Damage assessment in composite panel based on non-contact elastic wave excitation and sensing

Tomasz Wandowski; Damian Mindykowski; Maciej Radzienski; Pawel Kudela; Piotr Fiborek

doi:10.1117/12.2612483

19 April 2022 Damage assessment in composite panel based on non-contact elastic wave excitation and sensing

Tomasz Wandowski, Damian Mindykowski, Maciej Radzienski, Pawel Kudela, Piotr Fiborek

Proceedings Volume 12048, Health Monitoring of Structural and Biological Systems XVI; 120480F (2022) https://doi.org/10.1117/12.2612483
Event: SPIE Smart Structures + Nondestructive Evaluation, 2022, Long Beach, California, United States

Abstract

In this paper results of damage assessment of composite panels using guided wave propagation phenomenon are presented. Elastic waves excitation is based on an air-coupled transducer (ACT) while the waves sensing is based on scanning laser Doppler vibrometry. It thus forms the full non-contact diagnostic approach. Thin panels made of fibre-reinforced polymer are investigated. The problem of optimal slope angle of ACT and the possibility of symmetric and antisymmetric elastic wave modes excitation is investigated. Research is related to the detection and localisation of artificial damage (additional mass, Teflon inserts). Moreover, the influence of single and multiple acoustic wave sources on artificial damage localization results and the problem of panel coverage area by elastic waves with large amplitudes to improve damage sensitivity are investigated. Different locations of ACTs and their influence on damage detection results are investigated. Two damage imaging algorithms based on elastic waves have been proposed, namely root mean square (RMS) energy maps and wavefield irregularity mapping (WIM). Moreover, results of simulations of elastic wave generation using ACT in CFRP plate based on a combination of FEM method and spectral element method (SEM) are presented. For this purpose COMSOL software and in-house MATLAB code are utilized, respectively

Conference Presentation

Citation Download Citation

Tomasz Wandowski, Damian Mindykowski, Maciej Radzienski, Pawel Kudela, and Piotr Fiborek "Damage assessment in composite panel based on non-contact elastic wave excitation and sensing", Proc. SPIE 12048, Health Monitoring of Structural and Biological Systems XVI, 120480F (19 April 2022); https://doi.org/10.1117/12.2612483

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