Fiber-optically sensorized composite wing

Incorporation of fiber Bragg grating sensors in additive manufactured Acrylonitrile butadiene styrene for strain monitoring during fatigue loading

“…Costa et al performed static and dynamic tests on a quarter scale model of a T38 composite wing with embedded FBG sensors [18]. A finite element model of the wing was used to position the sensors in the areas with the highest strain values while maintaining a low rate of change of strain with distance.…”

Fibre Optic Sensors for Structural Health Monitoring of Aircraft Composite Structures: Recent Advances and Applications

“…In [ 52 ] Mendoza et al describe a lightweight, high-speed and self-powered fibre optic sensor system based on the use of monolithic photonic integrated circuit (PIC) microchip technology in order to integrate and miniaturise the optical and optoelectronic components; reportedly the system is capable of measuring static and dynamic data over a range of ±4000 µε, at sampling frequencies of up to 500 kHz, therefore being suitable for the real time detection of operating load, fatigue and damages. Costa et al [ 53 ] have developed a parallel processing interrogator that allows massive multiplexing of a high number of FBG sensors sampled at high rates. Groups of up to 16 sensors can be sampled simultaneously up to 1 MHz on a single fibre with the capability of switching between multiple fibres in the kHz range.…”

“…More recently, as already mentioned in the section on FBG interrogation systems, Costa et al [ 53 ] reported on a newly developed parallel processing interrogator that allows massive multiplexing of FBG sensors sampled at high rates, capturing loading and relatively low frequency vibration phenomena; the T38 wing quarter scale model shown in Figure 12 was sensorised and results obtained for sampling of four sensors at 6 kHz. The FBG sensors were embedded under the top layer of the composite model wing, in positions selected based on the results of an FE analysis.…”

Morphing aircraft based on smart materials and structures: A state-of-the-art review

“…The strain distribution can be obtained accurately by temperature compensation (Kim et al, 2013). Embedded FBG sensors have been used in composite wings to monitor impact damage (Nakamura et al, 2007; Takeda et al, 2007), cracks (Sekine et al, 2006), and loads (Costa et al, 2014). These sensors can identify the locations and the shapes of fatigue cracks and the time of failure.…”