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Impedance-based health monitoring and mechanical testing of structures

  • Palomino, Lizeth Vargas (School of Mechanical Engineering, Federal University of Uberlandia, Campus Santa Monica) ;
  • de Moura, Jose Dos Reis Vieira Jr. (School of Mechanical Engineering, Federal University of Uberlandia, Campus Santa Monica) ;
  • Tsuruta, Karina Mayumi (School of Mechanical Engineering, Federal University of Uberlandia, Campus Santa Monica) ;
  • Rade, Domingos Alves (School of Mechanical Engineering, Federal University of Uberlandia, Campus Santa Monica) ;
  • Steffen, Valder Jr. (School of Mechanical Engineering, Federal University of Uberlandia, Campus Santa Monica)
  • Received : 2009.09.05
  • Accepted : 2010.08.10
  • Published : 2011.01.25
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Abstract

The mechanical properties obtained from mechanical tests, such as tensile, buckling, impact and fatigue tests, are largely applied to several materials and are used today for preliminary studies for the investigation of a desired element in a structure and prediction of its behavior in use. This contribution focus on two widely used different tests: tensile and fatigue tests. Small PZT (Lead Titanate Zirconate) patches are bonded on the surface of test samples for impedance-based health monitoring purposes. Together with these two tests, the electromechanical impedance technique was performed by using aluminum test samples similar to those used in the aeronautical industry. The results obtained both from tensile and fatigue tests were compared with the impedance signatures. Finally, statistical meta-models were built to investigate the possibility of determining the state of the structure from the impedance signatures.

Keywords

References

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