Inversion technique for an all-optical inspection of materials' elastic properties

Sorazu, B. , Culshaw, B. and Atique, S. H. (2006) Inversion technique for an all-optical inspection of materials' elastic properties. In: Smart Structures and Materials 2006, San Diego, CA, USA, 26 Feb – 2 Mar 2006, pp. 166-177. (doi: 10.1117/12.658433)

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Publisher's URL: http://dx.doi.org/10.1117/12.658433

Abstract

In this paper we present a complete non-contact, all-optical inspection tool, for the extraction of the principal mechanical characteristics of plate-like structural materials (effective stiffness, Poisson ratio and plate's thickness). Broadband ultrasonic guided waves - Lamb waves - are optically generated and detected for incremental source detector distances. A two dimensional Fourier transform is applied to these measured time signals in order to extract dispersion information, which is highly affected by elastic properties as well as by sample geometry. The elastic properties and thickness of the structure under test are obtained from this experimentally extracted dispersion information, by an inversion technique which is presented and analysed in the paper. These values are verified with a complementary experiment. Monitoring changes in the estimated material properties could be used to indicate changes in the structural condition.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Sorazu Lucio, Dr Borja
Authors: Sorazu, B., Culshaw, B., and Atique, S. H.
College/School:College of Science and Engineering > School of Physics and Astronomy
ISSN:0277-786X

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