Westram, Ilona ; Ricoeur, Andreas ; Emrich, Andreas ; Rödel, Jürgen ; Kuna, Meinhard (2007)
Fatigue crack growth law for ferroelectrics under cyclic electrical and combined electromechanical loading.
In: Journal of the European Ceramic Society, 27 (6)
doi: 10.1016/j.jeurceramsoc.2006.09.010
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
New data sets of crack propagation in lead-zirconate-titanate DCB specimens under cyclic electric loading combined with a constant mechanical load have been obtained. Both an increasing mechanical load as well as an increasing field amplitude resulted in an enhanced crack propagation rate. The experiment was modelled with a Finite Element Analysis that used special crack tip elements and assumed a finite permeability of the crack. The calculations revealed a dielectric crack closure effect, explaining the experimentally observed threshold of fatigue crack growth for the electric load. Fracture quantities suitable for cyclic loading by electric fields above the coercive field were discussed and a Mode-IV intensity factor considered as appropriate. The resulting correlations were applied to the experimental results and a power law relationship for the crack growth rate versus the range of the Mode-IV intensity factor was found.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2007 |
| Autor(en): | Westram, Ilona ; Ricoeur, Andreas ; Emrich, Andreas ; Rödel, Jürgen ; Kuna, Meinhard |
| Art des Eintrags: | Bibliographie |
| Titel: | Fatigue crack growth law for ferroelectrics under cyclic electrical and combined electromechanical loading |
| Sprache: | Englisch |
| Publikationsjahr: | 2007 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 27 |
| (Heft-)Nummer: | 6 |
| DOI: | 10.1016/j.jeurceramsoc.2006.09.010 |
| Kurzbeschreibung (Abstract): | New data sets of crack propagation in lead-zirconate-titanate DCB specimens under cyclic electric loading combined with a constant mechanical load have been obtained. Both an increasing mechanical load as well as an increasing field amplitude resulted in an enhanced crack propagation rate. The experiment was modelled with a Finite Element Analysis that used special crack tip elements and assumed a finite permeability of the crack. The calculations revealed a dielectric crack closure effect, explaining the experimentally observed threshold of fatigue crack growth for the electric load. Fracture quantities suitable for cyclic loading by electric fields above the coercive field were discussed and a Mode-IV intensity factor considered as appropriate. The resulting correlations were applied to the experimental results and a power law relationship for the crack growth rate versus the range of the Mode-IV intensity factor was found. |
| Freie Schlagworte: | Cracking; PZT; Mechanical properties; Piezoelectric properties; Fatigue |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe |
| Hinterlegungsdatum: | 18 Mai 2011 15:19 |
| Letzte Änderung: | 14 Aug 2020 09:55 |
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