Aeroelastic tailoring
Passive aeroelastic control via directional stiffness in aircraft structures.
Aeroelastic tailoring involves designing an aircraft's structure with directional stiffness to passively manage aeroelastic deformations—whether static or dynamic—so that aerodynamic and structural performance is improved. This approach, also known as passive aeroelastic control, can help reduce weight and address issues like flutter, divergence, stress, roll reversal, control effectiveness, lift, drag, skin buckling, and fatigue.
The concept dates back to 1949, when Munk aligned the grain of a wooden propeller blade to produce beneficial deformation couplings during operation. Research into aeroelastic tailoring gained momentum in the late 1960s and has continued steadily since. Notable examples include the forward-swept wings of the X-29 and the Active Aeroelastic Wing. Today, composite materials are increasingly used in transport aircraft such as the Boeing 787, Airbus A380, and upcoming Airbus A350. Advances in composite laminate fabrication also open up new design possibilities that have yet to be fully tapped for optimizing aeroelastic performance and saving weight.
- First record
- 1949
- First record by
- Munk
- First record application
- wooden propeller blade with oriented grain
- Notable examples
- X-29 forward swept wings, Active Aeroelastic Wing
- Highlighted by
- Weisshaar
- Modern aircraft using composites
- Boeing 787, Airbus A380, upcoming Airbus A350
Lore & Background
According to Shirk et al., the first record of aeroelastic tailoring is from 1949 by Munk, who oriented the grain of his wooden propeller blade to create desirable deformation couplings when operated. In the late 1960s, there was a thrust in aeroelastic tailoring research, which has continued fairly steadily through to today. The forward swept wings of the X-29 and the Active Aeroelastic Wing are two aeroelastic tailoring examples highlighted by Weisshaar. Today the use of composite materials is becoming more prevalent in transport aircraft, including the Boeing 787, the Airbus A380, and the upcoming Airbus A350. Enhanced fabrication processes for composite laminates offer new design possibilities that have not been fully exploited for optimal aeroelastic performance and weight savings.
Reader's Guide
Aeroelastic tailoring has significance as a passive method to control aeroelastic deformation, offering benefits such as weight minimization and improvements in flutter, divergence, stress, roll reversal, control effectiveness, lift, drag, skin buckling, and fatigue. Its legacy is rooted in early work by Munk in 1949, with a sustained research thrust beginning in the late 1960s. Notable applications include the X-29 forward swept wings and the Active Aeroelastic Wing, as highlighted by Weisshaar. The increasing prevalence of composite materials in modern transport aircraft—such as the Boeing 787, Airbus A380, and upcoming Airbus A350—along with enhanced fabrication processes for composite laminates, presents new design possibilities that have not yet been fully exploited for optimal aeroelastic performance and weight savings. This indicates that aeroelastic tailoring remains an area with potential for further development.
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