Abstract
A case study is presented in which the first steps are made towards the development of a structural health monitoring (SHM) data fusion framework. For this purpose, a composite single-stiffener panel is subjected to compression-compression fatigue loading (R = 10). The carbon-epoxy panel contains an artificial disbond of 30 mm, which was created using a Teflon insert during manufacturing and placed between the skin and the stiffener foot. Under the applied fatigue load, the disbond is expected to grow and its propagation is monitored using two SHM techniques, namely acoustic emission (AE) and Rayleigh-scattering based distributed fiber optic strain sensing. Four AE sensors are placed on the skin, thereby allowing for disbond growth detection and localization. On each stiffener foot, fiber optic sensors are surface-bonded to monitor the growth of the disbond under the applied fatigue loading. The distributed strain measurements are used to localize and monitor the disbond growth. The strength of each technique is utilized by fusing the data from the AE sensors and the fiber optic sensors. In this manner, a data-driven approach is presented in which a data fusion of the different techniques allows for monitoring the damage in the stiffened panel on multiple SHM levels, including disbond growth detection and localization.
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Notes
- 1.
ReMAP: Real-time Condition-based Maintenance for Adaptive Aircraft Maintenance Planning. https://h2020-remap.eu/.
- 2.
The test was interrupted at 30,000, 50,000, 70,000, 100,000, and 245,000 for limited time periods.
- 3.
The load level was changed to −0.2 kN after 50,000 cycles.
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Acknowledgements
We would like to acknowledge Embraer for the design of the SSCs, Optimal Structural Solutions for the manufacturing of the SSCs, Smartec for the SMARTapes procurement, Cedrat Technologies for the LW sensing equipment, École Nationale Supérieure d’Arts et Métiers for the LW data acquisition software, and our colleagues at the labs of TU Delft and University of Patras for their technical support. This work was financially supported by the European Union’s Horizon 2020 research and innovation program under grant agreement No. 769288.
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Broer, A.A.R., Galanopoulos, G., Zarouchas, D., Loutas, T., Benedictus, R. (2021). Damage Diagnostics of a Composite Single-Stiffener Panel Under Fatigue Loading Utilizing SHM Data Fusion. In: Rizzo, P., Milazzo, A. (eds) European Workshop on Structural Health Monitoring. EWSHM 2020. Lecture Notes in Civil Engineering, vol 127. Springer, Cham. https://doi.org/10.1007/978-3-030-64594-6_60
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