Advances in electromagnetic models for three-dimensional nondestructive evaluation of advanced composites

In past work we have developed a rigorous electromagnetic model and an inversion algorithm for the three-dimensional NDE of advanced composite materials. This approach extends Victor Technologies’ work in eddy-current NDE of conventional metals, and allows one to determine in localized regions the f...

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Bibliographic Details
Main Authors: Sabbagh, Harold A., Murphy, R. Kim, Sabbagh, Elias H.
Format: Conference Proceeding
Language:English
Subjects:
Algorithms
Composite materials
Eddy current testing
Eddy currents
Graphite fiber reinforced plastics
Graphite-epoxy composites
Inverse problems
Moisture content
Nondestructive testing
Three dimensional composites
Three dimensional models
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Summary:In past work we have developed a rigorous electromagnetic model and an inversion algorithm for the three-dimensional NDE of advanced composite materials. This approach extends Victor Technologies’ work in eddy-current NDE of conventional metals, and allows one to determine in localized regions the fiber-resin ratio in graphite-epoxy, and to determine those anomalies, e.g., delaminations, broken fibers, moisture content, etc., that can be reconstructed by our inversion method. In developing the model, we applied rigorous electromagnetic theory to determine a Green’s function for a slab of anisotropic composite material, and then determine the integral relations for the forward and inverse problems using the Green’s function. In addition, we have given examples of the solution of forward and inverse problems using these algorithms.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4940594