...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Smart Materials & Structures >Effects of floating electrodes on the reliability of electrostrictive ceramic multilayer actuators
【24h】

Effects of floating electrodes on the reliability of electrostrictive ceramic multilayer actuators

机译：浮动电极对电致伸缩陶瓷多层致动器可靠性的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To investigate the toughness enhancing effect of a floating electrode on an actuator, a conventional actuator and an actuator with a floating electrode are numerically analyzed using the finite element method. Electrostatic analysis is performed for both types of actuators based on an assumption of the mathematical equivalence between out-of-plane deformation and electrostatics. The electric behavior of a ceramic is idealized by the electric displacement saturation model. The numerical results of electric fields and electric displacement fields are obtained from the electrostatic analysis. For both types of actuators, the self-equilibrating stress fields induced by a non-uniform distribution of the electric displacement fields are computed using the finite element method. The stress intensity factors for a flaw-like crack nucleated from the edge of an internal electrode are evaluated for each case. We found that the stress intensity factor for the actuator with a floating electrode is smaller than the factor for the conventional actuator when the length of the flaw-like crack is approximately equal to the grain size. Thus, we conclude that actuators with floating electrodes have higher reliability than conventional actuators.
机译：为了研究浮动电极对致动器的韧性增强效果，使用有限元方法对常规致动器和具有浮动电极的致动器进行了数值分析。根据平面外变形和静电之间的数学等价假设，对两种类型的执行器都进行静电分析。陶瓷的电行为通过电位移饱和模型理想化。通过静电分析获得电场和位移场的数值结果。对于这两种类型的执行器，使用有限元方法计算由电位移场的不均匀分布引起的自平衡应力场。分别评估从内部电极边缘成核的类似裂纹的应力强度因子。我们发现，当裂纹状裂纹的长度大约等于晶粒尺寸时，带有浮动电极的致动器的应力强度因子小于常规致动器的应力强度因子。因此，我们得出结论，具有浮动电极的执行器比常规执行器具有更高的可靠性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号