DOMAIN SWITCHING EMISSION FROM THE MIXED-MODE CRACK IN PIEZOELECTRICS/FERROELECTRICS
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- 英文论文题名：DOMAIN SWITCHING EMISSION FROM THE MIXED-MODE CRACK IN PIEZOELECTRICS/FERROELECTRICS
- 论文作者：Su-xin PAN ; Qi-da LIU ; Jie WANG ; Qun LI
- 英文论文作者：Su-xin PAN ; Qi-da LIU ; Jie WANG ; Qun LI ; State Key Laboratory for Strength and Vibration of Mechanical Structures ; School of Aerospace ; Xi'an Jiaotong University ; Department of Engineering Mechanics ; School of Aeronautics and Astronautics ; Zhejiang University
- 年：2016
- 作者机构：State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University;Department of Engineering Mechanics, School of Aeronautics and Astronautics, Zhejiang University;
- 英文论文关键词：Piezoelectric/ferroelectric ; Domain switching emission ; Crack ; Birefringence ; Phase field modeling
- 会议召开时间：2016-10-21
- 会议录名称：2016年全国压电和声波理论及器件应用研讨会论文摘要集
- 英文会议录名称：Abstract Book of 2016 Symposium on Piezoelectricity, Acoustic Waves and Device Applications
- 语种：英文
- 分类号：O346.1
- 学会代码：AGLU
- 会议名称：2016年全国压电和声波理论及器件应用研讨会
- 会议地点：中国陕西西安
- 主办单位：中国力学学会、中国声学学会、IEEE UFFC分会
- 学会名称：中国力学学会
- 页数：2
- 文件大小：93k
- 原文格式：D
- 会议级别：全国
摘要
Background, Motivation and Objective The wide use of piezoelectric/ferroelectric ceramics in smart structures, such as sensors and actuators, raises the important issue of their reliability. Piezoelectric/Ferroelectric ceramics are brittle and susceptible to cracking at all scales ranging from electric domain to devices since the materials often possess the mixed-mode fracture under mechanical or electrical loadings. The fracture behaviors of piezoelectric/ferroelectric ceramics show a high complexity attributed to the inhomogeneous electro-mechanical fields induced by domain switching near the crack tip. Although the profile of domain switching zone in the vicinity of a crack tip has been carried out by theoretical and experimental investigations, the real spatial and temporal evolution of domain switching near the crack tip is rarely reported in piezoelectrics/ferroelectrics, especially through experimental observation. In this study, the experiments are conducted to observe the variation of spontaneous polarization and in turn electrical creep and domain switching emission from the crack tip of an inclined crack in piezoelectrics/ferroelectrics using a standard birefringence system. Moreover, two-dimensional phase field simulations are carried out to capture electrical creep and domain switching emission from the crack tip of a stationary inclined crack embedded in piezoelectrics/ferroelectrics. Statement of Contribution/Methods The spatial and temporal evolution of domain switching near the tip of a mixed-mode crack(e.g., an inclined crack) is observed in piezoelectrics/ferroelectrics. The birefringence technique is used to measure the optical quantities to demonstrate the domain switching near the crack tip. Moreover, the phase field modeling is developed to simulate polarization distribution and domain switching near the crack tip where the time-dependent Ginzburg–Landau equation is used to describe the change of polarization. Results The birefringence results show an intriguing feature that there appears electrical creep and domain switching emission from the crack tip. The actual time-dependence of domain switching emission and its anisotropic velocity is approximately measured. The phase field results indicate the same features of domain switching emission from the mixed-mode crack. A good agreement between phase field simulation and birefringence measurement is concluded by setting the appropriate kinetic coefficient in the time-dependent Ginzburg–Landau equation. Discussion and Conclusions The time-dependent remnant polarization, i.e., creep, is observed near an inclined crack tip under a constant impressed voltage by the strain-birefringence correlation technique. The domain switching emission is revealed from the inclined crack tip and the velocity of switching emission is approximately measured. It is concluded that the velocity of domain switching emission from the crack tip shows an anisotropic feature. Both ferroelectric creep and domain switching emission are successfully predicted by the phase field modeling. The real temporal evolution of switching emission can be captured by setting the appropriate kinetic coefficient in TDGL equation through fitting the domain switching emission velocity in birefringence experiment.
