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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.

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 Scopus
Dimensions
Web of Science

Verlagsausgabe §
DOI: 10.5445/IR/1000137398
Veröffentlicht am 15.09.2021
Originalveröffentlichung
DOI: 10.1177/1045389X211038680
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Dimensions
Zitationen: 1
Seitenaufrufe: 92
seit 15.09.2021
Downloads: 106
seit 19.09.2021
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