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چکیده
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This research conducts an in-depth stability assessment of a sector-shaped layered composite structure incorporating a spatially graded permeable center and nano-enhanced polymeric surface laminates. Various spatial configurations of carbon-based nanomaterials (carbon nanotubes [CNTs]) are examined across the outer layers, alongside three distinct internal porosity schemes within the central region. The mechanical formulation employs a layer-wise displacement model inspired by Murakami’s zig-zag approach, while aerodynamic interactions under supersonic conditions are modeled using a linear piston-based framework. The dynamic governing relations are formulated via Hamilton’s variational principle, accounting for multiple edge constraints such as fixed, hinged, and unconstrained boundaries. A numerical solution strategy based on differential quadrature method (DQM) is applied in both radial and angular directions. Parametric evaluations explore the effects of geometric proportions, thickness ratios, pore intensity, CNT and void distribution profiles, filler concentration, and boundary conditions on the onset of dynamic instability. In this study, the critical aerodynamic pressure (CAP) is computed to evaluate the flutter susceptibility of the structure under varying design parameters and CNTs dispersion schemes. The outcomes provide actionable insights for enhancing the aeroelastic resilience of curved aerospace components.
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