Three-Dimensional Electromechanical Impedance Model. II: Damage Analysis and PZT Characterization
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Volume 20, Issue 1
Abstract
Piezoceramic transducers (PZTs) are extensively used in the nondestructive evaluation of damages in various engineering structures. This paper, the second of a two-part paper, focuses on the application of a PZT using three-dimensional (3D) directional sum impedance (DSI). The semianalytical 3D admittance has been formulated and experimentally validated in the first paper. This part deals with the application of the 3D DSI model in damage analysis where by damages were numerically simulated for various types of specimens and the DSI admittance signatures were predicted and compared. The deviations of the signature from that of the undamaged state provide an indicator for the health of the structure. This technique is nondestructive in nature, and the damages were quantified using root-mean-square deviation in signatures with respect to the undamaged state signature. In Part I, the properties of the PZT and their influences on admittance signatures were briefly presented. In this part, a thorough investigation was made and the importance of all the PZT properties in damage analysis was presented.
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Published In
Journal of Aerospace Engineering
Volume 20 • Issue 1 • January 2007
Pages: 63 - 71
Copyright
© 2007 ASCE.
History
Received: Sep 7, 2005
Accepted: Jan 21, 2006
Published online: Jan 1, 2007
Published in print: Jan 2007
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