Aeroelasticity of Composite Structures in Supersonic Flow

Aeroelasticity of composite structures in supersonic flow addresses the dynamic interaction between aerodynamic forces, structural elasticity and inertial effects in high-speed regimes. Composite laminates, incorporating tailored fibre orientations, functionally graded materials and nanofillers, offer high stiffness-to-weight ratios but also introduce anisotropic responses under transonic and supersonic pressures. In these regimes, aerodynamic loading is frequently modelled by piston theory, capturing first-order pressure distributions on panels, shells and cylindrical shells. Principal aeroelastic instabilities include static divergence, where steady aerodynamic loading overwhelms structural stiffness, and dynamic flutter, characterised by self-excited oscillations that can rapidly grow to destructive amplitudes. Thermal loading and shock interactions further complicate stability boundaries, while active control using piezoelectric actuators and embedded sensors has emerged as a promising strategy to raise critical flutter Mach numbers. Optimisation of lay-ups, curvilinear fibre paths and grading of material properties seeks to expand safe flight envelopes for supersonic transport and high-Mach-number defence platforms.

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Aeroelasticity of Composite Structures in Supersonic Flow publication trend

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Technical terms

Aeroelasticity: The study of interactions among aerodynamic, elastic and inertial forces on a deformable structure.

Flutter: A dynamic instability in which aerodynamic forces couple with structural vibration to produce self-excited oscillations.

Divergence: A static aeroelastic instability where steady aerodynamic loading causes uncontrolled deflection of a structure.

Composite laminate: A layered material system of fibres and matrix engineered to achieve anisotropic mechanical properties.

Supersonic flow: Fluid flow at speeds exceeding the local speed of sound, characterised by compressibility and shock phenomena.

Piston theory: A simplified aerodynamic model that relates pressure on a surface in supersonic flow to local normal velocity components.

Functionally graded material (FGM): A composite in which material properties vary continuously through the thickness to optimise performance.

Piezoelectric actuator: A device that converts electrical signals into mechanical strain, enabling active shape and stiffness control.

Graphene nanoplatelet: A two-dimensional carbon nanomaterial used to reinforce polymers, enhancing stiffness, strength and thermal conductivity.

References

1. Analytical modeling of panel flutter and active control in supersonic variable stiffness composite laminates. Mechanics of Advanced Materials and Structures (2022).
2. Active Flutter Suppression and Aeroelastic Response of Functionally Graded Multilayer Graphene Nanoplatelet Reinforced Plates with Piezoelectric Patch. Applied Sciences (2022).
3. Aeroelastic flutter analysis of functionally graded spinning cylindrical shells reinforced with graphene nanoplatelets in supersonic flow. Materials Research Express (2021).