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

Sorazu, B.L. and Culshaw, B. and Atique, S.H. (2006) Inversion technique for an all-optical inspection of materials' elastic properties. In: SPIE Smart Structures and Materials 2006, 2006-02-27 - 2006-02-27, San Diego, CA.

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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 or Workshop Item (Paper)
ID code: 37695
Keywords: mechanical characteristics, lamb waves , inversion technique , optical, Electrical engineering. Electronics Nuclear engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Unknown Department
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 16 Feb 2012 12:19
    Last modified: 04 Oct 2012 17:19
    URI: http://strathprints.strath.ac.uk/id/eprint/37695

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