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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

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Non contact material evaluation for characterisation and wear detection using laser generated ultrasound and interferometric detection

Thursby, G.J. and Culshaw, B. and Sorazu, B.L. and Atique, S.H. and Dong, F. (2004) Non contact material evaluation for characterisation and wear detection using laser generated ultrasound and interferometric detection. In: SPIE Conference on Smart Structures and Materials 2004, 2004-03-15 - 2004-03-18.

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Abstract

This paper describes an all optical non-contact technique to determine material properties in a mechanical structure. Using optical generation of ultrasound and interferometric optical detection to determine the dispersion curves for acoustic (Lamb) waves, readily available numerical algorithms have produced values of Young's Modulus and Poisson ratio with confidence limits of a few per cent. The approach may be applied to inspection regions with dimension in the range microns to centimetres.