Fatigue disbonding analysis of wide composite panels by means of Lamb waves

Lenka Michalcová; Lukáš Rechcígel; Petr Bělský; Pavel Kucharský

doi:10.1117/12.2296851

27 March 2018 Fatigue disbonding analysis of wide composite panels by means of Lamb waves

Lenka Michalcová, Lukáš Rechcígel, Petr Bělský, Pavel Kucharský

Proceedings Volume 10599, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII; 105991E (2018) https://doi.org/10.1117/12.2296851
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2018, Denver, Colorado, United States

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.

Conference Presentation

Citation Download Citation

Lenka Michalcová, Lukáš Rechcígel, Petr Bělský, and Pavel Kucharský "Fatigue disbonding analysis of wide composite panels by means of Lamb waves", Proc. SPIE 10599, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII, 105991E (27 March 2018); https://doi.org/10.1117/12.2296851

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