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Smart Structures and Systems Volume 13, Number 4, April 2014 , pages 567-585 DOI: https://doi.org/10.12989/sss.2014.13.4.567 |
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Experimental assessment of the piezoelectric transverse d15 shear sensing mechanism |
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Pelin Berik, Ayech Benjeddou and Michael Krommer
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| Abstract | ||
| The piezoelectric transverse d15 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. | ||
| Key Words | ||
| piezoceramic d15 shear sensing; piezoelectric composite sandwich plate; harmonic sensing experiments; finite element simulations; mechanical updating; electrical connections | ||
| Address | ||
| Pelin Berik and Michael Krommer:Institute for Technical Mechanics, Johannes Kepler University, 4040 Linz, Austria Ayech Benjeddou:Structures, Institut Supérieur de Mécanique de Paris, 93400 Saint Ouen, France | ||