Effects of adhesive on the electromechanical response of a piezoceramic-transducer-coupled smart system

C. W. Ong; Yaowen Yang; Y. T. Wong; Suresh Bhalla; Yong Lu; Chee Kiong Soh

doi:10.1117/12.514757

14 October 2003 Effects of adhesive on the electromechanical response of a piezoceramic-transducer-coupled smart system

C. W. Ong, Yaowen Yang, Y. T. Wong, Suresh Bhalla, Yong Lu, Chee Kiong Soh

Proceedings Volume 5062, Smart Materials, Structures, and Systems; (2003) https://doi.org/10.1117/12.514757
Event: Smart Materials, Structures, and Systems, 2002, Bangalore, India

Abstract

The electro-mechanical (EM) impedance method is gradually emerging as a widely accepted technique for structural health monitoring and systems identification. The method utilizes smart piezoceramic (PZT) transducers intimately bonded to the surface of a structural substrate. Through the unique electro-mechanical properties of the PZT transducers, the presence of damage, as well as the dynamical properties of the host structure are captured and reflected in the electrical admittance response. In the present work, the effect of the bond layer on the electro-mechanical response of a smart system is being studied. Experiments with the EM impedance method were performed on laboratory-sized beams. Consequently, the effects of shear lag due to the finite thickness bond layer were successfully identified. This was followed by the theoretical analysis of shear lag effects. It was found that the induced strain behavior of the structural specimen in question is inevitably modified by the presence of shear lag between the PZT transducer and the structural substrate. Subsequently, the EM admittance response of the beam specimens were simulated based on the results gathered from the theoretical analysis. Incidentally, it was found that the theoretical model clearly depicts the trends of the measured response.

Citation Download Citation

C. W. Ong, Yaowen Yang, Y. T. Wong, Suresh Bhalla, Yong Lu, and Chee Kiong Soh "Effects of adhesive on the electromechanical response of a piezoceramic-transducer-coupled smart system", Proc. SPIE 5062, Smart Materials, Structures, and Systems, (14 October 2003); https://doi.org/10.1117/12.514757

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