Surface stress effects on the free vibration behavior of nanoplates

2011 ◽  
Vol 49 (11) ◽  
pp. 1204-1215 ◽  
Author(s):  
R. Ansari ◽  
S. Sahmani
Keyword(s):  
Free Vibration ◽  
Surface Stress ◽  
Stress Effects ◽  
Vibration Behavior

Investigation on the free vibration behavior of sandwich conical shells with reinforced cores

2021 ◽  
pp. 109963622110204
Author(s):  
Mehdi Zarei ◽  
Gholamhossien Rahimi ◽  
Davoud Shahgholian-Ghahfarokhi
Keyword(s):  
Free Vibration ◽  
Orientation Angle ◽  
Element Model ◽  
Filament Winding ◽  
Vertex Angle ◽  
Sandwich Shell ◽  
Cross Sectional ◽  
Conical Shells ◽  
Vibration Behavior ◽  
Axial Forces

The free vibration behavior of sandwich conical shells with reinforced cores is investigated in the present study using experimental, analytical, and numerical methods. A new effective smeared method is employed to superimpose the stiffness contribution of skins with those of the stiffener in order to achieve equivalent stiffness of the whole structure. The stiffeners are also considered as a beam to support shear forces and bending moments in addition to the axial forces. Using Donnell’s shell theory and Galerkin method, the natural frequencies of the sandwich shell are subsequently derived. To validate analytical results, experimental modal analysis (EMA) is further conducted on the conical sandwich shell. For this purpose, a method is designed for manufacturing specimens through the filament winding process. For more validation, a finite element model (FEM) is built. The results revealed that all the validations were in good agreement with each other. Based on these analyses, the influence of the cross-sectional area of the stiffeners, the semi-vertex angle of the cone, stiffener orientation angle, and the number of stiffeners are investigated as well. The results achieved are novel and can be thus employed as a benchmark for further studies.

On the free vibration behavior of nanocomposite laminated plates contained piece-wise functionally graded graphene-reinforced composite plies

2022 ◽  
Vol 253 ◽  
pp. 113784
Author(s):  
Berkane Saiah ◽  
Mourad Bachene ◽  
Mouloud Guemana ◽  
Yasser Chiker ◽  
Brahim Attaf
Keyword(s):  
Free Vibration ◽  
Functionally Graded ◽  
Laminated Plates ◽  
Vibration Behavior ◽  
Reinforced Composite

Free Vibration Behavior of Prestressed Beams

1986 ◽  
Vol 112 (2) ◽  
pp. 433-437 ◽  
Author(s):  
K. Kanaka Raju ◽  
G. Venkateswara Rao
Keyword(s):  
Free Vibration ◽  
Vibration Behavior ◽  
Prestressed Beams
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