Aeroelastic tailoring - Creative uses of unusual materials

This paper discusses the fundamental aspects of the use of aeroelastic tailoring to enhance the performance of flexible fixed wing aircraft. Tailoring with advanced composites is seen as part of a natural evolutionary process in the everchanging field of design. Among topics discussed are: static divergence; lift effectiveness; drag reduction; control effectiveness; and, vibration and flutter. In addition, terminology is reviewed, together with descriptive formulas that characterize stiffness coupled structures. Finally, a summary of design features favorable to different facets of aeroelastic tailoring is given to illustrate conflicts and compromises that must be considered.

[1]  Stephen M. Batill,et al.  FASTOP: A Flutter and Strength optimization Program for Lifting-Surface Structures , 1977 .

[2]  T. A. Weisshaar,et al.  Dynamic stability of flexible forward swept wing aircraft , 1983 .

[3]  Franklin W Diederich,et al.  Divergence of swept wings , 1948 .

[4]  Manuel Stein,et al.  Torsion and transverse bending of cantilever plates , 1951 .

[5]  William Fuller Brown,et al.  Interpretation of Torsional Frequencies of Crystal Specimens , 1940 .

[6]  E. H. Mansfield,et al.  The Fibre Composite Helicopter Blade , 1979 .

[7]  T. A. Weisshaar,et al.  Control of aeroelastic instabilities through stiffness cross-coupling , 1986 .

[8]  Robert E. Kielb,et al.  Effects of Warping and Pretwist on Torsional Vibration of Rotating Beams , 1984 .

[9]  T. A. Weisshaar,et al.  Vibration Tailoring of Advanced Composite Lifting Surfaces , 1985 .

[10]  R. Hearmon,et al.  The significance of coupling between shear and extension in the elastic behaviour of wood and plywood , 1943 .

[11]  Maurice A. Biot,et al.  Low-Speed Flutter and Its Physical Interpretation , 1948 .

[12]  J. Crisp,et al.  The Equation of Energy Balance for Fluttering Systems with Some Applications in the Supersonic Regime , 1959 .

[13]  Terrence A. Weisshaar,et al.  VIBRATION AND FLUTTER OF ADVANCED COIIPOSITE LIFTING SURFACES , 1983 .

[14]  F. Austin,et al.  AEROELASTIC TAILORING OF ADVANCED COMPOSITE LIFTING SURFACES IN PRELIMINARY DESIGN , 1976 .

[15]  T. Weisshaar Aeroelastic Tailoring of Forward Swept Composite Wings , 1981 .

[16]  D. Gimmestad Aeroelastic tailoring of a composite winglet for KC-135 , 1981 .

[17]  Jr. N. Krone Forward swept wing flight demonstrator , 1980 .

[18]  William E. Triplett Aeroelastic Tailoring Studies in Fighter Aircraft Design , 1980 .

[19]  J. H. Wykes,et al.  Rigid body-structural mode coupling on a forward swept wing aircraft , 1982 .