Journal article
High cycle fatigue damage and life time prediction for tetragonal ferroelectrics under electromechanical loading



Publication Details
Authors:
Lange, S.; Ricoeur, A.
Publisher:
Elsevier Science B.V., Amsterdam.
Publication year:
2016
Journal:
International Journal of Solids and Structures
Pages range:
181-192
Volume number:
80
Start page:
181
End page:
192
Number of pages:
12
ISSN:
0020-7683

Abstract
High cycle fatigue is one of the most crucial problems in designing reliable ferroelectric actuators and sensors. On the micro- and mesoscales, fatigue crack growth determines the life time of the smart ceramic devices, being controlled by both mechanical and electric loads. Giving rise to residual stresses, ferroelectric domain switching and domain wall motion mediate between crack tip and external loading. Thus, two dissipative processes have to be modeled on the microscale, finally leading to evolutions of damage as well as macroscopic piezoelectric, dielectric and stiffness properties. A condensed approach is used to solve the nonlinear constitutive problem of a polycrystalline representative volume and an accumulation model is applied to efficiently handle predictions of high cycle loading. Numerical examples help investigating measures to foster the life time of ferroelectric devices, always keeping an eye on the actuating performance of the system. (C) 2015 Elsevier Ltd. All rights reserved.


Keywords
Condensed model, Crack growth, Damage evolution, Domain switching, Domain walls, Effective properties, Ferroelectrics, Piezoelectrics


Authors/Editors

Last updated on 2019-25-07 at 11:49