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- W1998967917 abstract "A constitutive model for rate dependent behavior of ferroelectric materials is developed from a one-dimensionalswitching model [Ikeda et al., Proc. SPIE, 7289 (2009), 728905]. The one-dimensional switching model has thefollowing three features. (i) Several ferroelectric variants can be considered, such as 0-degree, 90-degree, 180-degree,and initial mixed variants. (ii) Required switching energy is approximated as a sum of two exponential functions ofvolume fraction of the variants. (iii) A specimen is assumed to be comprised of grains with infinitesimal size, andrelationship between two grains regarding the required switching energy is unchanged independently of switchingdirections. Accordingly, the switching proceeds one-dimensionally. To take into account loading rate effects, a functionof volume fraction rate is added to the required switching energy. That makes energy barrier higher at higher rates. Toverify validity of the present model, electro-mechanical behavior of a thin PZT plate is measured at various loading ratesand simulated using the present model. Result shows the present model can capture the influence of electric loading rateon responses of electric displacement and strain, such that remnant polarization decreases and coercive field increaseswith increasing the loading rate." @default.
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- W1998967917 date "2011-03-24" @default.
- W1998967917 modified "2023-09-23" @default.
- W1998967917 title "Constitutive model for rate dependent behavior of ferroelectric materials" @default.
- W1998967917 doi "https://doi.org/10.1117/12.880398" @default.
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