Background, Motivation and Objective The wide use of piezoelectric/ferroelectric ceramics in smart structures, such as sensors and actuators, raises the important issue of their reliability. Piezoelectric/Ferroelectric ceramics are brittle and susceptible to cracking at all scales ranging from electric domain to devices since the materials often possess the mixed-mode fracture under mechanical or electrical loadings. The fracture behaviors of piezoelectric/ferroelectric ceramics show a high complexity attributed to the inhomogeneous electro-mechanical fields induced by domain switching near the crack tip. Although the profile of domain switching zone in the vicinity of a crack tip has been carried out by theoretical and experimental investigations, the real spatial and temporal evolution of domain switching near the crack tip is rarely reported in piezoelectrics/ferroelectrics, especially through experimental observation. In this study, the experiments are conducted to observe the variation of spontaneous polarization and in turn electrical creep and domain switching emission from the crack tip of an inclined crack in piezoelectrics/ferroelectrics using a standard birefringence system. Moreover, two-dimensional phase field simulations are carried out to capture electrical creep and domain switching emission from the crack tip of a stationary inclined crack embedded in piezoelectrics/ferroelectrics. Statement of Contribution/Methods The spatial and temporal evolution of domain switching near the tip of a mixed-mode crack(e.g., an inclined crack) is observed in piezoelectrics/ferroelectrics. The birefringence technique is used to measure the optical quantities to demonstrate the domain switching near the crack tip. Moreover, the phase field modeling is developed to simulate polarization distribution and domain switching near the crack tip where the time-dependent Ginzburg–Landau equation is used to describe the change of polarization. Results The birefringence results show an intriguing feature that there appears electrical creep and domain switching emission from the crack tip. The actual time-dependence of domain switching emission and its anisotropic velocity is approximately measured. The phase field results indicate the same features of domain switching emission from the mixed-mode crack. A good agreement between phase field simulation and birefringence measurement is concluded by setting the appropriate kinetic coefficient in the time-dependent Ginzburg–Landau equation. Discussion and Conclusions The time-dependent remnant polarization, i.e., creep, is observed near an inclined crack tip under a constant impressed voltage by the strain-birefringence correlation technique. The domain switching emission is revealed from the inclined crack tip and the velocity of switching emission is approximately measured. It is concluded that the velocity of domain switching emission from the crack tip shows an anisotropic feature. Both ferroelectric creep and domain switching emission are successfully predicted by the phase field modeling. The real temporal evolution of switching emission can be captured by setting the appropriate kinetic coefficient in TDGL equation through fitting the domain switching emission velocity in birefringence experiment.
Background, Motivation and Objective The wide use of piezoelectric/ferroelectric ceramics in smart structures, such as sensors and actuators, raises the important issue of their reliability. Piezoelectric/Ferroelectric ceramics are brittle and susceptible to cracking at all scales ranging from electric domain to devices since the materials often possess the mixed-mode fracture under mechanical or electrical loadings. The fracture behaviors of piezoelectric/ferroelectric ceramics show a high complexity attributed to the inhomogeneous electro-mechanical fields induced by domain switching near the crack tip. Although the profile of domain switching zone in the vicinity of a crack tip has been carried out by theoretical and experimental investigations, the real spatial and temporal evolution of domain switching near the crack tip is rarely reported in piezoelectrics/ferroelectrics, especially through experimental observation. In this study, the experiments are conducted to observe the variation of spontaneous polarization and in turn electrical creep and domain switching emission from the crack tip of an inclined crack in piezoelectrics/ferroelectrics using a standard birefringence system. Moreover, two-dimensional phase field simulations are carried out to capture electrical creep and domain switching emission from the crack tip of a stationary inclined crack embedded in piezoelectrics/ferroelectrics. Statement of Contribution/Methods The spatial and temporal evolution of domain switching near the tip of a mixed-mode crack(e.g., an inclined crack) is observed in piezoelectrics/ferroelectrics. The birefringence technique is used to measure the optical quantities to demonstrate the domain switching near the crack tip. Moreover, the phase field modeling is developed to simulate polarization distribution and domain switching near the crack tip where the time-dependent Ginzburg–Landau equation is used to describe the change of polarization. Results The birefringence results show an intriguing feature that there appears electrical creep and domain switching emission from the crack tip. The actual time-dependence of domain switching emission and its anisotropic velocity is approximately measured. The phase field results indicate the same features of domain switching emission from the mixed-mode crack. A good agreement between phase field simulation and birefringence measurement is concluded by setting the appropriate kinetic coefficient in the time-dependent Ginzburg–Landau equation. Discussion and Conclusions The time-dependent remnant polarization, i.e., creep, is observed near an inclined crack tip under a constant impressed voltage by the strain-birefringence correlation technique. The domain switching emission is revealed from the inclined crack tip and the velocity of switching emission is approximately measured. It is concluded that the velocity of domain switching emission from the crack tip shows an anisotropic feature. Both ferroelectric creep and domain switching emission are successfully predicted by the phase field modeling. The real temporal evolution of switching emission can be captured by setting the appropriate kinetic coefficient in TDGL equation through fitting the domain switching emission velocity in birefringence experiment.
引文