Abstract
Surface bonded piezoelectric ceramic (PZT) transducers are currently the most prominentarea of research in structural health monitoring using electromechanical impedancemethods. This paper presents a new embedded PZT patch and its interaction with thehost sandwiched beam. Durability and protection from surface finish, vandalismand the environment are important features of the embedment. The paper alsodemonstrates the use of thickness vibration of the PZT patch in electromechanicaladmittance formulations. This embedded PZT–structure interaction model is basedon the new concept of ‘average sum impedance’. The formulations used for thismodel can be conveniently employed to extract the mechanical impedance of any‘unknown’ PZT patch embeddable plane structure. The mechanical impedanceof the structure is obtained from the admittance signatures of the embeddedPZT patch. The proposed model is experimentally verified on sandwiched beams.
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