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Updated: Jul 16, 2025
09:38
Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets
Published on: November 7, 2016
8.8K
Large Amplitude Vibration of FG-GPL Reinforced Conical Shell Panels on Elastic Foundation
1Department of Naval Architecture and Ocean Engineering, Hongik University, Jochiwon, Sejong 30016, Republic of Korea.
Materials (Basel, Switzerland)
|September 9, 2023
Summary
This study explores the nonlinear free vibration of graphene platelet (GPL)-reinforced composite conical panels on elastic foundations. Findings reveal significant influences of foundation stiffness, GPL distribution, and panel geometry on vibration characteristics.
Area of Science:
- Composite Materials Science
- Mechanical Engineering
- Vibration Analysis
Background:
- Functionally graded (FG) composite structures reinforced by graphene platelets (GPL) offer superior properties for advanced applications.
- Existing research predominantly focuses on beams, plates, and cylindrical panels, often using numerical methods like DQM and FEM.
- Investigating FG-GPL-reinforced composite (RC) conical panels, especially their nonlinear vibration, remains an area needing further exploration.
Purpose of the Study:
- To investigate the nonlinear free vibration of FG-GPL-reinforced composite conical panels on an elastic foundation.
- To develop and validate a novel 2-D planar meshfree method for analyzing these complex structures.
- To analyze the impact of various parameters on the vibration behavior of these advanced composite panels.
Main Methods:
- A 2-D planar meshfree method was developed for nonlinear free vibration analysis.
- The first-order shear deformation shell theory and von-Kármán nonlinearity were employed.
- The conical neutral surface was transformed into a 2-D rectangular plane, and MITC3+ shell elements were used to mitigate shear-membrane locking. A three-step direct iterative scheme solved the nonlinear modal equations.
Main Results:
- The developed meshfree method showed good agreement with the differential quadrature method (DQM) in benchmark comparisons.
- Nonlinear free vibration characteristics are significantly influenced by elastic foundation stiffness.
- The amount and dispersion pattern of GPLs, panel geometry, and boundary conditions critically affect the vibration behavior.
Conclusions:
- The 2-D planar meshfree method provides a reliable approach for analyzing nonlinear free vibration of FG-GPLRC conical panels.
- Elastic foundation, GPL characteristics, panel geometry, and boundary conditions are key factors governing the dynamic response.
- This research offers valuable insights for designing advanced composite conical panel structures with tailored vibration properties.
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