Variable flight velocity contributions to elastic/ viscoelastic lifting surface control effectiveness

Ngoc Tuan Nguyen, Craig G. Merrett, Harry H. Hilton, Pawan Satish Chaugule

Research output: Contribution to conferencePaperpeer-review

Abstract

The paper reports on analyses regarding control effectiveness of viscoelastic wings and control surfaces, such as ailerons, flaps, horizontal and vertical tail surfaces, etc. It has been a well established fact that elastic lifting surfaces are subject to loss of control effectiveness and control reversal at certain flight speeds, which depend on aerodynamic, structural and material properties [1]. Such elastic analyses are here extended to linear viscoelastic materials under quasi-static, dynamic, and sudden and gradual loading conditions. In elastic wings the critical parameter is the velocity at which control reversal takes place. Since elastic formulations constitute viscoelastic initial conditions, viscoelastic reversal may occur at speeds, but furthermore does so in time at 0 < tcr ≤ ∞. Variable flight velocities that may occur during rolling maneuvers are also taken into account.

Original languageEnglish (US)
DOIs
StatePublished - 2014
Event55th AIAA/ASMe/ASCE/AHS/SC Structures, Structural Dynamics, and Materials Conference - SciTech Forum and Exposition 2014 - National Harbor, MD, United States
Duration: Jan 13 2014Jan 17 2014

Other

Other55th AIAA/ASMe/ASCE/AHS/SC Structures, Structural Dynamics, and Materials Conference - SciTech Forum and Exposition 2014
Country/TerritoryUnited States
CityNational Harbor, MD
Period1/13/141/17/14

Keywords

  • Aero-viscoelasticity
  • Aileron effectiveness
  • Control reversal
  • Viscoelasticity

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanics of Materials
  • Building and Construction
  • Architecture

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