Innovative graphene-based sensors are produced\ud
through the spray deposition of multilayer graphene suspension\ud
in 1-propanol. They are cost effective and suitable for largescale\ud
integration in aeronautical-grade composite structures. The\ud
piezoresistive characteristic of the new sensor has been assessed\ud
through static, quasi-static, and dynamic tests. The obtained\ud
results show that the new sensors are suitable for detecting strains\ud
in any directions due to the isotropic piezoresistive characteristic\ud
of the graphene-based material. Moreover, the potentiality of the\ud
proposed sensors for the in situ non-destructive investigations\ud
of carbon-fiber-reinforced composite (CFRC) is assessed through\ud
the response analysis of an eight-sensor array deposited over\ud
a CFRC plate, and excited by a mechanical vibration with a\ud
spectral content up to 100 kHz
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