An early scientific work on the subject was George Bryan's Theory of the Stability of a Rigid Aeroplane published in 1906. The second failure of Samuel Langley's prototype plane on the Potomac was attributed to aeroelastic effects (specifically, torsional divergence). The synthesis of aeroelasticity with thermodynamics is known as aerothermoelasticity, and its synthesis with control theory is known as aeroservoelasticity. Flutter of control surfaces is usually eliminated by the careful placement of mass balances. flutter which is the uncontained vibration that can lead to the destruction of an aircraft.Īeroelasticity problems can be prevented by adjusting the mass, stiffness or aerodynamics of structures which can be determined and verified through the use of calculations, ground vibration tests and flight flutter trials.control reversal where control activation produces an opposite aerodynamic moment that reduces, or in extreme cases, reverses the control effectiveness and.
divergence where the aerodynamic forces increase the angle of attack of a wing which further increases the force.Aircraft are designed to avoid the following aeroelastic problems: The study of aeroelasticity may be broadly classified into two fields: static aeroelasticity dealing with the static or steady state response of an elastic body to a fluid flow, and dynamic aeroelasticity dealing with the body's dynamic (typically vibrational) response.Īircraft are prone to aeroelastic effects because they need to be lightweight and withstand large aerodynamic loads. NASA testing a scale model Lockheed Electra in a wind tunnel for flutterĪeroelasticity is the branch of physics and engineering studying the interactions between the inertial, elastic, and aerodynamic forces occurring while an elastic body is exposed to a fluid flow.
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