Aeroelastic Properties of Straight and Forward Swept Graphite/Epoxy Wings.
Abstract
The aeroelastic deformation, divergence and flutter behavior of rectangular, graphite/epoxy, cantilevered plate type wings at zero sweep and thirty degrees of forward sweep is investigated for incompressible flow. Since the wings have varying amounts of bending stiffness, torsion stiffness and bending-torsion stiffness coupling, they each have unique aeroelastic properties. A five mode Rayleigh-Ritz formulation is used to calculate the equation of motion. From this equation static deflection, steady airload deflection, divergence velocities, natural frequencies and flutter velocities are calculated. Experimental two dimensional lift and drag curve data and approximations to three dimensional aerodynamics are used to calculate the aerodynamic forces for the steady airload analysis. The Weissinger L-Method for three dimensional aerodynamic forces is used in the divergence analysis. The V-g method is used to make flutter and natural frequency calculations. Tests on a static loading apparatus gave static deflections, while wind tunnel tests gave steady airload deflections for the wings at zero sweep, and divergence and flutter behavior data for all wings at both zero sweep and thirty degrees forward sweep.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1983
- Accession Number
- ADA127014
Entities
People
- Brian Jerome Landsberger
Organizations
- Air Force Institute of Technology