Shock and Vibration

Shock and Vibration / 2013 / Article

Open Access

Volume 20 |Article ID 164539 | 10 pages | https://doi.org/10.3233/SAV-130798

Fractal Dimension-Based Damage Imaging for Composites

Received06 Jan 2013
Revised28 Mar 2013
Accepted13 Apr 2013

Abstract

In this paper, a damage imaging algorithm based on fractal dimension is developed for quantitative damage detection of composite structures. Box-counting dimension, a typical fractal dimension, is employed to analyze the difference of Lamb wave signals, extract damage feature and define damage index. An enhanced reconstruction algorithm for probabilistic inspection of damage is developed for damage imaging. Experimental investigation in a composite laminate and a stiffened composite panel shows that the developed algorithm could quantitatively predict the location and size of not only single but also multiple damages. The influence of parameters in the developed algorithm on the imaging quality and accuracy is studied, and reference values for parameters are presented.

Copyright © 2013 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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