Abstract
An embedded sensor network technique was developed for improving the overall integrity of functionalized composite structures engaged in aircraft. Aset of miniaturized piezoelectric wafers was designed and circuited to configure a built-in active actuator/sensor network, which was immobilized into multi-layered composite laminates. The propagation characteristics of Lamb waves generated and collected by this built-in sensor network in carbon fibre-reinforced composite laminates were investigated. The influence of a stiffener and of the excitation frequency on the propagation of the Lamb waves generated was evaluated. A study was carried out to assess delamination in CF/EP (carbon fibre/epoxy) woven laminates, by fusing information from multiple sensing paths of the embedded network on the basis of the Hilbert transform, signal correlation and probabilistic searching. An excellent identification capability indicates the considerable application potential of the proposed sensor network approach in providing high-fidelity data acquisition and condition monitoring for composite aircraft structures.
| Original language | English |
|---|---|
| Article number | 050 |
| Pages (from-to) | 1939-1949 |
| Number of pages | 11 |
| Journal | Smart Materials and Structures |
| Volume | 15 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1 Dec 2006 |
| Externally published | Yes |
ASJC Scopus subject areas
- Signal Processing
- Atomic and Molecular Physics, and Optics
- Civil and Structural Engineering
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Electrical and Electronic Engineering