Title :
Fatigue behaviour of multilayer piezoelectric actuators
Author :
Zickgraf, B. ; Schneider, G.A. ; Aldinger, F.
Author_Institution :
Pulvermetall. Lab., Max-Planck-Inst. fur Metallforschung, Stuttgart, Germany
Abstract :
Fatigue experiments of multilayer PZT actuators are presented, carried out under various electrical and mechanical loading conditions. Impedance measurements of cycled actuators are made to determine nondestructively their actual state of degradation. Some fracture surface examinations are described and occurring crack patterns are shown. For a detailed investigation of crack initiation and crack growth at electrode tips and interface layer model experiments with 2-layer samples are performed with in situ crack growth observations. Different crack types are found and possible crack growth mechanisms are suggested
Keywords :
electric impedance; fatigue; fatigue cracks; fracture; lead compounds; nondestructive testing; piezoceramics; piezoelectric actuators; 2-layer samples; PZT; PbZrO3TiO3; crack growth; crack initiation; crack patterns; crack types; cycled actuators; degradation; electrical loading; electrode tips; fatigue behaviour; fracture surface examination; impedance measurements; in situ crack growth observations; interface layer model; mechanical loading conditions; multilayer PZT actuators; multilayer piezoelectric actuators; nondestructive measurements; Clamps; Degradation; Electrodes; Fatigue; Force sensors; Geometry; Impedance measurement; Nonhomogeneous media; Piezoelectric actuators; Testing;
Conference_Titel :
Applications of Ferroelectrics, 1994.ISAF '94., Proceedings of the Ninth IEEE International Symposium on
Conference_Location :
University Park, PA
Print_ISBN :
0-7803-1847-1
DOI :
10.1109/ISAF.1994.522368
