MATEC Web Conf.
Volume 254, 2019XXIII Polish-Slovak Scientific Conference on Machine Modelling and Simulations (MMS 2018)
|Number of page(s)||7|
|Section||Experimental Mechanics, Identification and Validation|
|Published online||15 January 2019|
Detection of composite damage by IR NDT using ultrasonic and optic excitation
University of Zilina, Faculty of Mechanical Engineering, Department of Applied Mechanics, Univerzitná 1, 01026 Zilina, Slovak Republic
2 University J. E. Purkyne in Usti nad Labem, Faculty of Mechanical Engineering, Institute of Machinery and Energetics, Na Okraji 1001, 400 96 Ústí nad Labem, Czech Republic
* Corresponding author: firstname.lastname@example.org
The submitted paper presents experience with detection of damaged composites by means of an ultrasonic excitation system in comparison with an optic system of excitation. In case of the ultrasonic excitation system is a high-frequency signal modulated by lock-in frequency. For a selection of the carrier signal we measured a response of a sample to sweep excitation and a sample resonance was defined by means of STFT. Consequently, the method lock-in was applied for detection. In case of the optic excitation system we applied several suitably selected frequencies with an aim to obtain information from various depths of the measured object. Results of measurements are presented in composite samples of CFRP.
Key words: Composite / infrared / thermography / NDT / lock-in / UTvis / OTvis
© The Authors, published by EDP Sciences, 2019
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