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首页> 外文会议>Conference on Smart Structures and Materials 2000 Active Materials: Behavior and Mechanics 6-9 March 2000 Newport Beach, USA >A Model for Rate-Dependent Hysteresis in Piezoceramic Materials Operating at Low Frequencies
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A Model for Rate-Dependent Hysteresis in Piezoceramic Materials Operating at Low Frequencies

机译：在低频下工作的压电陶瓷材料的速率相关磁滞模型

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摘要

This paper addresses the modleing of certain rate-dependent mechanisms which contribute to hysteresis inherent to piezoelectric materials operating at low frequencies. While quasistatic models are suitable for initial mateiral characterization in some applications, the reduction in coercive field and polarization values which occur as frequencies increase must be accommodated to attain the full capabilities of the materials. The model employed here quantifies the hysteresis in two steps. I nthe first, anhysteretic polarization switching is modeled through the application of Boltzmann principles to balance the electrostatic and thermal energy. Hysteresis is then incorporated through the quantification of energy required to translate and bend domain walls pinned at inclusions inherent to the materials. The performance of the model is illustrated through a fit to low frequency data (0.1 Hz - 1 Hz) from a PZT5A wafer.
机译：本文介绍了某些速率相关机制的模型，这些机制会导致低频工作的压电材料固有的磁滞现象。虽然准静态模型适合某些应用中的初始材料表征，但必须适应随着频率增加而发生的矫顽场和极化值的降低，以实现材料的全部功能。这里采用的模型分两个步骤量化磁滞。首先，通过应用玻耳兹曼原理来平衡静电和热能，模拟了迟滞极化转换。然后，通过量化平移和弯曲钉扎在材料固有夹杂物上的畴壁所需的能量，可以纳入磁滞现象。通过拟合来自PZT5A晶片的低频数据（0.1 Hz-1 Hz）来说明模型的性能。

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