Abstract
The detection and characterization of defects in adhesively bonded composite joints is of special interest for determining the load carrying capacity and structural integrity of resulting components for automobile, marine and aerospace applications. Embedded fiber Bragg-grating (FBG) sensors are being increasingly used to monitor the bonded region in adhesive joints as they do not affect the intrinsic bonding properties. This paper presents a highly reliable system that uses embedded FBG sensors for health monitoring in glass-fiber composite joints. Particularly, an array of strategically placed FBG sensors characterizes the extent and location of defects in the joints studied. Experimental data from the embedded FBGs can be further used to develop experimentally validated simulations (EVS) which can be used as a design tool and also to evaluate residual capacity of damaged joints. Preliminary results demonstrate potential of the developed technique for a wide variety of bonded joints with similar and dissimilar adherends.
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Acknowledgements
This work was supported by US Army under TACOM/MSU Cooperative Agreement No. W56HZV-07-2-0001 and under ARL/MSU Cooperative Agreement No. ARL CA #W911NF-11-2-0017. The authors also acknowledge the cross-disciplinary collaboration with Dr. Alfred Loos and Dr. Nicholas Gianaris of Composite Vehicle Research Center, Michigan State University.
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Haq, M., Khomenko, A., Udpa, L., Udpa, S. (2014). Fiber Bragg-Grating Sensor Array for Health Monitoring of Bonded Composite Lap-Joints. In: Tandon, G., Tekalur, S., Ralph, C., Sottos, N., Blaiszik, B. (eds) Experimental Mechanics of Composite, Hybrid, and Multifunctional Materials, Volume 6. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-00873-8_22
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DOI: https://doi.org/10.1007/978-3-319-00873-8_22
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