Structural Health Monitoring (SHM) Study of Polymer Matrix Composite (PMC) Materials Using Nonlinear Vibration Methods Based on Embedded Piezoelectric Transducers

Nowadays, nonlinear vibration methods are increasingly used for the detection of damage mechanisms in polymer matrix composite (PMC) materials, which are anisotropic and heterogeneous. The originality of this study was the use of two nonlinear vibration methods to detect different types of damage within PMC through an in situ embedded polyvinylidene fluoride (PVDF) piezoelectric sensor. The two used methods are nonlinear resonance (NLR) and single frequency excitation (SFE). They were first tested on damage introduced during the manufacturing of the smart PMC plates, and second, on the damage that occurred after the manufacturing. The results show that both techniques are interesting, and probably a combination of them will be the best choice for SHM purposes. During the experimentation, an accelerometer was used, in order to validate the effectiveness of the integrated PVDF sensor.

Automated summary

Nowadays, nonlinear vibration methods are increasingly used for detecting damage mechanisms in anisotropic and heterogeneous polymer matrix composite (PMC) materials. This study employed two nonlinear vibration methods, nonlinear resonance (NLR) and single frequency excitation (SFE), to detect different types of damage in PMC using an in situ embedded polyvinylidene fluoride (PVDF) piezoelectric sensor. The effectiveness of the integrated PVDF sensor was validated using an accelerometer.