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Macroscopic constitutive model for ergodic and non-ergodic lead-free relaxors

Streich, Friedemann A. 1; Martin, Alexander; Webber, Kyle G.; Kamlah, Marc ORCID iD icon 1
1 Karlsruher Institut für Technologie (KIT)

Abstract:

A fully electromechanically coupled, three dimensional phenomenological constitutive model for relaxor ferroelectric materials was developed for the use in a finite-element-method (FEM) solution procedure. This macroscopic model was used to simulate the macroscopic electromechanical response of lead-free ergodic 0.94Na1/2Bi1/2TiO3−0.06BaTiO3 and non-ergodic 0.90Na1/2Bi1/2TiO3−0.06BaTiO3−0.04K0.5Na0.5NbO3 relaxor materials. The presented constitutive model is capable of accounting for the observed pinched hysteretic response as well as non-deviatoric polarization induced strain and internal order transitions. Time integration of the history dependent internal variables is done with a predictor-corrector integration scheme. The adaptability of the constitutive model regarding the pinching of the hystereses is shown. Simulations are compared to experimental observations.


Verlagsausgabe §
DOI: 10.5445/IR/1000137398
Originalveröffentlichung
DOI: 10.1177/1045389X211038680
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Dimensions
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoff- und Biomechanik (IAM-WBM)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 01.05.2022
Sprache Englisch
Identifikator ISSN: 1045-389X, 1530-8138
KITopen-ID: 1000137398
HGF-Programm 43.31.01 (POF IV, LK 01) Multifunctionality Molecular Design & Material Architecture
Erschienen in Journal of intelligent material systems and structures
Verlag SAGE Publications
Band 33
Heft 8
Seiten 1002-1017
Vorab online veröffentlicht am 23.08.2021
Schlagwörter lead-free relaxor ferroelectrics, macroscopic phenomenological constitutive model, finite-element implementation
Nachgewiesen in Dimensions
Web of Science
Scopus
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