Method of testing composite materials for structural damage

Details Method of testing composite materials for structural damage Method of testing composite materials for structural damage

1985-05-20

1989-06-06

Tarcza, Thomas H.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

G01L 124

Patent

active

048360309

ABSTRACT:
A method of testing composite materials for structural damage. A plurality of optical fibers are embedded in the composite material in predetermined patterns and light is introduced into one end of each fiber. A computer-connected optical receiver disposed in light-collecting relation to the opposite end of each fiber senses the presence or absence of light emerging therefrom. Detection by the computer that light has passed through any given fiber indicates that the composite is free of damage in the area along the extent of that fiber. If light is not detected emerging from any given fiber, this indicates that damage has occurred in that part of the composite structure within which that particular fiber is embedded.

REFERENCES:
patent: 3910105 (1975-10-01), Hoffstedt
Claus et al., "Nondestructive Evaluation of Composites . . . ", Proc. IEEE, 3/31-4/3/85, [abstract only].
Wade et al., "Interferometric Techniques . . . ", Conf. Paper, 1983, [abstract only].
Crane et al., "Fiber Optics for a Damage Assessment . . . ", Conf. Paper, 1983, [abstract only].

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