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Guided wave scattering analysis around a circular delamination in a quasi-isotropic fiber-composite laminate

Maio, L; Hervin, F; Fromme, P; (2020) Guided wave scattering analysis around a circular delamination in a quasi-isotropic fiber-composite laminate. In: Proceedings Volume 11381, Health Monitoring of Structural and Biological Systems XIV. (pp. 113810Q). SPIE: Online Only. Green open access

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Abstract

Carbon fiber reinforced composites are widely used in the aerospace industry, but barely visible impact damage can lead to delamination and compromise the structural integrity. The scattering of the fundamental anti-symmetric guided wave mode (A0 Lamb mode) at an artificial circular delamination in a quasi-isotropic laminate was investigated experimentally. A 5 cycle Hanning windowed wave pulse was used as the excitation signal for the experiments. Fast Fourier Transform was employed to identify the guided wave amplitude of the scattered field along various directions. The experimental wavefield was captured using a laser Doppler vibrometer. Experimental results are presented for the scattering pattern and scattering amplitude as a function of distance from the damage. The results of this study can help to improve delamination detection techniques using guided waves and to gain physical insights into the scattering of guided waves at a delamination.

Type: Proceedings paper
Title: Guided wave scattering analysis around a circular delamination in a quasi-isotropic fiber-composite laminate
Event: SPIE Smart Structures + Nondestructive Evaluation
ISBN-13: 9781510635395
Open access status: An open access version is available from UCL Discovery
DOI: 10.1117/12.2559125
Publisher version: http://dx.doi.org/10.1117/12.2559125
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Composite material, Laminate, Lamb waves, Scattering, Delamination.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10104301
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