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Ultrasound and eddy current data fusion for evaluation of carbon-epoxy composite delaminations

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This paper proposes the presentation of a data fusion method based on the evidence theory of Dempster-Shafer, applicable to the evaluation of the area of delamination from carbonepoxy composites due to impacts with energies between 0.5 J and 4 J. Two complementary methods for detection of delamination were used: determination of the change in propagation speed of Lamb waves generated by Hertzian contact and eddy current holography.

The obtained results were compared with the C-scan ultrasound method. While the area of delamination due to the impacts was overestimated by the ultrasound Lamb waves, it was underestimated by eddy current holography. However, the areas of delamination determined by data fusion were in good agreement with those obtained by the C-scan ultrasound method.
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Document Type: Research Article

Affiliations: 1 Nondestructive Testing Department, National Institute of R&D for Technical Physics, 47 D Mangeron Blvd, Iasi, 700050, Romania. grimbergphys-iasi.ro, asavinphys-iasi.ro, steigmannphys-iasi.ro, abrumaphys-iasi.ro., Tel: 4023 2430 680

Publication date: 2009-01-01

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