Method for detecting fiber misalignment in composite manufacturi

Optics: measuring and testing – With plural diverse test or art

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25022711, G01J 342

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active

059367180

ABSTRACT:
A method for detecting misalignment of initially-aligned fiber filaments in a composite. An optical fiber is placed among the fiber filaments in the composite, light is directed into the optical fiber, the intensity of the light in the optical fiber is measured during subsequent composite processing, and attenuation in such light intensity is ascertained which indicates such misalignment (e.g., wrinkling, bending, buckling, porosity, delamination and the like) is being detected during such processing. In another preferred method, before-processing and after-processing x-ray images are taken of an x-ray-attenuating fiber which has been placed among x-ray-transparent fiber filaments in a composite.

REFERENCES:
patent: 4047029 (1977-09-01), Allport
patent: 5102609 (1992-04-01), Miller et al.
patent: 5184009 (1993-02-01), Wright et al.

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