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Lifetime of laminar piezoceramic modules under cyclic tensile loading

Untersuchungen zur Lebensdauer flächiger piezokeramischer Sensor- und Aktormodule
: Gall, M.; Thielicke, B.

Neugebauer, R. ; Fraunhofer-Institut für Werkzeugmaschinen und Umformtechnik -IWU-, Chemnitz; TU Chemnitz, Institut für Werkzeugmaschinen und Produktionsprozesse:
4th Scientific Symposium "Lightweight Design by Integrating Functions" 2013. Proceedings : CRC/Transregio 39; 26.-27. März 2013, Nuremberg
Nuremberg, 2013
ISBN: 978-3-00-044670-2
Scientific Symposium "Lightweight Design by Integrating Functions" <4, 2013, Nuremberg>
Conference Paper
Fraunhofer IWM ()
piezoceramic transducer; lifetime analysis

Piezoceramic modules used for sensor or actuator applications in smart structures are typically subjected to alternating electro-mechanical loading. Primarily they have to withstand the operational conditions of the host structure, which can include large deformations. To ensure a reliable, reproducible module performance within an expected device lifetime, the loading limits and fatigue behavior of lead-zirconate-titanate (PZT) plate based modules are studied under tensile loading and a lifetime model based on micro-crack propagation was derived. Cracking of the piezoceramic plate is found to cause a degradation of the module performance. A shear lag based model is used to analyze the correlation between fragmentation and performance reduction, yielding good quantitative agreement to experimental data.