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Proceedings Paper

Fatigue disbonding analysis of wide composite panels by means of Lamb waves
Author(s): Lenka Michalcová; Lukáš Rechcígel; Petr Bělský; Pavel Kucharský
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Paper Abstract

Guided wave-based monitoring of composite structures plays an important role in the area of structural health monitoring (SHM) of aerospace structures. Adhesively bonded joints have not yet fulfilled current airworthiness requirements; hence, assemblies of carbon fibre-reinforced parts still require mechanical fasteners, and a verified SHM method with reliable disbonding/delamination detection and propagation assessment is needed. This study investigated the disbonding/delamination propagation in adhesively bonded panels using Lamb waves during fatigue tests. Analyses focused on the proper frequency and mode selection, sensor placement and selection of parameter sensitive to the growth of disbonding areas. Piezoelectric transducers placed across the bonded area were used as actuators and sensors. Lamb wave propagation was investigated considering the actual shape of the crack front and the mode of the crack propagation. The actual cracked area was determined by ultrasonic A-scans. A correlation between the crack propagation rate and the A0 mode velocity was found.

Paper Details

Date Published: 27 March 2018
PDF: 7 pages
Proc. SPIE 10599, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII, 105991E (27 March 2018); doi: 10.1117/12.2296851
Show Author Affiliations
Lenka Michalcová, VZLÚ, a.s. (Czech Republic)
Lukáš Rechcígel, VZLÚ, a.s. (Czech Republic)
Petr Bělský, VZLÚ, a.s. (Czech Republic)
Pavel Kucharský, VZLÚ, a.s. (Czech Republic)


Published in SPIE Proceedings Vol. 10599:
Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII
Peter J. Shull, Editor(s)

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