Structural Health Monitoring strategies within metal AM Parts: Feasibility Analysis on Space Structure

Speaker:
Lasagni, Fernando; CATEC - Advanced Center for Aerospace Technologies; Spain

Authors:
Fernándes, R.; CATEC - Advanced Center for Aerospace Technologies; Spain
Gutiérrez, N.; CATEC - Advanced Center for Aerospace Technologies; Spain
Lasagni, F.; CATEC - Advanced Center for Aerospace Technologies; Spain

ID: ECNDT-0505-2018
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Conventional manufacturing technologies for metal parts, like forging, machining, casting, among others, are limited in the generation of very complex geometries. For such manufacturing technologies, health monitoring strategies are basically limited to the introduction bonded sensors attached to the part surface. The development of Additive Manufacturing techniques favors the fabrication of complex designs, including channels, unfeasible to obtain by traditional methods, which enables the integration of embedded sensors at desired locations within the structure. Using this advantage, fiber optic sensors can be included, requiring the design of strategies for their integration. In this way, Bragg sensors are embedded and protected against possible damages that could cause their breakage.
In order to demonstrated the feasibility of this procedure, in this work, tests at coupon level have been carried out, where the optimal geometry of the channels has been determined as well as the fiber optic fixation procedure. Finally, the procedures have been validated on a space structure (connector support) from Vega launcher. The last has been previously topology optimized and sensorized with Fiber Bragg Grating sensors, and finally mechanically tested under compression tests.