Holographic Interferometry of CFRP Wing Tips.

Abstract

Holographic interferometry has been used to examine seven experimental Harrier ferry-tips primarily for defects in core to skin bonding. With increasing experience, the quality of the holograms recorded has improved, and although the interference patterns formed when the structure is warmed are often complicated, discontinuities are readily observed. A number of suspected defects have been found which are virtually undetectable using standard radiographic techniques. The most prominent of these are the long straight anomalies visible on all but the first sample examined; it is thought that they may be due to overlapping sheets of film adhesive but this has not yet been established with certainty. An ultrasonic scan of one sample also failed to detect it. Small circular patterns, possibly indicating debonds, have been found in a number of places. A group of large anomalies observed on one sample were confirmed by radiography. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1978
Accession Number
ADA074745

Entities

People

  • M. Marchant

Organizations

  • Royal Aircraft Establishment

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Emissions
  • Aircrafts
  • Argon Lasers
  • Carbon Fiber Reinforced Polymer
  • Carbon Fibers
  • Composite Materials
  • Discontinuities
  • Foreign Languages
  • Holograms
  • Honeycomb Cores
  • Lasers
  • Materials
  • Mirrors
  • Optical Equipment
  • Photographs
  • Surfaces
  • Wing Tips

Fields of Study

  • Physics

Readers

  • Educational Psychology
  • Optical Physics and Photonics.
  • Structural Health Monitoring of Composite Structures.