TY - GEN
T1 - CRACKING IN FERROELECTRIC AND ANTIFERROELECTRIC CERAMIC MULTILAYER ACTUATORS
AU - Gong, Xiaoyan
AU - Yu, Honghui
AU - Suo, Zhigang
AU - McMeeking, Robert M.
N1 - Publisher Copyright:
© 1996 American Society of Mechanical Engineers (ASME). All rights reserved.
PY - 1996
Y1 - 1996
N2 - This paper models cracking in the poling process of a ferroelectric actuator and the operation of an antiferroelectric actuator. In each case, domain switching or phase transition produces large electric displacement and strain. Around an internal electrode edge, such strain causes cracking, which, in turn, is a precursor to electrical breakdown. We model domain switching or phase transition by large increases of both the electric displacement and field induced strain under a small change in the electric field near the coercive field. Ignoring the stress contribution to the electric field, we solve the electric field around the internal electrode edge for nonlinear electric field and electric displacement relations. We then solve a standard elastic residual strain problem to determine the stresses in the structure. Fracture mechanics is then used to determine the cracking conditions in actuators. We find that a critical thickness exists, below which cracking will not occur. This agrees with the prediction of Hao et al (1996), and Gong and Suo (1996).
AB - This paper models cracking in the poling process of a ferroelectric actuator and the operation of an antiferroelectric actuator. In each case, domain switching or phase transition produces large electric displacement and strain. Around an internal electrode edge, such strain causes cracking, which, in turn, is a precursor to electrical breakdown. We model domain switching or phase transition by large increases of both the electric displacement and field induced strain under a small change in the electric field near the coercive field. Ignoring the stress contribution to the electric field, we solve the electric field around the internal electrode edge for nonlinear electric field and electric displacement relations. We then solve a standard elastic residual strain problem to determine the stresses in the structure. Fracture mechanics is then used to determine the cracking conditions in actuators. We find that a critical thickness exists, below which cracking will not occur. This agrees with the prediction of Hao et al (1996), and Gong and Suo (1996).
UR - https://www.scopus.com/pages/publications/85169159866
U2 - 10.1115/IMECE1996-0686
DO - 10.1115/IMECE1996-0686
M3 - 会议稿件
AN - SCOPUS:85169159866
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
SP - 703
EP - 712
BT - Aerospace
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 1996 International Mechanical Engineering Congress and Exposition, IMECE 1996
Y2 - 17 November 1996 through 22 November 1996
ER -