Damage detection in a sandwich composite beam using wavelet transforms

Tariq A. Dawood; R. Ajit Shenoi; Sandor M. Veres; Melin Sahin; Mark J. Gunning

doi:10.1117/12.482823

1 August 2003 Damage detection in a sandwich composite beam using wavelet transforms

Tariq A. Dawood, R. Ajit Shenoi, Sandor M. Veres, Melin Sahin, Mark J. Gunning

Proceedings Volume 5049, Smart Structures and Materials 2003: Modeling, Signal Processing, and Control; (2003) https://doi.org/10.1117/12.482823
Event: Smart Structures and Materials, 2003, San Diego, California, United States

Abstract

There is a growing interest in developing non-destructive damage detection methods for damage assessment of composite structures, especially in the aerospace and marine industries. Although damage detection of composite laminates has been widely investigated, little work has been carried out on sandwich composite configurations. A technique using the Lipschitz exponent, which is estimated by wavelet transforms, as a damage sensitive signal feature is outlined here to identify damage in sandwich composites. It is based on the fact that damage causes singularities to appear in the structure’s dynamic response which can be identified, and its severity estimated, using the Lipschitz exponent. In order to demonstrate this technique, damage in cantilevered fibre reinforced plastic (FRP) sandwich beams is investigated both numerically and experimentally.

Citation Download Citation

Tariq A. Dawood, R. Ajit Shenoi, Sandor M. Veres, Melin Sahin, and Mark J. Gunning "Damage detection in a sandwich composite beam using wavelet transforms", Proc. SPIE 5049, Smart Structures and Materials 2003: Modeling, Signal Processing, and Control, (1 August 2003); https://doi.org/10.1117/12.482823

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