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Dynamic Observation of Crack Propagation in Piezoelectric Multilayer Actuators
Author(s) -
Furuta Atsushi,
Uchino Kenji
Publication year - 1993
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1993.tb03950.x
Subject(s) - electric field , materials science , piezoelectricity , electrode , displacement (psychology) , actuator , composite material , enhanced data rates for gsm evolution , field (mathematics) , crack tip opening displacement , fracture mechanics , crack closure , electrical engineering , chemistry , physics , computer science , telecommunications , psychology , mathematics , quantum mechanics , pure mathematics , psychotherapist , engineering
Crack propagation in multilayer piezoelectric actuators made of Pb((Ni 1/3 Nb 2/3 ), Ti, Zr)O 3 ceramics with an interdigital electrode configuration was observed dynamically under an applied cyclic electric field using charge coupled device microscopy. The crack was observed only under a high electric field, and it healed under zero field. The crack was initiated at the internal electrode edge and propagated from the electrode edge in three directions. The electric‐field‐induced displacement was measured simultaneously with the propagation. The displacement of the multilayer actuator became gradually smaller and asymmetric with respect to the sign of the field with increased driving cycle.