Dynamics and Aeroelasticity of Composite Structures.

Abstract

An analytical and experimental investigation was made of the aeroelastic flutter and divergence behavior of graphite/epoxy forward swept wings with rigid body pitch and plunge freedoms present. A complete, two-sided 30-degree forward swept wing aircraft model was constructed and mounted with low friction bearing in a low speed wind tunnel. Four different ply layup wings could be interchanged on the model. Wind tunnel tests on the free flying models revealed body freedom flutter, bending torsion flutter, and a support dynamic instability which could be eliminated by proper adjustment of the support stiffness. Good agreement with linear theory was found for the observed instabilities.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1986
Accession Number
ADA172922

Entities

People

  • Gun-shing Chen
  • John Dugundji

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aeronautics
  • Air Force
  • Aircraft Models
  • Aircrafts
  • Astronautics
  • Composite Materials
  • Composite Structures
  • Dynamics
  • Friction
  • Graphitic Materials
  • Instability
  • Materials
  • Materials Laboratories
  • Swept Wings
  • Torsion
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Structural Health Monitoring of Composite Structures.