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Experimenteller Aufbau zur Messung der Energiefreisetzungsrate für Risswachstum in PZT unter elektromechanischer Last
Citation Link: https://doi.org/10.15480/882.256
Other Titles
Experimental Set-up to Measure the Energy Release Rate for Crack Growth in PZT under Electromechanical Loading
Publikationstyp
Conference Paper
Date Issued
2005
Sprache
German
Author(s)
TORE-DOI
Citation
DVM-Bericht 237, 37. Tagung des DVM-Arbeitskreises Bruchvorgänge, S. 365
Four-point-bending V-notched specimens of PZT poled parallel to the long axis are fractured under conditions of controlled crack growth in a custom-made device. In addition to the mechanical loading an electric field is applied parallel or anti parallel to the poling direction. This is a typical loading condition for the application of piezo- and ferroelectric ceramics, respectively. To determine the different contributions to the total energy release rate the mechanical and piezoelectric compliance as well as the electrical capacitance of the sample are acquired continuously with a special technique as a function of the crack length. The derivation of the data with respect to the crack surface allows calculating all parts of the total energy release rate on the basis of a single bending experiment for the first time. The main focus here is the presentation of the experimental method.
Subjects
four point bending, crack growth, energy release rate, compliance
DDC Class
620:Engineering and allied operations
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DVM_2005_Jelitto_et_al.pdf
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