Accession Number:

AD0816482

Title:

DETECTION OF FLAWS IN METAL-HONEYCOMB STRUCTURES BY MEANS OF LIQUID CRYSTALS,

Descriptive Note:

Corporate Author:

ARMY MISSILE COMMAND REDSTONE ARSENAL AL SYSTEMS RESEARCH DIRECTORATE

Personal Author(s):

Report Date:

1967-06-01

Pagination or Media Count:

26.0

Abstract:

Cholesteric liquid crystals are compounds that go through a transition phase where they exhibit the flow characteristics of a liquid while retaining much of the molecular order of a crystalline solid. Since these materials have the ability to reflect iridescent colors dependent upon the temperature of their environment, they can be used to project a visual color picture of thermal gradients associated with material discontinuities. This report examines the nature of liquid crystals, the development of very sensitive crystal blends, and their application in non-destructive bond inspection of aluminum honeycomb composite structures. Author

Subject Categories:

  • Fabrication Metallurgy
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE