Recent advances in structural integrity evaluation have led to the development of PZT wafer sensors (PWAS) which can be embedded or surface mounted for both acoustic emission (AE) and ultrasonic (UT) modes, which forms an integrated approach for Structural Health Monitoring (SHM) of aerospace structures. For the fabrication of PWAS wafers, soft PZT formulation (SP-5H Grade containing dopants like BA, SM, CA, ZN, Y and HF) were used. The piezoelectric charge constant (d33) was measured by a d33 meter. As a first step towards the final objective of developing Health monitoring methods with embedded PWAS, experiments were conducted on aluminum and composite plates of finite dimensions using PWAS sensors. The AE source was simulated by breaking 0.5 mm pencil lead on the surface of a thin plate. Experiments were also conducted with surface mounted PZT films and conventional AE sensors in order to establish the sensitivity of PWAS. A comparison of results of theoretical and experimental work shows good agreement.


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    Title :

    Embedded PZT wafer sensors for structural health monitoring


    Additional title:

    Eingebettete PZT-Wafersensoren zur strukturellen Zustandsüberwachung


    Contributors:


    Publication date :

    2007


    Size :

    8 Seiten, 10 Bilder, 8 Quellen





    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English