|
Title
|
Free vibration analysis of porous variable-thickness rotating annular plates with randomly distributed agglomerated CNT-RC facesheets
|
|
Type
|
JournalPaper
|
|
Keywords
|
Sandwich structure, Vibrations, Annular plate, Rotating plate, Variable thickness, Porous materials, Agglomeration effect.
|
|
Abstract
|
This study investigates the free vibration behavior of rotating circular sandwich plates featuring a variable-thickness porous core and composite facesheets reinforced with randomly distributed and agglomerated carbon nanotubes (CNTs). Three porosity distribution patterns—monotonous, symmetric, and non-symmetric—are considered for the core. The stochastic dispersion and agglomeration of CNTs within the facesheets are also taken into account. The analysis is based on the first-order shear deformation theory (FSDT), and the equations of motion are derived using Hamilton’s principle and solved via the generalized differential quadrature method (GDQM). The influence of several parameters—including porosity patterns, CNT mass fraction and agglomeration, thickness variation, and geometric factors—on the natural frequencies of the plate is comprehensively examined. The results reveal that while increased porosity tends to slightly raise the natural frequencies, a higher CNT mass fraction significantly enhances them. These findings are valuable for the design and optimization of advanced structural components in aerospace, defense, and marine applications.
|
|
Researchers
|
Saeed Amir (Second Researcher), Iman Dadoo (First Researcher), Ehsan Arshid (Third Researcher)
|