A new method of structural stress monitoring based on piezoelectric (PZT) impedance frequency shift is proposed in this paper. Since the sensitive frequency of the imaginary part of admittance signature discussed in this paper reaches several megahertz and no specified signature frequency in such a high range is given, several groups of experiments and a theoretical analysis are conducted. In the experiments, the PZT patches are bonded on the aluminum plate and the aluminum rod for the tensile and compressive experiments, respectively. The experimental results show that in such a high-sweep frequency band (MHz), when the host structure is subjected to a tensile stress, the resonances in the admittance spectrum of PZT increases linearly, and the tensile force also increases. While the host structure is subjected to a compressive load, the resonances decrease linearly as the compressive force increases. Theoretical analysis shows that while the tensile force increases the stiffness of both the host structure and the PZT material, and the compressive force decreases it, the stiffness changes cause the resonance shift in the PZT admittance spectrum. The method based on the PZT impedance frequency shift can monitor the health of the stressed structure, and it has a promising application in engineering fields.


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    Titel :

    Structural Stress Monitoring Based on Piezoelectric Impedance Frequency Shift


    Beteiligte:
    Wang, Tao (Autor:in) / Wei, Denglai (Autor:in) / Shao, Junhua (Autor:in) / Li, Yourong (Autor:in) / Song, Gangbing (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2018-07-24




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Unbekannt