Excitation and sensing of Lamb waves in very thin metals and nuclear cladding material using fully non-contact PL-SLDV system

Elsa Z. Compton; Andrew P. Campbell; Pei-Kang Sun; Lingyu Yu

doi:10.1117/12.2612634

19 April 2022 Excitation and sensing of Lamb waves in very thin metals and nuclear cladding material using fully non-contact PL-SLDV system

Elsa Z. Compton, Andrew P. Campbell, Pei-Kang Sun, Lingyu Yu

Author Affiliations +

Proceedings Volume 12048, Health Monitoring of Structural and Biological Systems XVI; 1204805 (2022) https://doi.org/10.1117/12.2612634
Event: SPIE Smart Structures + Nondestructive Evaluation, 2022, Long Beach, California, United States

Abstract

This paper studies the actuation and sensing of Lamb waves in thin metal plates, including those made of nuclear grade Zircaloy cladding material and carbon fiber reinforced polymer (CFRP) composite. The non-contact system consists of a pulsed laser (PL) for excitation and scanning laser Doppler vibrometer (SLDV) for sensing. The PL works in the thermoelastic regime to excite Lamb waves and SLDV provides high resolution multidimensional wavefield signals for evaluation. Two experimental setups are explored: excitation and sensing on the same side of the plate and each on opposing sides. Sensing parameters and surface enhancements are explored to obtain high frequency Lamb waves. The results show that the system can produce Lamb waves in higher frequency (<600 kHz) in plates thinner than 1 mm and are effective in thickness measurement.

Conference Presentation

Citation Download Citation

Elsa Z. Compton, Andrew P. Campbell, Pei-Kang Sun, and Lingyu Yu "Excitation and sensing of Lamb waves in very thin metals and nuclear cladding material using fully non-contact PL-SLDV system", Proc. SPIE 12048, Health Monitoring of Structural and Biological Systems XVI, 1204805 (19 April 2022); https://doi.org/10.1117/12.2612634

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