Abstract
This paper shows a piezoelectric response from an innovative sensor obtained by casting epoxy-SbSI (antimony sulfoiodide) nanowires nanocomposite to a grid structure printed using a fuse deposition modeling (FDM) method. The grid is shown to be a support structure for the nanocomposite. The applied design approach prospectively enables the formation of sensors with a wide spectrum of shapes and a wide applicability. The voltage signal obtained as a result of the piezoelectric effect reached 1.5V and 0.5V under a maximum static stress of 8.5 MPa and under a maximum dynamic stress of 22.3 kPa, respectively. These values are sufficient for potential application in sensor systems. The effect of a systematic increase in the voltage signal with subsequent cycles was also observed, which similarly allows the use of these sensors in monitoring systems for structures exposed to unfavorable cyclical loads. The obtained results also show that the piezoelectric signal improves with increase in strain rate.
Highlights
Strain sensors are used to monitor the behavior of a variety of advanced structures, including load-bearing elements in aviation [1]
Assuming a good connection between the matrix and the nanowires, we propose that the nanowires act as reinforcing elements of the composite structure and will create greater mechanical resistance against the external action, which by a specific mechanism transfers into the intensity of the generation of electric charges and the value of the generated voltage
Assuming aofgood connection between the matrix and the nanowires, we propose that the rate; of destruction of a sample deformed at a higher speed, B—energy of destruction integrated in the laminate structure
Summary
Strain sensors are used to monitor the behavior of a variety of advanced structures, including load-bearing elements in aviation [1]. They form systems which together are used for structural health monitoring (SHM). The most commonly used solutions are vibrating wire [2], optical [3], piezoresistive [4] or piezoelectric sensors [5] mounted to the construction or embedded into the material’s structure. Systems based on vibration and noise analysis are used [6,7]. Monitoring systems are used, for example, for the analysis of molding processes [10,11]. Inserting sensors into the material structure disrupts its local continuity, weakening the structure at the place of insertion [12]
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