Smart Structures and Systems

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Experimental assessment of the piezoelectric transverse d15 shear sensing mechanism

  • Berik, Pelin (Institute for Technical Mechanics, Johannes Kepler University) ;
  • Benjeddou, Ayech (Structures, Institut Superieur de Mecanique de Paris) ;
  • Krommer, Michael (Institute for Technical Mechanics, Johannes Kepler University)
  • Received : 2013.11.08
  • Accepted : 2014.01.24
  • Published : 2014.04.25
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Abstract

The piezoelectric transverse $d_{15}$ shear sensing mechanism is firstly assessed experimentally for a cantilever smart sandwich plate made of a piezoceramic axially poled patched core and glass fiber reinforced polymer composite faces. Different electrical connections are tested for the assessment of the sensor performance under a varying amplitude harmonic (at 24 Hz) force. Also, the dynamic response of the smart sandwich composite structure is monitored using different acquisition devices. The obtained experimentally sensed voltages are compared to those resulting from the benchmark three-dimensional piezoelectric coupled finite element simulations using a commercial code where realistic features, like equipotential conditions on the patches' electrodes and mechanical updating of the clamp, are considered. Numerically, it is found that the stiffness of the clamp, which is much softer than the ideal one, has an enormous influence on the sensed voltage of its adjacent patch; therefore, sensing with the patch on the free side would be more advantageous for a cantilever configuration. Apart from confirming the latter result, the plate benchmark experimental assessment showed that the parallel connection of its two oppositely poled patches has a moderate performance but better than the clamp side patch acting as an individual sensor.

Keywords

References

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