F-111C Lower Wing Skin Bonded Composite Repair Substantiation Testing.

Abstract

Experimental testing was undertaken to verify a bonded composite repair to a crack in the primary structure of a F-111C aircraft of the Royal Australian Air Force. The flight safety was compromised by a crack in the lower wing skin reducing the structure residual strength below the Design Limit level. Two levels of representative specimens were designed to incorporate the complex local geometry in the lower wing skin. They were tested in several configurations (ambient, high and low temperature) under static and cyclic loads with, and without, repaired cracks. Extensive strain survey data was obtained for both types of specimens and their static residual strength was shown to be restored by the repair. Cyclic loading tests of specimens with the repair also demonstrated good durability and damage tolerance, with crack growth data providing a recommended inspection interval for remaining aircraft

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1996
Accession Number
ADA324095

Entities

People

  • K. Walker
  • R. Boykett

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Composite Materials
  • Cyclic Loads
  • Damage
  • Damage Tolerance
  • Geometry
  • Inspection
  • Intervals
  • Low Temperature
  • Mechanical Structure
  • Residuals
  • Resilience

Readers

  • Aerospace Engineering
  • Facility/Structural Engineering.
  • Materials Science (Mechanical Engineering).