|Publisher DOI:||10.1016/j.compstruct.2023.116696||Title:||Health monitoring of CFRP laminates under cyclic loading via vibro-acoustic modulation based measurements||Language:||English||Authors:||Willmann, Erik
|Keywords:||Carbon fibre; Composite laminates; Damage progression; Health monitoring; Non-destructive testing; SHM; Thin-ply; Vibro-acoustic modulation||Issue Date:||18-Jan-2023||Publisher:||Elsevier||Source:||Composite Structures 308: 116696 (2023-03-15)||Abstract (english):||
Estimating the damage state of composites is essential since carbon fibre reinforced polymers (CFRP) have a complex damage and propagation behaviour. Accordingly, a comprehensive study of the effects of matrix cracks – e.g. their size and crack density – and the influence of different damage types and their interaction on the vibro-acoustic modulation (VAM) behaviour of CFRP specimens under fatigue loading was carried out. These effects were evaluated in two sets of commonly employed laminate layups. Firstly, in a cross-ply (CP) layup, the number of 90°layers was varied, with a constant areal weight (268 g/m2). Secondly, quasi-isotropic (QI) specimens were tested, where the areal weight was reduced from thick-ply to thin-ply (30–268 g/m2), changing the failure mode from a delamination-dominated to a brittle failure. After damage introduction under tension–tension loading (R=0.1), high-frequency Lamb waves are introduced via piezoceramic actuators and modulated by a low-frequency vibration using a servo-hydraulic testing machine. VAM correlates with the different damage behaviour and damage conditions in CFRP. For this purpose, the evolution of the sideband amplitudes, the modulation index, the signal in time domain and X-ray scans are used. Regardless of the layup, the degree of stiffness-reducing inter-fibre fractures and large-scale delaminations can be detected.
|URI:||http://hdl.handle.net/11420/14779||ISSN:||0263-8223||Journal:||Composite structures||Institute:||Kunststoffe und Verbundwerkstoffe M-11
Molekulardynamische Simulation weicher Materie M-EXK2
|Appears in Collections:||Publications without fulltext|
Show full item record
checked on Apr 28, 2023
Add Files to Item
Note about this record
Cite this record
Items in TORE are protected by copyright, with all rights reserved, unless otherwise indicated.