Damage Mechanisms and Non-Destructive Testing in the Case of Water Ingress in CF-18 Flight Control Surfaces

Abstract

Most service failures of adhesive bonded aircraft structures have been attributed to environmental degradation of bonded joints exposed to moist conditions. High humidity normally leads to plasticisation of the adhesive and an associated reduction of mechanical properties recoverable upon drying. Conversely, direct water ingress causes permanent adhesive bond degradation. Very little is known of the degradation mechanisms experienced with direct water ingress; however, this knowledge is required to establish the inspection requirements and for fielding nondestructive testing (NDT) techniques. This technical memorandum details the possible damage mechanisms and the results obtained with various nondestructive testing techniques tested during the course of the project.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2000
Accession Number
ADA388125

Entities

People

  • J. S. Giguere

Organizations

  • Defence Research and Development Canada

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Adhesives
  • Aircrafts
  • Bonded Joints
  • Chemistry
  • Corrosion Resistance
  • Failure Mode And Effect Analysis
  • High Humidity
  • Honeycomb Cores
  • Humidity
  • Materials
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Mechanical Properties
  • National Security
  • Nondestructive Testing
  • Test Methods

Readers

  • Surface Coatings Technology.
  • Systems Analysis and Design