Smart Structures and Systems

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Damage detection in beam-type structures via PZT's dual piezoelectric responses

  • Nguyen, Khac-Duy (Department of Ocean Engineering, Pukyong National University) ;
  • Ho, Duc-Duy (Faculty of Civil Engineering, Ho Chi Minh City University of Technology) ;
  • Kim, Jeong-Tae (Department of Ocean Engineering, Pukyong National University)
  • Received : 2011.11.09
  • Accepted : 2012.12.01
  • Published : 2013.02.25
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Abstract

In this paper, practical methods to utilize PZT's dual piezoelectric effects (i.e., dynamic strain and electro-mechanical (E/M) impedance responses) for damage detection in beam-type structures are presented. In order to achieve the objective, the following approaches are implemented. Firstly, PZT material's dual piezoelectric characteristics on dynamic strain and E/M impedance are investigated. Secondly, global vibration-based and local impedance-based methods to detect the occurrence and the location of damage are presented. Finally, the vibration-based and impedance-based damage detection methods using the dual piezoelectric responses are evaluated from experiments on a lab-scaled beam for several damage scenarios. Damage detection results from using PZT sensor are compared with those obtained from using accelerometer and electric strain gauge.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

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