Dynamic Analysis of Variable-Stiffness Laminated Composite Plates with an Arbitrary Damaged Area in Supersonic Airflow

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Detalles Bibliográficos
Publicado en:	Aerospace vol. 12, no. 9 (2025), p. 802-829
Autor principal:	Zou Pingan
Otros Autores:	Shao Dong, Sun Ningze, Liang Weige
Publicado:	MDPI AG
Materias:	Structural engineering Accuracy Statistical energy analysis Air flow Stiffness Civil engineering Equilibrium Flutter Chebyshev approximation Laminar composites Laminates Structural design Piston theory Stress concentration Composite materials Penalty function Boundary value problems Shear deformation Plates (structural members) Quadratures Vibration analysis Composite structures Finite element analysis Deformation Structural stability
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Descripción
Resumen:	In response to the urgent need for performance predictions of damaged aerospace structures, this study undertakes a comprehensive investigation into the flutter characteristics of damaged variable-stiffness composite laminate (VSCL) plates. The governing boundary value problem for the dynamics of damaged VSCL plates is formulated using first-order shear deformation theory (FSDT). Additionally, the first-order piston theory is utilized to model the aerodynamic pressure in supersonic airflow. A novel coupling methodology is developed through the integration of penalty function methods and irregular mapping techniques, which effectively establishes the interaction between damaged and undamaged plate elements. The vibration characteristics and aeroelastic responses are systematically analyzed using the Chebyshev differential quadrature method (CDQM). The validity of the proposed model is thoroughly demonstrated through comparative analyses with the existing literature and finite element simulations, confirming its computational accuracy and broad applicability. A notable characteristic of this research is its ability to accommodate arbitrary geometric configurations within damaged regions. The numerical results unequivocally demonstrate that accurately predicting the flutter characteristics of damaged VSCL plates constitutes an effective strategy for mitigating structural stability degradation. This approach provides valuable insights for aerospace structural design and maintenance.
ISSN:	2226-4310
DOI:	10.3390/aerospace12090802
Fuente:	Advanced Technologies & Aerospace Database