27 July 2004 Noncontact material evaluation for characterization and wear detection using laser-generated ultrasound and interferometric detection
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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 percent. The approach may be applied to inspection regions with dimension in the range microns to centimetres.
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Graham Thursby, Graham Thursby, Brian Culshaw, Brian Culshaw, Borja Sorazu, Borja Sorazu, Syed Atique, Syed Atique, Fengzhong Dong, Fengzhong Dong, } "Noncontact material evaluation for characterization and wear detection using laser-generated ultrasound and interferometric detection", Proc. SPIE 5384, Smart Structures and Materials 2004: Smart Sensor Technology and Measurement Systems, (27 July 2004); doi: 10.1117/12.549024; https://doi.org/10.1117/12.549024
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