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- Title
Inverse piezoelectric material parameter characterization using a single disc-shaped specimen.
- Authors
Feldmann, Nadine; Schulze, Veronika; Claes, Leander; Jurgelucks, Benjamin; Walther, Andrea; Henning, Bernd
- Abstract
The increasingly simulation-driven design process of ultrasonic transducers requires several reliable parameters for the description of the material behaviour. Exact results can only be achieved when a single specimen is used in the identification process, which typically is prone to the problem of low sensitivities to certain material parameters and thus high uncertainties. Therefore, a custom electrode topology for increased sensitivity is proposed for a piezoceramic disc. The thereupon conducted measurements of the electric impedance can be used as a starting point for an inverse approach where an equivalent simulation model is used to identify fitting material parameters. An optimisation strategy based on a preliminary sensitivity analysis is presented that leads to a good agreement between measurement and simulation. Furthermore, the proposed measurement procedure is able to evaluate the quality of the simulation model. Hence, different frequency-dependent damping models are presented and evaluated.
- Subjects
PIEZOELECTRIC materials; ELECTRIC impedance measurement; ULTRASONIC transducers; PIEZOELECTRIC thin films
- Publication
Technisches Messen, 2020, Vol 87, ps50
- ISSN
0171-8096
- Publication type
Article
- DOI
10.1515/teme-2020-0012