Impedance-based health monitoring and mechanical testing of structures

Resumo

The mechanical properties obtained from the strength tests like tensile, buckling, impact and fatigue tests are largely applied to several materials and are used today for previous studies for investigation of a desired element in a structure and its behavior in use. This contribution focus on two different tests: tensile and fatigue tests. Small PZT (Lead Titanate Zirconate) patches are bonded on the surface of the coupons for the impedance-based health monitoring purposes. Together with these two tests, the electromechanical impedance technique was performed by using Aluminium coupons similar to those used n the aeronautical industry. The results obtained both from tensile and fatigue testes were compared with the impedance signatures. Finally, statistical meta-models were built aiming at investigating the possibility of determining the state of the structure from the impedance signatures. © 2009 Society for Experimental Mechanics Inc.

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