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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ghodsi, Mojtaba
University of Portsmouth
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2020Effect of damping on performance of magnetostrictive vibration energy harvester
- 2019Temperature effects on electromechanical response of deposited piezoelectric sensors used in structural health monitoring of aerospace structurescitations
- 2019Dynamic analysis and performance optimization of permendur cantilevered energy harvester
- 2017Experimental Study on the Effect of Point Angle on Force and Temperature in Ultrasonically Assisted Bone Drillingcitations
- 2016Effect of magnetic field on mechanical properties in Permendurcitations
- 2016Electrical properties of UV-irradiated thick film piezo-sensors on superalloy IN718 using photochemical metal organic depositioncitations
- 2015Thickness and thermal processing contribution on piezoelectric characteristics of Pb(Zr-Ti)O3 thick films deposited on curved IN738 using sol–gel techniquecitations
- 2011Effect of forging on ferromagnetic properties of low-carbon steelcitations
- 2006The characteristics of trapped magnetic flux inside bulk HTS in the Mixed-mu levitation systemcitations
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article
Temperature effects on electromechanical response of deposited piezoelectric sensors used in structural health monitoring of aerospace structures
Abstract
Turbomachine components used in aerospace and power plant applications preferably require continuous structural health monitoring at various temperatures. The structural health of pristine and damaged superalloy compressor blades of a gas turbine engine was monitored using real electro-mechanical impedance of deposited thick film piezoelectric transducers at 20 and 200 C. IVIUM impedance analyzer was implemented in laboratory conditions for damage detection in superalloy blades, while a custom-architected frequency-domain transceiver circuit was used for semi-field circumstances. Recorded electromechanical impedance signals at 20 and 200 C acquired from two piezoelectric wafer active sensors bonded to an aluminum plate, near and far from the damage, were initially utilized for accuracy and reliability verification of the transceiver at temperatures >20 C. Damage formation in both the aluminum plate and blades showed a peak shift in the swept frequency along with an increase in the amplitude and number of impedance peaks. The thermal energy at 200 C, on the other hand, enforces a further subsequent peak shift in the impedance signal to pristine and damaged parts such that the anti-resonance frequency keeps reducing as the temperature increases. The results obtained from the impedance signals of both piezoelectric wafers and piezo-films, revealed that increasing the temperature somewhat decreased the real impedance amplitude and the number of anti-resonance peaks, which is due to an increase in permittivity and capacitance of piezo-sensors. A trend is also presented for artificial intelligence training purposes to distinguish the effect of the temperature versus damage formation in sample turbine compressor blades. Implementation of such a monitoring system provides a distinct advantage to enhance the safety and functionality of critical aerospace components working at high temperatures subjected to crack, wear, hot-corrosion and erosion.