Liquid Crystals for Flaw Detection in Composites

JA Charles

doi:10.1520/STP36025S

SYMPOSIA PAPER Published: 01 December 1979

STP36025S

Liquid Crystals for Flaw Detection in Composites

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Liquid crystals have been investigated as an inexpensive nondestructive testing (NDT) technique for composite materials. By imaging the surface temperature distribution on both cyclically loaded and unloaded materials, subsurface flaws are found to be detectable. For specimens under load, likely damage locations and subsequent damage development can be determined. Cut fibers, inclusions, and geometric discontinuities served as flaws. Fiber glass/epoxy and graphite/epoxy composites were tested. It was found that liquid crystals can be used as an alternative to other NDT methods in many cases.

Author Information

Charles, JA

The Ohio State University, Columbus, Ohio

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Details

Developed by Committee: D30

Pages: 72–82

DOI: 10.1520/STP36025S

ISBN-EB: 978-0-8031-4761-4

ISBN-13: 978-0-8031-0527-0

Liquid Crystals for Flaw Detection in Composites

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