Smart Intelligent Aircraft Structures (SARISTU) pp 725-733 | Cite as
Brittle Coating Layers for Impact Detection in CFRP
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Abstract
The detection of possible impacts in carbon-fiber-reinforced plastic (CFRP) structures is important for the evaluation of structural integrity of CFRP. Sol–gel-based sensitive coatings for impact detection on CFRP substrates have been developed and investigated by University of Aveiro (UAVR). The coatings are based on hybrid sol–gel formulations with tunable mechanical properties, i.e., brittleness adjusted for a defined range of impact energy. This sensitive layer allows the identification and location of mechanical impacts under visible light and without supplementary tools or conditions for its detection. A systematic study was performed to enhance the coating response for the defined impact threshold. A set of different parameters such as composition, fillers, curing conditions, surface roughness, and chemistry of the surface were tested and optimized.
Keywords
Structural Health Monitoring Mechanical Impact Impact Damage Inorganic Filler Brittle CoatingNomenclature
- SHM
Structural health monitoring
- NDT
Non destructive testing
- CFRP
Carbon-fiber-reinforced plastic
- Sg
Sol–gel
- BC
Bar coater
- UAVR
University of Aveiro
Notes
Acknowledgments
The research leading to these results has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement no 284562.
FM, KY, and JT thank FCT for PhD SFRH/BD/72663/2010, Post-Doctoral SFRH/BPD/80754/2011 and IF/00347/2013 grants, respectively.
References
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