An Experimental and Numerical Study on the Use of Chirped FBG Sensors for Monitoring Fatigue Damage in Hybrid Composite Patch Repairs
| Autor: | Stephen L. Ogin, A.D. Crocombe, Rodolfo L. Rito |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Fabrication
Materials science fatigue delamination Composite number fibre reinforced plastic chemistry.chemical_element Fatigue damage 02 engineering and technology lcsh:Chemical technology Biochemistry chirped fibre bragg grating Article Analytical Chemistry 020210 optoelectronics & photonics Fiber Bragg grating Aluminium 0202 electrical engineering electronic engineering information engineering finite element analysis (FEA) lcsh:TP1-1185 Electrical and Electronic Engineering Composite material Instrumentation structural health monitoring Fibre-reinforced plastic 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics chemistry Adhesive Structural health monitoring 0210 nano-technology |
| Zdroj: | Sensors, Vol 21, Iss 1168, p 1168 (2021) Sensors Volume 21 Issue 4 Sensors (Basel, Switzerland) |
| ISSN: | 1424-8220 |
| Popis: | In this paper, chirped fibre Bragg grating (CFBG) sensors used to monitor the structural health of a composite patch used to repair an aluminium panel is presented. To introduce damage, a notch was produced at the centre of an aluminium panel. The repair consisted of bonding a pre-cured composite patch to the host panel using an aerospace-grade film adhesive the sensor was embedded in the bond-line during fabrication of the repair. The repaired panels were subjected to tension-tension loading in fatigue. Cracks initiated and grew from both ends of the notch in the aluminium panels and the fatigue loading was stopped periodically for short periods of time to record the reflected spectra from the sensor. It was found that perturbations in the reflected spectra began to occur when the crack was within about 2 to 3 mm of the sensor location after the crack passed the sensor location, the perturbations essentially stabilised. Predicted reflected spectra have been found to be in good agreement with the experiment, confirming that CFBG sensors can detect crack growth in patch-repaired panels. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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