Abstract
In this work, a laser ultrasound system is being developed for localized resonance measurements in heterogeneous materials. Specifically, the system is designed to excite ultrasound energy in microscale samples fabricated in materials that are spatially heterogeneous, thus exciting resonance modes locally in different areas of the sample. The samples can be made by additive manufacturing, as in the case of low density materials and acoustic metamaterials, or using traditional removal techniques such as EDM/FIB machining. The system has been benchmarked against previously analyzed samples made from different Ti and Ni alloys and found to produce resonances similar to those measured using traditional RUS. The system was also used to map the mode shapes of these samples for rapid and robust RUS of large scale samples. The system was then applied to detection of resonance modes in microscale samples analyzed in a previous immersion ultrasound experiment. The system design and benchmarking results will be given in this presentation.
How to Cite:
Cherry, M., Adebisi, R., Lesthaeghe, T. & Barrett, I., (2019) “Development of a localized resonance measurement system using laser-based ultrasound generation”, Review of Progress in Quantitative Nondestructive Evaluation .
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