A condensed microelectromechanical constitutive and damage model for tetragonal ferroelectrics |
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| Authors: | Stephan Lange Andreas Ricoeur |
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| Institution: | Institute of Mechanics, Chair of Engineering Mechanics / Continuum Mechanics, University of Kassel, Moenchebergstr. 7, 34109 Kassel, Germany |
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| Abstract: | A condensed model for ferroelectric solids with tetragonal unit cells is presented. The approach is microelectromechanically and physically motivated, considering discrete switching processes on the level of unit cells and quasi-continuous evolution of inelastic fields on the domain wall level. To calculate multiple grain interactions an interaction tensor is introduced. Hysteresis loops are simulated for pure electric and electromechanical loading, demonstrating e.g. the influence of a compressive preload on the poling process and interaction between statistically arranged crystallits. The residual stresses and the corresponding principle stresses are used to simulate fatigue damage in ferroelectric materials. (© 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim) |
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