Sonic Fatigue Design Techniques for Advanced Composite Aircraft Structures

Abstract

A combined analytical and experimental program was conducted in order to develop a semi-empirical sonic fatigue design method for curved and flat graphite-epoxy skin-stringer panels. A range of multi-bay panels was subjected to high intensity noise environments in a progressive-wave tube. Shaker tests were also performed in order to provide additional random fatigue data. Finite- element analyses were carried out on the test panel designs, generating static strains and frequencies. Multiple stepwise regression analysis was used to develop the sonic fatigue design method. Design equations and a nomograph are presented. Comparisons of sonic fatigue resistance between graphite and aluminum panels were also carried out. The design method developed is presented as a self-contained section in this report and is suitable for practical design use.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1980
Accession Number
ADA090553

Entities

People

  • Ian Holehouse

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Composite Materials
  • Computational Science
  • Computer Programs
  • Databases
  • Dynamic Response
  • Elastic Properties
  • Failure Mode And Effect Analysis
  • Finite Element Analysis
  • Graphitic Materials
  • Laminates
  • Materials Processing
  • Measurement
  • Mechanical Working
  • Modulus Of Elasticity
  • Plastic Explosives
  • Strain Gages

Readers

  • Structural Dynamics.
  • Structural Health Monitoring of Composite Structures.