastic Core under the Action of a Moving Load

2021 ◽  
Vol 56 (6) ◽  
pp. 755-768
Author(s):  
Y. Karmi ◽  
Y. Khadri ◽  
S. Tekili ◽  
A. Daouadji ◽  
E. M. Daya
Keyword(s):  
Dynamic Analysis ◽  
Moving Load ◽  
Sandwich Beams ◽  
Frequency Dependent ◽  
Composite Sandwich ◽  
Viscoelastic Core

Vibration and thermal buckling of composite sandwich beams with viscoelastic core

2007 ◽  
Vol 81 (1) ◽  
pp. 60-69 ◽  
Author(s):  
V. Pradeep ◽  
N. Ganesan ◽  
K. Bhaskar
Keyword(s):  
Thermal Buckling ◽  
Sandwich Beams ◽  
Composite Sandwich ◽  
Viscoelastic Core

Spectral Finite Element Analysis of Sandwich Beams With Passive Constrained Layer Damping1

2002 ◽  
Vol 124 (3) ◽  
pp. 376-386 ◽  
Author(s):  
Gang Wang ◽  
Norman M. Wereley
Keyword(s):  
Finite Element ◽  
Frequency Response ◽  
Complex Modulus ◽  
Sandwich Beams ◽  
Response Functions ◽  
Frequency Dependent ◽  
Frequency Response Functions ◽  
Viscoelastic Core ◽  
Spectral Finite Element ◽  
Passive Constrained Layer Damping

We present a spectral finite element model (SFEM) for sandwich beams with passive constrained layer damping (PCLD) treatments. The viscoelastic core has a complex modulus that varies with frequency. The SFEM is formulated in the frequency domain using dynamic shape functions based on the exact displacement solutions from progressive wave methods, where we implicitly account for the frequency dependent complex modulus of the viscoelastic core. The SFEM results of natural frequencies and frequency response functions are compared to those calculated using conventional finite element (CFEM), where the Golla-Hughes-McTavish method is used to account for the frequency dependent complex modulus of a viscoelastic core. Also experimental data are used to validate both analyses using frequency response functions measured for two cantilevered sandwich beams with PCLD treatments having 50% and 75% coverage of the beam length. SFEM shows improved computational efficiency and accuracy, because many more elements must be incorporated into the CFEM for comparable accuracy.

Experimental dynamic analysis of composite sandwich beams with magnetorheological honeycomb core

2018 ◽  
Vol 176 ◽  
pp. 231-242 ◽  
Author(s):  
Felipe de Souza Eloy ◽  
Guilherme Ferreira Gomes ◽  
Antonio Carlos Ancelotti ◽  
Sebastião Simões da Cunha ◽  
Antonio José Faria Bombard ◽  
...  
Keyword(s):  
Dynamic Analysis ◽  
Sandwich Beams ◽  
Honeycomb Core ◽  
Composite Sandwich

scholarly journals Frequency Analysis of Vibrations of Composite Sandwich Beams with Viscoelastic Core

2019 ◽  
Author(s):  
Khadri Youcef ◽  
Tekili Sabiha ◽  
Karmi Yacine ◽  
Daya El Mostafa ◽  
Daouadji Ali
Keyword(s):  
Loss Factor ◽  
Plate Theory ◽  
Moving Load ◽  
Thickness Ratio ◽  
Dynamic Responses ◽  
Complex Eigenvalue ◽  
Sandwich Beams ◽  
Vibration Behavior ◽  
Composite Layers ◽  
Viscoelastic Core

The present study is concerned with the dynamic analysis of sandwich beams, with a viscoelastic core between composite layers and subjected to a moving load. The governing equations are derived by application of Hamilton principle and solved by finite element method. The coupled system of equations is integrated numerically by the Newmark method. Facial composites are modeled using classical plate theory and the kernel using Timoshenko’s theory. This study deals with free and forced vibrations of the sandwich beams by considering the frequency according to the viscoelastic properties in frequency- domain and the numerical asymptotic method is employed in order to solve the complex eigenvalue problem. The influences of viscoelastic loss factor, orientation fiber of the composite layers and thickness ratio on the dynamic responses of sandwich beams are investigated. The results reported in this paper show that the viscoelastic loss factor has a significant effect on the vibration behavior involving the improvement of the damping of the structure. The influence of fiber orientation on vibration behavior showed that the damping of the structure could be improved by adopting a better configuration of the composite layers. The results obtained with the effect of the thickness ratio show that the sandwich structure has a greater dissipative vibratory energy capacity for the low viscoelastic thickness values.

scholarly journals Dynamic analysis of laminated composite sandwich plates with a circular hole

2021 ◽  
Vol 1136 (1) ◽  
pp. 012050
Author(s):  
Deepak Kumar ◽  
Vinayak Kallannavar ◽  
Subhaschandra Kattimani ◽  
B. Rajendra Prasad Reddy
Keyword(s):  
Dynamic Analysis ◽  
Circular Hole ◽  
Laminated Composite ◽  
Sandwich Plates ◽  
Composite Sandwich ◽  
Composite Sandwich Plates
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